Vehicle charger with three-dimensional water cooling circuit, power assembly and electric vehicle

Abstract

The application provides a vehicle-mounted charger with a three-dimensional water cooling circuit, a power assembly and an electric vehicle. An electrical component of the vehicle-mounted charger is used for charging and discharging a power battery of the electric vehicle. A shell of the vehicle-mounted charger includes a cover plate and a containing groove. The cover plate is used for enclosing the containing groove in a first direction, and the containing groove is used for containing the electrical component of the vehicle-mounted charger. The three-dimensional water cooling circuit of the vehicle-mounted charger includes a first water cooling heat sink, a second water cooling heat sink, a shell water inlet flow channel and a shell water outlet flow channel. The first water cooling heat sink and the second water cooling heat sink are arranged in a stack in the first direction. The electrical component of the vehicle-mounted charger is arranged between the first water cooling heat sink and the second water cooling heat sink. The application utilizes the first water cooling heat sink and the second water cooling heat sink to form double-side heat dissipation for the electrical component, which is conducive to enhancing the cooling effect of the vehicle-mounted charger.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric vehicles, and in particular to a vehicle-mounted charger with a three-dimensional water cooling circuit, a power assembly, and an electric vehicle. BACKGROUND

[0002] In the new energy vehicle industry, the power assembly is the power source of the vehicle. In the power assembly, the vehicle-mounted charger is used to realize charging and discharging of the power battery, and to ensure normal driving of the vehicle. When the vehicle-mounted charger is in a working state, a large amount of heat is generated by the internal components of the vehicle-mounted charger. However, the heat dissipation effect of the vehicle-mounted charger is not good at present, and the internal components generate a lot of heat, which negatively affects the working efficiency of the vehicle-mounted charger and the power assembly. SUMMARY

[0003] The embodiments of the present application provide a vehicle-mounted charger with a three-dimensional water cooling circuit, a power assembly, and an electric vehicle, which can enhance the heat dissipation effect of the vehicle-mounted charger.

[0004] In a first aspect, the embodiments of the present application provide a vehicle-mounted charger. The electrical components of the vehicle-mounted charger are used to charge and discharge the power battery of an electric vehicle. The housing of the vehicle-mounted charger includes a cover plate and a receiving groove. The cover plate is used to enclose the receiving groove along a first direction, and the receiving groove is used to accommodate the electrical components of the vehicle-mounted charger.

[0005] The three-dimensional water cooling circuit of the vehicle-mounted charger includes a first water cooling heat sink, a second water cooling heat sink, a shunt flow channel, a housing water inlet flow channel, and a housing water outlet flow channel. The first water cooling heat sink and the second water cooling heat sink are stacked along the first direction, and the electrical components of the vehicle-mounted charger are arranged between the first water cooling heat sink and the second water cooling heat sink.

[0006] The first water cooling heat sink includes a first partition protrusion, a second partition protrusion, a first communication hole, a second communication hole, a third communication hole, and a fourth communication hole. The first partition protrusion and the second partition protrusion are used to divide the flow channel of the first water cooling heat sink into a first heat sink flow channel and a second heat sink flow channel, and the shunt flow channel is used to communicate the first heat sink flow channel and the second heat sink flow channel. The first partition protrusion is distributed between the first communication hole and the second communication hole, and the second partition protrusion is distributed between the third communication hole and the fourth communication hole.

[0007] The first communication hole and the third communication hole are distributed in the first heat dissipation plate flow channel, and the second communication hole and the fourth communication hole are distributed in the second heat dissipation plate flow channel. The first heat dissipation plate flow channel is used for receiving cooling water from the shell water inlet flow channel through the first communication hole, and the first heat dissipation plate flow channel is used for conveying the cooling water to the inlet of the flow channel of the second water-cooled heat dissipation plate through the third communication hole. The second heat dissipation plate flow channel is used for receiving cooling water from the outlet of the flow channel of the second water-cooled heat dissipation plate through the fourth communication hole, the second heat dissipation plate flow channel is used for receiving cooling water from the first heat dissipation plate flow channel through the shunt flow channel, and the second heat dissipation plate flow channel is used for conveying the cooling water to the shell water outlet flow channel through the second communication hole.

[0008] In the embodiment of the present application, some electrical components have high loss density and generate a lot of heat during operation. The high loss density of the electrical components generates heat, which not only reduces the working efficiency of the electrical components, but also negatively affects the electrical components with low temperature resistance.

[0009] To solve the above problems, in the embodiment of the present application, the electrical components are arranged between the first water-cooled heat dissipation plate and the second water-cooled heat dissipation plate along the first direction, and the cooling water in the first water-cooled heat dissipation plate and the second water-cooled heat dissipation plate can cool the electrical components from different angles, achieving three-dimensional cooling of the electrical components, which is beneficial to expand the cooling range of the cooling water on the electrical components and avoid the problem of insufficient local cooling.

[0010] In the embodiment of the present application, the shell water inlet flow channel and the shell water outlet flow channel are respectively used to realize the input and output of the cooling water in the vehicle-mounted charger, indicating that the cooling water in the first water-cooled heat dissipation plate and the second water-cooled heat dissipation plate is in a state of continuous flow and update, which is beneficial to enhance the cooling effect of the first water-cooled heat dissipation plate and the second water-cooled heat dissipation plate on the electrical components.

[0011] In the embodiment of the present application, the first water-cooled heat dissipation plate and the second water-cooled heat dissipation plate are connected to each other through the third communication hole and the fourth communication hole. The first water-cooled heat dissipation plate and the second water-cooled heat dissipation plate are connected to the shell water inlet flow channel through the first communication hole and connected to the shell water outlet flow channel through the second communication hole, and the first communication hole, the second communication hole, the third communication hole and the fourth communication hole are distributed in the first water-cooled heat dissipation plate, which is beneficial to simplify the structure of the three-dimensional water-cooled circuit of the vehicle-mounted charger. In addition, it is also beneficial to design the first water-cooled heat dissipation plate and the second water-cooled heat dissipation plate into a cooling form of series-parallel connection according to the heat dissipation demand of the electrical components, and improve the practicability of the first water-cooled heat dissipation plate and the second water-cooled heat dissipation plate.

[0012] In the embodiment of the present application, the first partitioning protrusion and the second partitioning protrusion are used to divide the first water-cooled heat sink into the first heat sink flow channel and the second heat sink flow channel. The embodiment of the present application utilizes the first partitioning protrusion, the second partitioning protrusion, and the flow distribution flow channel to realize the series-parallel hybrid design in the first water-cooled heat sink and the second water-cooled heat sink. After the cooling water flows into the first heat sink flow channel from the first communication hole, the cooling water is distributed into two paths at the flow distribution flow channel. One path of the cooling water flows to the second water-cooled heat sink, and the other path of the cooling water flows to the second heat sink flow channel. Since the second water-cooled heat sink is in communication with the first water-cooled heat sink, the cooling water in the one path eventually flows back to the second heat sink flow channel from the second water-cooled heat sink.

[0013] In the embodiment of the present application, the first water-cooled heat sink and the second water-cooled heat sink are in series-parallel hybrid, which can comprehensively utilize the advantages of the series branch and the parallel branch. The flow of the cooling water in the series branch is relatively large, and the series branch has the advantage of small thermal resistance. The second heat sink flow channel of the first water-cooled heat sink includes the series branch, which can avoid the temperature of the cooling water in the first water-cooled heat sink from rising too fast, and is beneficial to improving the cooling efficiency of the first water-cooled heat sink. The flow of the cooling water in the parallel branch is relatively small, and the parallel branch has the advantage of small flow resistance. The second water-cooled heat sink needs to be in communication with the shell water inlet flow channel and the shell water outlet flow channel through the first water-cooled heat sink, and the second water-cooled heat sink includes a parallel branch, which is beneficial to reducing the flow resistance loss of the cooling water between the first water-cooled heat sink and the second water-cooled heat sink.

[0014] In the embodiment of the present application, the first partitioning protrusion and the second partitioning protrusion divide the first water-cooled heat sink into the first heat sink flow channel and the second heat sink flow channel, and the first heat sink flow channel and the second heat sink flow channel are in communication through the flow distribution flow channel, so that the cooling water can flow according to the pre-designed series-parallel hybrid mode. If the first partitioning protrusion and the second partitioning protrusion do not divide the first heat sink flow channel and the second heat sink flow channel, that is, there is no obvious boundary between the first heat sink flow channel and the second heat sink flow channel, it may cause the flow path of the cooling water to be relatively chaotic, and it is difficult to comprehensively utilize the advantages of the series branch and the parallel branch.

[0015] In one embodiment, the flow distribution flow channel is distributed in the gap between the first partitioning protrusion and the second partitioning protrusion.

[0016] In the embodiment of the present application, the shunt flow channel is used to directly communicate the first heat sink flow channel and the second heat sink flow channel. After the cooling water flows into the first heat sink flow channel from the first communication hole, it is divided into two paths at the shunt flow channel. One path of the cooling water flows to the second heat sink flow channel and the second communication hole in sequence through the shunt flow channel, and the other path of the cooling water also flows into the second heat sink flow channel after flowing through the third communication hole, the second water-cooled heat sink and the fourth communication hole in sequence. The cooling water flows from the first communication hole to the shunt flow channel and from the first communication hole to the fourth communication hole to form two parallel branches, the cooling water of the two parallel branches converges at the second heat sink flow channel and flows to the second communication hole to form a serial branch, and a cooling mode of first parallel and then serial is formed in the first water-cooled heat sink and the second water-cooled heat sink. In the embodiment of the present application, the shunt flow channel is integrated in the first water-cooled heat sink, which is conducive to simplifying the overall structure of the three-dimensional water-cooled circuit of the vehicle-mounted charger in the case of realizing the serial-parallel design.

[0017] In an embodiment, the shunt flow channel is distributed between the inlet of the flow channel of the second water-cooled heat sink and the outlet of the flow channel of the second water-cooled heat sink. The inlet of the shunt flow channel is used to communicate the first heat sink flow channel through the inlet of the flow channel of the second water-cooled heat sink, and the outlet of the shunt flow channel is used to communicate the second heat sink flow channel through the outlet of the flow channel of the second water-cooled heat sink.

[0018] In the embodiment of the present application, the cooling water flows through the first heat sink flow channel and the inlet of the second water-cooled heat sink in sequence from the first communication hole, and is divided into two paths at the shunt flow channel. One path of the cooling water flows to the fourth communication hole and the second heat sink flow channel in sequence through the shunt flow channel, and the other path of the cooling water also flows into the second heat sink flow channel after flowing through the flow channel of the second water-cooled heat sink. In the embodiment of the present application, the serial branch extends from the second heat sink flow channel to the second water-cooled heat sink, which is conducive to the cooling efficiency of the second water-cooled heat sink for cooling the electrical components.

[0019] In an embodiment, the surface of the first water-cooled heat sink facing the second water-cooled heat sink in the first direction includes a first communication interface and a second communication interface. The surface of the second water-cooled heat sink facing the first water-cooled heat sink in the first direction is used to fix the first communication interface and the second communication interface. The first communication interface is used to communicate the third communication hole and the inlet of the flow channel of the second water-cooled heat sink, and the second communication interface is used to communicate the fourth communication hole and the outlet of the flow channel of the second water-cooled heat sink.

[0020] The shunt flow channel is distributed between the first communication interface and the second communication interface. The inlet of the shunt flow channel is used to communicate the first heat sink flow channel through the first communication interface, and the outlet of the shunt flow channel is used to communicate the second heat sink flow channel through the second communication interface.

[0021] In the embodiment of the present application, the first communication interface and the second communication interface are used to communicate the first water-cooled heat sink and the second water-cooled heat sink. The first communication interface and the second communication interface are integrated in the first water-cooled heat sink and fixed with the second water-cooled heat sink, which can increase the structural stability of the first communication interface and the second communication interface, and also help to avoid leakage of the cooling water during the flow between the first water-cooled heat sink and the second water-cooled heat sink.

[0022] In the embodiment of the present application, the shunt flow channel is distributed between the first communication interface and the second communication interface, and arranged between the first water-cooled heat sink and the second water-cooled heat sink along the first direction, which can realize three-side heat dissipation of the electrical components. Part of the second communication interface is used to form a series branch, which helps to improve the cooling efficiency of the second communication interface on the electrical components.

[0023] In one embodiment, the first water-cooled heat sink further comprises a plurality of heat dissipation teeth and a plurality of flow guide teeth.

[0024] Among them, the first separation protrusion is used to separate the first communication hole and the second communication hole. A plurality of heat dissipation teeth are distributed on both sides of the first separation protrusion, and a plurality of flow guide teeth are distributed on both sides of the first separation protrusion. The length of each flow guide tooth is greater than the length of each heat dissipation tooth, and the gap between adjacent two heat dissipation teeth is smaller than the gap between adjacent two flow guide teeth.

[0025] In the embodiment of the present application, the length of the heat dissipation tooth is smaller than the length of the flow guide tooth, and the heat dissipation tooth is arranged more closely than the flow guide tooth, so that the interaction between the cooling water and the heat dissipation tooth is stronger, and the heat dissipation tooth can play a role of flow disturbance on the cooling water, enhancing the heat dissipation effect. The length of the flow guide tooth is greater than the length of the heat dissipation tooth, which facilitates the flow of the cooling water along the extension direction of the flow guide tooth, and the flow guide tooth can guide the flow direction of the cooling water, realizing uniform distribution of the cooling water flow. The arrangement of the flow guide tooth is less close than the arrangement of the heat dissipation tooth, which is helpful to reduce the flow resistance of the cooling water. Integrating a plurality of heat dissipation teeth and a plurality of flow guide teeth in the first water-cooled heat sink is helpful to enhance the heat dissipation effect of the first water-cooled heat sink.

[0026] In the embodiment of the present application, the first separation protrusion is used to separate the first communication hole and the second communication hole, which is helpful to avoid the cooling water flowing directly from the first communication hole to the second communication hole. The two sides of the first separation protrusion are distributed with heat dissipation teeth and flow guide teeth, so that the first heat sink flow channel and the second heat sink flow channel can cooperate with the heat dissipation teeth and the flow guide teeth.

[0027] In one embodiment, at least one of the number, shape or arrangement of the flow guide teeth or the heat dissipation teeth on both sides of the first separation protrusion is different.

[0028] The embodiment of the present application is convenient for adjusting the layout of the heat dissipation teeth and the flow guide teeth according to the actual heat dissipation demand of the electrical components.

[0029] In an embodiment, the first water-cooled heat sink comprises a flow channel groove. The flow channel groove is integrated into the surface of the cover plate facing away from the accommodation groove in the first direction.

[0030] The cover plate comprises a sealing plate. The sealing plate is distributed outside the accommodation groove, and the sealing plate is used to cover the opening of the flow channel groove in the first direction.

[0031] In the embodiments of the present application, the flow channel groove of the first water-cooled heat sink is integrated into the cover plate, which is conducive to enhancing the structural strength of the flow channel groove. In addition, the embodiments of the present application can also improve the integration of the on-board charger, which is conducive to realizing the lightweight design of the on-board charger and optimizing the layout of the power assembly.

[0032] In the embodiments of the present application, the air in the accommodation groove expands in volume after being heated and tends to move upward to the cover plate. Integrating the flow channel groove of the first water-cooled heat sink into the cover plate is conducive to heat exchange between the first water-cooled heat sink and the hot air in the accommodation groove. In addition, it can also avoid occupying the space in the accommodation groove by the first water-cooled heat sink, which is conducive to optimizing the layout of the plurality of electrical components in the accommodation groove

[0033] In the embodiments of the present application, the first water-cooled heat sink and the second water-cooled heat sink can also realize indirect cooling of the electrical components. Specifically, when the heat generated by the electrical components with high loss density causes the temperature in the accommodation groove to rise, the air expands in volume and decreases in density after being heated, so that the hot air tends to flow upward to the cover plate. The flow channel groove of the first water-cooled heat sink is integrated into the cover plate, and the cooling water in the flow channel groove can exchange heat with the hot air, taking away the heat in the air, which is conducive to reducing the temperature in the accommodation groove and effectively improving the heat dissipation efficiency.

[0034] In the embodiments of the present application, the cooling water with relatively low temperature in the water inlet flow channel of the shell flows into the first water-cooled heat sink through the first communication hole, and the first water-cooled heat sink is relatively farther away from the groove bottom of the accommodation groove than the second water-cooled heat sink, which facilitates the heat exchange between the cooling water with lower temperature in the first water-cooled heat sink and the hot air rising in the accommodation groove, thereby reducing the temperature in the accommodation groove.

[0035] In an embodiment, the area of the surface of the first water-cooled heat sink in the second direction is greater than the area of the surface of the second water-cooled heat sink in the second direction, and the second direction is perpendicular to the first direction.

[0036] In the embodiment of the present application, the second direction is perpendicular to the arrangement direction of the first water-cooled heat sink and the second water-cooled heat sink, the surface area of the first water-cooled heat sink along the second direction is larger than the surface area of the second water-cooled heat sink along the second direction, which can increase the contact area of the first water-cooled heat sink and the hot air, and is conducive to reducing the temperature in the accommodation groove. In addition, the first water-cooled heat sink is integrated into the cover plate, and the length of the first water-cooled heat sink in the second direction will not interfere with the layout of the electrical components in the accommodation groove. The second water-cooled heat sink is located in the accommodation groove, and if the surface area of the second water-cooled heat sink along the second direction is too large, the avoidance problem with the electrical components needs to be considered.

[0037] In an embodiment, the surface of the cover plate facing the accommodation groove along the first direction includes a plurality of fixing protrusions. The plurality of fixing protrusions are used to fix the circuit board and the electrical components of the vehicle charger, and the surface of the circuit board facing the cover plate along the first direction is used to fix the electrical components.

[0038] In the embodiment of the present application, the surface of the cover plate away from the accommodation groove is integrated with the first water-cooled heat sink, and the surface of the cover plate facing the accommodation groove is used to fix the electrical components. The fixing protrusions are part of the cover plate, and the fixing protrusions fix the electrical components, which is equivalent to that the cover plate directly contacts the electrical components. In this way, the path of heat transmission between the electrical components and the first water-cooled heat sink can be shortened without occupying the space of the accommodation groove by the first water-cooled heat sink, and the risk of leakage of cooling water can also be reduced.

[0039] In an embodiment, the water inlet flow channel and the water outlet flow channel of the shell are distributed on the outer side of the accommodation groove.

[0040] In the embodiment of the present application, the water inlet flow channel of the shell communicates with the flow channel of the first water-cooled heat sink through the first communication hole, and the water outlet flow channel of the shell communicates with the flow channel of the first water-cooled heat sink through the second communication hole. The flow channel groove is distributed on the surface of the cover plate away from the groove bottom of the accommodation groove, and the first communication hole and the second communication hole are distributed on the groove bottom of the flow channel groove. That is, the first communication hole and the second communication hole are closer to the outer side of the accommodation groove relative to the second water-cooled heat sink. If the water inlet flow channel and the water outlet flow channel of the shell are distributed on the inner side of the accommodation groove, the difficulty and processing cost of the communication between the water inlet flow channel and the water outlet flow channel of the shell and the first water-cooled heat sink will be increased, and the water inlet flow channel and the water outlet flow channel of the shell will also occupy the internal space of the accommodation groove.

[0041] In an embodiment, the outlet of the water inlet flow channel of the shell is used to communicate with the first communication hole, and the orientation of the outlet of the water inlet flow channel of the shell is the same as the orientation of the slot opening of the accommodation groove.

[0042] In the embodiment of the present application, the surface of the cover plate facing the accommodation groove along the first direction is used to fix the flow channel communication assembly, and the flow channel communication assembly is distributed on the outer side of the accommodation groove. One end of the flow channel communication assembly is used to cover the first communication hole, and the other end of the flow channel communication assembly is used to be embedded in the outlet of the water inlet flow channel of the shell.

[0043] In the embodiment of the present application, the flow channel communication assembly is used to realize the communication between the outlet of the shell water inlet flow channel and the first communication hole of the first water-cooled heat dissipation plate. The shell water inlet flow channel and the flow channel communication assembly are both distributed on the outer side of the containing groove, facilitating the inspection of the communication condition and reducing the difficulty of communication. The one end of the flow channel communication assembly covers the first communication hole, and the other end of the flow channel communication assembly is embedded in the outlet of the shell water inlet flow channel, which is conducive to avoiding the leakage of cooling water at the connection between the flow channel communication assembly and the shell water inlet flow channel and the cover plate.

[0044] In an embodiment, the inlet of the shell water outlet flow channel is used to receive the cooling water output by the first water-cooled heat dissipation plate, and the outlet of the shell water outlet flow channel is used to discharge the cooling water from the vehicle-mounted charger.

[0045] The inlet of the shell water outlet flow channel is distributed on the groove wall of the containing groove, and the outlet of the shell water outlet flow channel is distributed on the outer side of the containing groove. The direction of the inlet of the shell water outlet flow channel is opposite to the direction of the second communication hole, and the second communication hole is embedded in the inlet of the shell water outlet flow channel.

[0046] In the embodiment of the present application, the first water-cooled heat dissipation plate is integrated in the cover plate, and the cover plate and the containing groove are stacked along the first direction. The inlet of the shell water outlet flow channel is arranged on the groove wall of the containing groove, and the direction of the inlet of the shell water outlet flow channel is opposite to the direction of the second communication hole, which is conducive to shortening the transmission distance of the cooling water between the second communication hole and the shell water outlet flow channel. The outlet of the shell water outlet flow channel is arranged on the outer side of the containing groove, and the second communication hole is embedded in the inlet of the shell water outlet flow channel, which can avoid the leakage of cooling water with a higher temperature into the containing groove.

[0047] In an embodiment, the groove wall of the containing groove includes a first section of groove wall and a second section of groove wall. The first section of groove wall and the second section of groove wall are oppositely arranged along a second direction, and the second direction is perpendicular to the first direction.

[0048] Each of the first communication hole, the second communication hole, the third communication hole, the fourth communication hole, the outlet of the shell water inlet flow channel and the inlet of the shell water outlet flow channel is closer to the first section of groove wall than to the second section of groove wall.

[0049] In the embodiment of the present application, the first communication hole, the second communication hole, the third communication hole and the fourth communication hole are adjacent to the first section of the groove wall of the accommodating groove, so that the first communication hole, the second communication hole, the third communication hole and the fourth communication hole are arranged compactly, which is conducive to reducing the processing difficulty and cost of the flow channel groove. Among them, the third communication hole and the fourth communication hole are adjacent to the first section of the groove wall of the accommodating groove, so that the first communication interface and the second communication interface also approach the accommodating groove along the second direction, which can increase the space in the accommodating groove for accommodating the electrical components. The first communication hole and the second communication hole are adjacent to the first section of the groove wall of the accommodating groove, which facilitates the first communication hole and the second communication hole to communicate with the shell water inlet flow channel and the shell water outlet flow channel distributed outside the accommodating groove.

[0050] In the embodiment of the present application, the vehicle charger described in any one of the embodiments of the first aspect is applied to the power assembly, which can improve the heat dissipation effect of the vehicle charger, is conducive to making the vehicle charger work at a suitable temperature, and ensures the normal operation of the power assembly.

[0051] In the embodiment of the present application, the vehicle charger described in any one of the embodiments of the first aspect is applied to the power assembly, which can improve the heat dissipation effect of the vehicle charger, is conducive to making the vehicle charger work at a suitable temperature, and ensures the normal operation of the power assembly.

[0052] In the embodiment of the present application, the vehicle charger described in any one of the embodiments of the first aspect is applied to the power assembly, which can improve the heat dissipation effect of the vehicle charger, is conducive to making the vehicle charger work at a suitable temperature, and ensures the normal operation of the power assembly.

[0053] In the embodiment of the present application, the vehicle charger described in any one of the embodiments of the first aspect is applied to the power assembly, which can improve the heat dissipation effect of the vehicle charger, is conducive to making the vehicle charger work at a suitable temperature, and ensures the normal operation of the power assembly. BRIEF DESCRIPTION OF DRAWINGS

[0054] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be described below.

[0055] Figure 1 is a schematic diagram of an electric vehicle provided by the embodiments of the present application;

[0056] Figure 2 is a schematic diagram of a power assembly provided by the embodiments of the present application;

[0057] Figure 3 is a partial exploded view of a vehicle charger provided by the embodiments of the present application;

[0058] Figure 4 is a schematic diagram of a vehicle charger provided by the embodiments of the present application;

[0059] Figure 5 FIG. 1 is a schematic diagram of a vehicle charger provided by an embodiment of the present application;

[0060] Figure 6 FIG. 2 is a partial schematic diagram of the vehicle charger provided by an embodiment of the present application;

[0061] Figure 7 FIG. 3 is a partial schematic diagram of the vehicle charger provided by an embodiment of the present application;

[0062] Figure 8 FIG. 4 is a partial schematic diagram of the vehicle charger provided by an embodiment of the present application;

[0063] Figure 9 FIG. 5 is a partial cross-sectional view of a cover plate provided by an embodiment of the present application;

[0064] Figure 10 FIG. 6 is a partial cross-sectional view of a cover plate provided by an embodiment of the present application;

[0065] Figure 11 FIG. 7 is a partial cross-sectional view of a cover plate provided by an embodiment of the present application;

[0066] Figure 12 FIG. 8 is a schematic diagram of a cover plate provided by an embodiment of the present application;

[0067] Figure 13 FIG. 9 is a schematic diagram of a power assembly provided by an embodiment of the present application;

[0068] Figure 14 FIG. 10 is a partial schematic diagram of the vehicle charger provided by an embodiment of the present application;

[0069] Figure 15 FIG. 11 is a partial schematic diagram of the vehicle charger provided by an embodiment of the present application. DETAILED DESCRIPTION

[0070] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments of the present application.

[0071] For the convenience of understanding, the related technical terms involved in the embodiments of the present application will be explained and described below.

[0072] Vertical: The vertical defined in the embodiments of the present application is not limited to the absolute vertical intersection relationship, and the not-absolute vertical intersection relationship caused by factors such as assembly tolerance, design tolerance, and structure flatness is allowed. A small-angle range error is allowed, for example, within the range of 80 degrees to 100 degrees, which can be understood as a vertical relationship.

[0073] Parallel: The parallel defined in the embodiments of the present application is not limited to absolute parallel, and the definition of the parallel can be understood as substantially parallel, allowing a situation that is not absolutely parallel due to factors such as assembly tolerance, design tolerance, and structure flatness.

[0074] Please refer to Figure 1 , Figure 1 A schematic diagram of an electric vehicle 1 is provided in the embodiments of the present application. In an embodiment, the electric vehicle 1 includes a power assembly 10 and a power battery 20. In an embodiment, the electric vehicle 1 further includes a vehicle frame 30 for mounting the power assembly 10 and the power battery 20. The vehicle frame 30 is a structural framework of the electric vehicle 1 and can bear the load from the internal and external environment of the electric vehicle 1. In the embodiments of the present application, the electric vehicle 1 refers to a wheeled device driven or pulled by a power device. The power battery 20 is used to supply power to the power assembly 10, and the power battery 20 can also be referred to as a battery pack. The power assembly 10 is a power source of the electric vehicle 1, and the power assembly 10 is used to drive the wheels 40 of the electric vehicle 1.

[0075] Please refer to Figure 2 , Figure 2 A schematic diagram of the power assembly 10 is provided in the embodiments of the present application. In an embodiment, the power assembly 10 includes an on-board charger 11, a drive motor 12, and a reducer 13. The on-board charger 11 includes an electrical assembly 300, and the on-board charger 11 is used to charge and discharge the power battery 20 through the electrical assembly 300. The power battery 20 is used to supply power to the drive motor 12, and the drive motor 12 is used to convert the electrical energy transmitted by the power battery 20 into mechanical energy, and then transmit the mechanical energy to the reducer 13 to drive the wheels 40 to rotate.

[0076] In an embodiment, the on-board charger 11 is used to convert alternating current into direct current, and then transmit the direct current to the power assembly 10 for charging, or the on-board charger 11 is used to directly transmit the direct current to the power battery 20 for charging. The alternating current includes commercial power or domestic alternating current.

[0077] In an embodiment, the on-board charger 11 also uses the power battery 20 to supply power to the load of the electric vehicle 1. The load of the electric vehicle 1 includes at least one of a low-voltage storage battery, a vehicle light, a windshield wiper, an air conditioner, a sound system, a universal serial bus interface, an instrument panel, and a control display screen, and the low-voltage storage battery can also supply power to the remaining load of the electric vehicle 1.

[0078] In an embodiment, the power assembly 10 further includes a motor controller, and the motor controller is used to convert the direct current transmitted by the power battery 20 into alternating current and transmit the alternating current to the drive motor 12.

[0079] In the working process of the power assembly 10, the electrical components 300 of the on-board charger 11 generate heat. If the cooling efficiency is low, the temperature of the electrical components 300 may be too high, which may cause the electrical components 300 to face the risk of over-temperature aging failure, and affect the working efficiency of the on-board charger 11 and the power assembly 10.

[0080] The cooling mode of the on-board charger 11 is improved in the embodiments of the present application, so that the heat dissipation efficiency can be improved, and the normal operation of the on-board charger 11 and the power assembly 10 can be ensured.

[0081] Please refer to Figures 2 to 5 . Figure 3 The partial exploded view of the on-board charger 11 provided in the embodiments of the present application, Figure 4 The schematic view of the on-board charger 11 provided in the embodiments of the present application, Figure 5 The schematic view of the on-board charger 11 provided in the embodiments of the present application. It should be noted that, Figure 4 and Figure 5 only the positional relationship of the devices in the on-board charger 11 is schematically shown, and the specific size, shape and structure thereof are not represented. In addition, Figure 4 the first communication hole and the water inlet flow channel of the shell are hidden, Figure 5 the second communication hole and the water outlet flow channel of the shell are hidden.

[0082] The on-board charger 11 provided in the embodiments of the present application includes a cover plate 100 and a containing groove 200. The cover plate 100 is used to enclose the containing groove 200 along a first direction A, and the containing groove 200 is used to contain the electrical components 300 of the on-board charger 11.

[0083] The three-dimensional water cooling circuit of the on-board charger 11 includes a first water cooling heat sink 400, a second water cooling heat sink 500, a shell water inlet flow channel 600 and a shell water outlet flow channel 700. At least one of the first water cooling heat sink 400 or the second water cooling heat sink 500 receives cooling water through the shell water inlet flow channel 600, and at least one of the first water cooling heat sink 400 or the second water cooling heat sink 500 outputs cooling water through the shell water outlet flow channel 700.

[0084] The shell water inlet flow channel 600 and the shell water outlet flow channel 700 are distributed on the outside of the containing groove 200. The first water cooling heat sink 400 and the second water cooling heat sink 500 are arranged in layers along the first direction A, the electrical components 300 of the on-board charger 11 are arranged between the first water cooling heat sink 400 and the second water cooling heat sink 500, and the second water cooling heat sink 500 is arranged between the circuit board 301 of the on-board charger 11 and the groove bottom of the containing groove 200.

[0085] In the embodiment of the present application, the cover plate 100 is stacked in the first direction A in the accommodating groove 200, and the cover plate 100 and the shell jointly play a role of accommodating and protecting the plurality of electrical components 300 of the vehicle charger 11. Among them, the electrical components 300 are used for charging and discharging the power battery 20, which means that the electrical components 300 can process and transfer electrical energy to the power battery 20, and can also process and transfer the electrical energy of the power battery 20 to the load of the electric vehicle 1. In an embodiment, the role of the electrical components 300 includes at least one of filtering, energy storage, rectification, inversion, and voltage conversion.

[0086] In the embodiment of the present application, part of the electrical components 300 has a high loss density and generates a large amount of heat during work. The high-loss-density electrical components 300 generate heat, which not only reduces their own work efficiency, but also causes the temperature of the air in the accommodating groove 200 to rise, so that the electrical components 300 with a lower temperature resistance level are also negatively affected in the accommodating groove 200. Among them, the loss density refers to the energy loss density in the working process, and the temperature resistance level refers to the maximum allowable working temperature.

[0087] To solve the above problems, in the embodiment of the present application, the electrical components 300 are arranged between the first water-cooled heat sink 400 and the second water-cooled heat sink 500 in the first direction A. The cooling water in the first water-cooled heat sink 400 and the second water-cooled heat sink 500 can cool the electrical components 300 from different angles, achieving three-dimensional cooling of the electrical components 300, which is beneficial to expand the cooling range of the cooling water on the electrical components 300 and avoid the problem of local insufficient cooling. In an embodiment, the cooling water in the first water-cooled heat sink 400 and the second water-cooled heat sink 500 can also cool the electrical components 300 at different positions respectively.

[0088] In the embodiment of the present application, the first water-cooled heat sink 400 and the second water-cooled heat sink 500 can also achieve indirect cooling of the electrical components 300. Specifically, when the high-loss-density electrical components 300 generate heat and cause the temperature in the accommodating groove 200 to rise, the heated air expands in volume and decreases in density, causing the hot air to flow upward to the cover plate 100. The first water-cooled heat sink 400 and the second water-cooled heat sink 500 are located on the side of the groove bottom of the accommodating groove 200 facing the cover plate 100 in the first direction A, and the first water-cooled heat sink 400 and the second water-cooled heat sink 500 exchange heat with the hot air, taking away the heat in the air, which is beneficial to reduce the temperature in the accommodating groove, so that the electrical components with high heat generation or low temperature resistance level are in a suitable temperature environment, thereby effectively improving the heat dissipation efficiency. If the first water-cooled heat sink 400 and the second water-cooled heat sink 500 are integrated on the groove bottom of the accommodating groove 200, it will be difficult for the first water-cooled heat sink 400 and the second water-cooled heat sink 500 to cool the rising hot air, and the cooling effect of the air in the accommodating groove is limited.

[0089] In the embodiment of the present application, the three-dimensional water cooling circuit of the vehicle charger 11 further comprises a housing water inlet channel 600 and a housing water outlet channel 700. The housing water inlet channel 600 and the housing water outlet channel 700 are distributed on the outside of the accommodating groove 200, facilitating the inspection of the communication condition and not occupying the internal space of the accommodating groove 200. The housing water inlet channel 600 and the housing water outlet channel 700 are respectively used to realize the input and output of the cooling water in the vehicle charger 11, indicating that the cooling water in the first water cooling heat sink 400 and the second water cooling heat sink 500 is in a state of continuous flow and update, which is conducive to enhancing the cooling effect of the first water cooling heat sink 400 and the second water cooling heat sink 500 on the electrical components 300.

[0090] In an embodiment, the housing water inlet channel 600 and the housing water outlet channel 700 are used to communicate with the cooling system located outside the vehicle charger 11, and the external cooling system is used to realize the circulating flow of the cooling water in the first water cooling heat sink 400 and the second water cooling heat sink 500.

[0091] In an embodiment, the communication relationship between the first water cooling heat sink 400, the second water cooling heat sink 500 and the housing water inlet channel 600 can include the following cases: one of the first water cooling heat sink 400 or the second water cooling heat sink 500 is used to receive the cooling water in the housing water inlet channel 600 and deliver the cooling water to the other of the first water cooling heat sink 400 or the second water cooling heat sink 500. Alternatively, the first water cooling heat sink 400 and the second water cooling heat sink 500 are both used to receive the cooling water in the housing water inlet channel 600. In an embodiment, the communication relationship between the first water cooling heat sink 400, the second water cooling heat sink 500 and the housing water outlet channel 700 can include the following cases: one of the first water cooling heat sink 400 or the second water cooling heat sink 500 is used to receive the cooling water transmitted by the other of the first water cooling heat sink 400 or the second water cooling heat sink 500 and output the cooling water to the housing water outlet channel 700. Alternatively, the first water cooling heat sink 400 and the second water cooling heat sink 500 are both used to output the cooling water to receive the housing water outlet channel 700. It can be understood that the above-mentioned communication relationship between the first water cooling heat sink 400, the second water cooling heat sink 500 and the housing water inlet channel 600 can be combined with the above-mentioned communication relationship between the first water cooling heat sink 400, the second water cooling heat sink 500 and the housing water outlet channel 700 according to the actual situation.

[0092] In an embodiment, the cooling water can also be cooling liquid or cooling oil.

[0093] Please continue to refer to Figures 3 to 5In an embodiment, the first water-cooled heat sink 400 comprises a first communication hole 411 and a second communication hole 412. The first water-cooled heat sink 400 is configured to receive the cooling water from the shell water inlet channel 600 through the first communication hole 411, and the first water-cooled heat sink 400 is configured to output the cooling water to the shell water outlet channel 700 through the second communication hole 412. The second water-cooled heat sink 500 is configured to receive and output the cooling water through the first water-cooled heat sink 400.

[0094] In an embodiment, the first communication hole 411 and the second communication hole 412 are respectively arranged through the first water-cooled heat sink 400 along the first direction A, and the opening direction of the first communication hole 411 and the opening direction of the second communication hole 412 are opposite to the opening direction of the accommodating groove 200.

[0095] In an embodiment, the first water-cooled heat sink 400 and the second water-cooled heat sink 500 are both connected to the shell water inlet channel 600 through the first communication hole 411 and connected to the shell water outlet channel 700 through the second communication hole 412. The first communication hole 411 and the second communication hole 412 are arranged on the first water-cooled heat sink 400, which is beneficial to simplify the structure of the three-dimensional water-cooled circuit of the vehicle-mounted charger 11. In addition, the first water-cooled heat sink 400 and the second water-cooled heat sink 500 can be designed in series, parallel, or mixed cooling form according to the heat dissipation requirements of different electrical components 300, thereby improving the practicability of the first water-cooled heat sink 400 and the second water-cooled heat sink 500.

[0096] In an embodiment, the cooling water with a relatively low temperature in the shell water inlet channel 600 flows into the first water-cooled heat sink 400 through the first communication hole 411, and the first water-cooled heat sink 400 is farther away from the groove bottom of the accommodating groove 200 than the second water-cooled heat sink 500, which is beneficial to heat exchange between the cooling water with a relatively low temperature in the first water-cooled heat sink 400 and the hot air rising in the accommodating groove 200, thereby reducing the temperature in the accommodating groove 200.

[0097] In an embodiment, the opening direction of the first communication hole 411 and the opening direction of the second communication hole 412 are parallel to the stacking direction of the cover plate 100 and the accommodating groove 200, which is beneficial to reduce the processing difficulty of the first communication hole 411 and the second communication hole 412. In an embodiment, the vehicle-mounted charger 11 itself occupies a certain space in the first direction A, and the opening direction of the first communication hole 411 and the opening direction of the second communication hole 412 are opposite to the opening direction of the accommodating groove 200, which is beneficial to layout the shell water inlet channel 600 and the shell water outlet channel 700 on the outer peripheral side of the accommodating groove 200, thereby controlling the length of the vehicle-mounted charger 11 in the first direction A and realizing the miniaturization design of the vehicle-mounted charger 11.

[0098] Please refer to Figure 3 , Figures 6 to 8 ,Figure 6 FIG. 11 is a partial schematic view of a vehicle charger 11 according to an embodiment of the present application, Figure 7 FIG. 11 is a partial schematic view of a vehicle charger 11 according to an embodiment of the present application, Figure 8 FIG. 11 is a partial schematic view of a vehicle charger 11 according to an embodiment of the present application. In this embodiment, Figures 6 to 8 The dashed arrow in FIG. 11 indicates the flow direction of the cooling water.

[0099] In one embodiment, the first water-cooled heat sink 400 further includes a third communication hole 413, a fourth communication hole 414, a first partition protrusion 421, and a second partition protrusion 422. The third communication hole 413 is used to communicate the inlet of the second water-cooled heat sink 500 and the first water-cooled heat sink 400, and the fourth communication hole 414 is used to communicate the outlet of the second water-cooled heat sink 500 and the first water-cooled heat sink 400.

[0100] The first partition protrusion 421 and the second partition protrusion 422 are used to divide the flow channel of the first water-cooled heat sink 400 into a first heat sink flow channel 431 and a second heat sink flow channel 432. The first heat sink flow channel 431 and the second heat sink flow channel 432 are used to be communicated through a shunt flow channel 800 distributed in the gap between the first partition protrusion 421 and the second partition protrusion 422. The first communication hole 411 and the third communication hole 413 are used to communicate the first heat sink flow channel 431, and the second communication hole 412 and the fourth communication hole 414 are used to communicate the second heat sink flow channel 432.

[0101] In the embodiment of the present application, the third communication hole 413 and the fourth communication hole 414 are used to communicate the first water-cooled heat sink 400 and the second water-cooled heat sink 500. In one embodiment, the openings of the third communication hole 413 and the fourth communication hole 414 are oriented towards the second water-cooled heat sink 500 along the first direction A.

[0102] The first partition protrusion 421 and the second partition protrusion 422 are used to divide the flow channel of the first water-cooled heat sink 400 into a first heat sink flow channel 431 and a second heat sink flow channel 432. The first heat sink flow channel 431 and the second heat sink flow channel 432 are used to be communicated through a shunt flow channel 800 distributed in the gap between the first partition protrusion 421 and the second partition protrusion 422. The first communication hole 411 and the third communication hole 413 are used to communicate the first heat sink flow channel 431, and the second communication hole 412 and the fourth communication hole 414 are used to communicate the second heat sink flow channel 432. Figure 6As shown, the cooling water flows into the first water cooling panel flow channel 431 from the first communication hole 411, and is divided into two paths at the flow dividing flow channel 800 between the first partition protrusion 421 and the second partition protrusion 422. One path flows to the second water cooling panel flow channel 432 and the second communication hole 412 in sequence through the flow dividing flow channel 800. The other path flows into the second water cooling panel flow channel 432 after flowing through the third communication hole 413, the second water cooling panel 500, and the fourth communication hole 414 in sequence. The cooling water flowing from the first communication hole 411 to the flow dividing flow channel 800 and the cooling water flowing from the first communication hole 411 to the fourth communication hole 414 form two parallel branches. The cooling water in the two parallel branches converges at the second water cooling panel flow channel 432 and flows to the second communication hole 412, forming a serial branch. The cooling mode of the first water cooling panel 400 and the second water cooling panel 500 is first parallel and then serial.

[0103] In the embodiment of the present application, the first water cooling panel 400 and the second water cooling panel 500 are mixed in series and parallel. The advantages of the serial branch and the parallel branch can be comprehensively utilized. The flow of the cooling water in the serial branch is relatively large, and the serial branch has the advantage of small thermal resistance. The first water cooling panel 400 needs to cool the electrical components 300 and the hot air in the accommodation groove 200. The second water cooling panel flow channel 432 of the first water cooling panel 400 includes a serial branch, which can prevent the temperature of the cooling water in the first water cooling panel 400 from rising too fast, and is beneficial to improving the cooling efficiency of the first water cooling panel 400. The flow of the cooling water in the parallel branch is relatively small, and the parallel branch has the advantage of small flow resistance. The second water cooling panel 500 needs to be connected with the first communication hole 411 and the second communication hole 412 through the first water cooling panel 400. The second water cooling panel 500 includes a parallel branch, which is beneficial to reducing the flow resistance loss of the cooling water between the first water cooling panel 400 and the second water cooling panel 500.

[0104] In the embodiment of the present application, the first partition protrusion 421 and the second partition protrusion 422 divide the first water cooling panel 400 into the first water cooling panel flow channel 431 and the second water cooling panel flow channel 432. The first water cooling panel flow channel 431 and the second water cooling panel flow channel 432 are connected through the flow dividing flow channel 800, so that the cooling water can flow according to the pre-designed series-parallel mixed mode. If the first partition protrusion 421 and the second partition protrusion 422 do not separate the first water cooling panel flow channel 431 and the second water cooling panel flow channel 432, that is, there is no obvious boundary between the first water cooling panel flow channel 431 and the second water cooling panel flow channel 432, it may cause the flow path of the cooling water to be relatively chaotic, and it is difficult to comprehensively utilize the advantages of the serial branch and the parallel branch.

[0105] As Figure 7As shown, in an embodiment, the positions of the first communication hole 411 and the second communication hole 412 relative to the first heat dissipation plate flow channel 431 and the second heat dissipation plate flow channel 432 can be interchanged, i.e., the first communication hole 411 and the third communication hole 413 are used to communicate the second heat dissipation plate flow channel 432, and the second communication hole 412 and the fourth communication hole 414 are used to communicate the first heat dissipation plate flow channel 431. Since the third communication hole 413 and the fourth communication hole 414 are used to communicate the inlet and the outlet of the second water-cooled heat dissipation plate 500 respectively, the positions of the third communication hole 413 and the fourth communication hole 414 change with the positions of the first communication hole 411 and the second communication hole 412. In the embodiment of the present application, after the cooling water flows into the second heat dissipation plate flow channel 432 from the first communication hole 411, it is divided into two paths at the shunt flow channel 800, one of which flows to the first heat dissipation plate flow channel 431 and the second communication hole 412 in sequence through the shunt flow channel 800, and the other of which flows to the first heat dissipation plate flow channel 431 and the second communication hole 412 in sequence after flowing through the third communication hole 413, the second water-cooled heat dissipation plate 500, and the fourth communication hole 414. In this case, a cooling mode of first series connection and then parallel connection is formed in the first water-cooled heat dissipation plate 400 and the second water-cooled heat dissipation plate 500.

[0106] As shown, Figure 8 in an embodiment, by changing the distances between the third communication hole 413, the fourth communication hole 414, the shunt flow channel 800, the first communication hole 411, and the second communication hole 412, and the shapes of the first separation protrusion 421 and the second separation protrusion 422, a cooling mode of front series connection and intermediate parallel connection can also be formed in the first water-cooled heat dissipation plate 400 and the second water-cooled heat dissipation plate 500.

[0107] It should be noted that, Figures 6 to 8 only the series and parallel mixed modes of the first water-cooled heat dissipation plate 400 and the second water-cooled heat dissipation plate 500 are schematically shown, and the dashed arrow only indicates the movement trend of the cooling water, not representing that the cooling water can only flow along the dashed arrow.

[0108] Please continue to refer to Figure 3 and Figure 6 In an embodiment, the first separation protrusion 421 is distributed between the first communication hole 411 and the second communication hole 412, and the second separation protrusion 422 is distributed between the third communication hole 413 and the fourth communication hole 414.

[0109] Among them, the distance between the shunt flow channel 800 and the third communication hole 413 is less than the distance between the shunt flow channel 800 and the first communication hole 411, and the distance between the shunt flow channel 800 and the fourth communication hole 414 is less than the distance between the shunt flow channel 800 and the second communication hole 412.

[0110] In the embodiments of the present application, the first partition protrusion 421 is used to separate the first communication hole 411 and the second communication hole 412, and the second partition protrusion 422 is used to separate the third communication hole 413 and the fourth communication hole 414, which is beneficial to avoid the cooling water from flowing directly from the first communication hole 411 to the second communication hole 412, and to avoid the cooling water from flowing directly from the third communication hole 413 to the fourth communication hole 414.

[0111] In the embodiments of the present application, in the first communication hole 411 and the third communication hole 413, the distance between the shunt flow channel 800 and the third communication hole 413 is relatively close. In the second communication hole 412 and the fourth communication hole 414, the distance between the shunt flow channel 800 and the fourth communication hole 414 is relatively close. The embodiments of the present application are beneficial to prolong the path of the cooling water flowing from the first communication hole 411 to the second communication hole 412, and to increase the time of heat exchange between the cooling water and the heat source.

[0112] Please continue to refer to Figure 3 and Figure 4 In an embodiment, the first water-cooled heat dissipation plate 400 further comprises a plurality of heat dissipation teeth 441 and a plurality of flow guide teeth 442. The first partition protrusion 421 is used to separate the first communication hole 411 and the second communication hole 412 to form a U-shaped flow channel of the second heat dissipation plate flow channel 432. The plurality of heat dissipation teeth 441 are distributed on both sides of the first partition protrusion 421, and the plurality of flow guide teeth 442 are distributed on both sides of the first partition protrusion 421. The length of each flow guide tooth 442 is greater than the length of each heat dissipation tooth 441, and the gap between adjacent two heat dissipation teeth 441 is smaller than the gap between adjacent two flow guide teeth 442.

[0113] In the embodiments of the present application, the length of the heat dissipation tooth 441 is smaller than the length of the flow guide tooth 442, and the heat dissipation tooth 441 is arranged more closely than the flow guide tooth 442, so that the interaction between the cooling water and the heat dissipation tooth 441 is stronger, and the heat dissipation tooth 441 can play a role of disturbing the flow of the cooling water to enhance the heat dissipation effect. The length of the flow guide tooth 442 is greater than the length of the heat dissipation tooth, which is beneficial to the flow of the cooling water along the extension direction of the flow guide tooth 442, and the flow guide tooth 442 can guide the flow direction of the cooling water to realize the uniform distribution of the cooling water flow. The arrangement of the flow guide tooth 442 is less close than the arrangement of the heat dissipation tooth 441, which is beneficial to reduce the flow resistance of the cooling water.

[0114] In the embodiment of the present application, the first partitioning protrusion 421 is used to divide the second heat sink flow channel 432 into a U-shaped flow channel, and is used to divide the first communication hole 411 and the second communication hole 412, which is conducive to prolonging the flow distance of the cooling water between the first communication hole 411 and the second communication hole 412. The second heat sink flow channel 432 is a U-shaped flow channel, which can enhance the cooling efficiency of the series branch contained in the second heat sink flow channel. In the embodiment of the present application, the two sides of the first partitioning protrusion 421 are distributed with heat dissipation teeth 441 and flow guide teeth 442, which is conducive to expanding the coverage of the heat dissipation teeth 441 and the flow guide teeth 442 in the second heat sink flow channel 432, so that the U-shaped second heat sink flow channel 432 can cooperate with the heat dissipation teeth 441 and the flow guide teeth 442. In an embodiment, part of the heat dissipation teeth 441 are distributed on the two sides of the second partitioning protrusion 422, and part of the flow guide teeth 442 are distributed on the two sides of the second partitioning protrusion 422.

[0115] In the embodiment of the present application, the shunt flow channel 800 is relatively close to the fourth communication hole 414 and relatively far from the second communication hole 412, and the second heat sink flow channel 432 is a U-shaped flow channel, which can further prolong the flow distance of the cooling water between the shunt flow channel 800 and the second communication hole 412, and expand the cooling range of the first water-cooled heat sink 400.

[0116] In the embodiment of the present application, according to the functions of the heat dissipation teeth 441 and the flow guide teeth 442, the heat dissipation teeth 441 and the flow guide teeth 442 can be arranged at different positions of the first water-cooled heat sink 400. In an embodiment, the electrical components 300 distributed between the first water-cooled heat sink 400 and the second water-cooled heat sink 500 along the first direction A, the loss density of the electrical components 300 coinciding with the projection part of the heat dissipation teeth 441 along the first direction A is higher than that of other electrical components 300. In an embodiment, the electrical components 300 distributed between the first water-cooled heat sink 400 and the second water-cooled heat sink 500 along the first direction A, the temperature resistance grade of the electrical components 300 coinciding with the projection part of the heat dissipation teeth 441 along the first direction A is lower than that of other electrical components 300. In the embodiment of the present application, the loss density and the temperature resistance grade can both represent the heat dissipation demand of the electrical components 300, and arranging the heat dissipation teeth 441 adjacent to the electrical components 300 with higher loss density and lower temperature resistance grade can use the heat dissipation teeth 441 to cool the electrical components 300 with higher heat dissipation demand. In an embodiment, the end surface of the heat dissipation teeth 441 along the first direction A can be circular, elliptical, square or rhombic. Among them, the circular and elliptical heat dissipation teeth 441 are relatively easy to process, and the square and rhombic heat dissipation teeth 441 have relatively better disturbance effect on the cooling water.

[0117] In an embodiment, the guide fins 442 are adjacent to the corner area of the first water-cooled heat sink 400. In the embodiment of the present application, the corner area is an inflection point on the cooling water flow path, where the flow direction of the cooling water usually changes greatly. Without the guide fins 442 to guide the flow of the cooling water, some of the cooling water may accumulate in the corner area due to the slow flow speed during the turning, forming a flow dead zone, which is not conducive to the uniform distribution of the cooling water in the first water-cooled heat sink 400. The guide fins 442 in the embodiment of the present application can force the cooling water to flow in the extension direction of the guide fins 442, improving the heat dissipation efficiency of the cooling water. In an embodiment, the end surface of the guide fins 442 in the first direction A can be linear, arc-shaped, sickle-shaped, or a combination of the above shapes.

[0118] Please continue to read Figure 3 In an embodiment, at least one of the number, shape, or arrangement of the guide fins 442 or the heat dissipation fins 441 on both sides of the first partition protrusion 421 is different.

[0119] In the embodiment of the present application, the heat dissipation fins 441 on both sides of the first partition protrusion 421 differ in at least one of the number, shape, or arrangement. Alternatively, the guide fins 442 on both sides of the first partition protrusion 421 differ in at least one of the number, shape, or arrangement. Alternatively, the heat dissipation fins 441 on both sides of the first partition protrusion 421 differ in at least one of the number, shape, or arrangement, and the guide fins 442 on both sides of the first partition protrusion 421 differ in at least one of the number, shape, or arrangement.

[0120] In the embodiment of the present application, the second heat sink flow channel 432 is a U-shaped flow channel, i.e., the flow path of the cooling water in the second heat sink flow channel 432 is approximately U-shaped, and the temperature and cooling effect of the cooling water at both ends of the U-shaped flow channel differ. The layout of the heat dissipation fins 441 and the guide fins 442 is adjusted in the embodiment of the present application, which is conducive to reducing the difference in the heat dissipation efficiency of the cooling water at different positions in the second heat sink flow channel 432.

[0121] Please continue to read Figure 3 and Figure 4 In an embodiment, the first water-cooled heat sink 400 is integrated on the surface of the cover plate 100 facing away from the accommodation groove 200 in the first direction A. The cover plate 100 includes a sealing plate 110 distributed on the outer side of the accommodation groove 200, and the sealing plate 110 is used to cover the first water-cooled heat sink 400.

[0122] In the embodiment of the present application, the first water-cooled heat sink 400 is integrated in the cover plate 100, which is conducive to enhancing the structural strength of the first water-cooled heat sink 400. In addition, the embodiment of the present application can also improve the integration of the vehicle charger 11, which is conducive to realizing the lightweight design of the vehicle charger 11 and optimizing the layout of the power assembly 10.

[0123] In the embodiment of the present application, the air in the accommodating groove 200 expands in volume after being heated and tends to move upward to the cover plate 100. Integrating the first water-cooled heat sink 400 in the cover plate 100 is conducive to heat exchange between the first water-cooled heat sink 400 and the hot air in the accommodating groove 200. In addition, it can also avoid the first water-cooled heat sink 400 occupying the space in the accommodating groove 200, which is conducive to optimizing the layout of the plurality of electrical components 300 in the accommodating groove 200.

[0124] In an embodiment, the heat dissipation teeth 441 and the flow guide teeth 442 are protruded towards the sealing plate 110 along the first direction A, and the heat dissipation teeth 441 and the flow guide teeth 442 are spaced from the sealing plate 110. In the embodiment of the present application, the cooling water located between the heat dissipation teeth 441 or the flow guide teeth 442 can also continue to flow through the gap between the heat dissipation teeth 441 or the flow guide teeth 442 and the sealing plate, which is conducive to reducing the flow resistance of the cooling water.

[0125] In an embodiment, the first water-cooled heat sink 400 includes a flow channel groove 451, and the groove opening of the flow channel groove 451 is directed towards the plurality of electrical components 300 away from the vehicle charger 11 along the first direction A, and the flow channel groove 451 is used to enclose the sealing plate 110. The first communication hole 411, the second communication hole 412, the third communication hole 413, the fourth communication hole 414, the first separation protrusion 421, the second separation protrusion 422, the heat dissipation teeth 441 and the flow guide teeth 442 are distributed on the groove bottom of the flow channel groove 451.

[0126] In the embodiment of the present application, the groove opening of the flow channel groove 451 is directed towards the outside of the accommodating groove 200 along the first direction A, which is conducive to reducing the processing difficulty of the first water-cooled heat sink 400, and also facilitates disassembling the sealing plate 110 to maintain the first water-cooled heat sink 400, thereby reducing the maintenance cost.

[0127] In an embodiment, the sealing plate 110 is in sealing connection with the groove opening of the flow channel groove 451. The embodiment of the present application is conducive to avoiding leakage of the cooling water and improving the utilization rate and heat dissipation effect of the cooling water.

[0128] Please combine Figure 3 and Figure 9 , Figure 9A partial sectional view of the cover plate 100 is provided in the embodiments of the present application. In one embodiment, the first partition protrusion 421 and the second partition protrusion 422 are in contact with the groove bottom of the flow channel groove 451 and the sealing plate 110 along the first direction A respectively, and the length of the shunt flow channel 800 along the first direction A is equal to the distance between the groove bottom of the flow channel groove 451 and the sealing plate 110.

[0129] The embodiments of the present application fix the first partition protrusion 421 and the second partition protrusion 422 by the groove bottom of the flow channel groove 451 and the sealing plate 110, which is conducive to strengthening the structural strength of the first partition protrusion 421 and the second partition protrusion 422 and ensuring that the first partition protrusion 421 and the second partition protrusion 422 stably play the roles of shunting and guiding flow.

[0130] In one embodiment, the first partition protrusion 421 and the second partition protrusion 422 are integrally formed with the cover plate 100. The embodiments of the present application are conducive to increasing the structural strength of the first partition protrusion 421 and the second partition protrusion 422, so that the first partition protrusion 421 and the second partition protrusion 422 can stably shunt the cooling water.

[0131] In one embodiment, at least one of the first partition protrusion 421 or the second partition protrusion 422 is in a separate structure with the cover plate 100, and at least one of the first partition protrusion 421 or the second partition protrusion 422 is detachably connected with the cover plate 100. The embodiments of the present application make the disassembly and assembly of the first partition protrusion 421 and the second partition protrusion 422 more flexible and convenient, and the positions and layouts of the first partition protrusion 421 and the second partition protrusion 422 in the first water-cooled heat sink 400 can be adjusted according to actual needs.

[0132] In one embodiment, at least one of the first partition protrusion 421 or the second partition protrusion 422 can rotate relative to the groove bottom of the flow channel groove 451. The embodiments of the present application are conducive to adjusting the flow of the cooling water in the first water-cooled heat sink 400 and the second water-cooled heat sink 500 by changing the area size of the first heat sink flow channel 431 and the second heat sink flow channel 432.

[0133] In one embodiment, the second partition protrusion 422 can stretch and contract in the direction of approaching or moving away from the first partition protrusion 421. In one embodiment, the first partition protrusion 421 can stretch and contract in the direction of approaching or moving away from the second partition protrusion 422. The embodiments of the present application are conducive to adjusting the flow of the cooling water in the first water-cooled heat sink 400 and the second water-cooled heat sink 500 by changing the inner diameter size of the shunt flow channel 800.

[0134] In an embodiment, the on-board charger 11 further comprises a multi-way valve, and the shunt flow channel 800 between the first partition protrusion 421 and the second partition protrusion 422 is used to accommodate the multi-way valve, which is used to divide the cooling water from one of the first radiator flow channel 431 or the second radiator flow channel 432 into multiple branches.

[0135] In an embodiment, the first water-cooled radiator 400 is die-cast on the cover plate 100. In an embodiment, the first partition protrusion 421, the second partition protrusion 422, the radiating teeth 441, and the flow guide teeth 442 are integrally die-cast with the groove bottom of the flow channel groove 451. In the embodiment of the present application, the die-casting process is suitable for processing complex structures. The die-casting process is selected to die-cast the first partition protrusion 421, the second partition protrusion 422, the radiating teeth 441, and the flow guide teeth 442, which can reduce the processing difficulty of the first water-cooled radiator 400.

[0136] In an embodiment, the second water-cooled radiator comprises two sheet metal parts, which are stacked along the first direction, and the edges of the two sheet metal parts are sealed by brazing. In the embodiment of the present application, the second water-cooled radiator adopts the brazing process, which is beneficial to reduce the cost and realize the lightweight design of the second water-cooled radiator.

[0137] Please refer to Figure 10 , Figure 10 The cover plate 100 is provided with a partial cross-sectional view of the embodiment of the present application. In an embodiment, the first partition protrusion 421 and the second partition protrusion 422 are integrally formed. The first partition protrusion 421 and the second partition protrusion 422 are in contact with the groove bottom of the flow channel groove 451 along the first direction A, and the shunt flow channel 800 is distributed in the gap between the first partition protrusion 421 and the second partition protrusion 422 along the first direction A and the sealing plate 110. The length of the shunt flow channel 800 along the first direction A is less than the distance between the groove bottom of the flow channel groove 451 and the sealing plate 110. In an embodiment, the first partition protrusion 421 and the second partition protrusion 422 are in contact with the sealing plate 110 along the first direction A, and the shunt flow channel 800 is distributed in the gap between the first partition protrusion 421 and the second partition protrusion 422 along the first direction A and the groove bottom of the flow channel groove 451. The length of the shunt flow channel 800 along the first direction A is less than the distance between the groove bottom of the flow channel groove 451 and the sealing plate 110.

[0138] The embodiment of the present application utilizes the gap between the first partition protrusion 421 and the second partition protrusion 422 and the sealing plate 110 or the groove bottom of the flow channel groove 451 to form the shunt flow channel 800, which is beneficial to adjust the flow of the cooling water in the first water-cooled radiator 400 and the second water-cooled radiator 500.

[0139] In an embodiment, the first partitioning protrusion 421 and the second partitioning protrusion 422 are integrally formed with the sealing plate 110, and the first partitioning protrusion 421 and the second partitioning protrusion 422 are distributed on the surface of the sealing plate 110 facing the bottom of the flow channel groove 451 in the first direction A. The embodiment is beneficial to enhancing the structural strength of the first partitioning protrusion 421 and the second partitioning protrusion 422.

[0140] Please refer to Figure 3 and Figure 11 , Figure 11 the partial cross-sectional view of the cover plate 100 provided in the embodiment.

[0141] In an embodiment, the bottom of the flow channel groove 451 includes a buffer groove 4511 recessed in the first direction A toward the containing groove 200, and the first communication hole 411 penetrates the bottom of the buffer groove 4511. The area of the opening of the buffer groove 4511 is greater than the area of the bottom of the buffer groove 4511. The peripheral wall of the buffer groove 4511 is inclined from the opening of the buffer groove 4511 to the bottom of the buffer groove 4511. The cross section of the peripheral wall of the buffer groove 4511 in the first direction A is linear, arc-shaped or stepped.

[0142] In the embodiment, the buffer groove 4511 is referred to as the buffer groove 4511a for convenience of description. Since the opening of the first communication hole 411 faces the containing groove 200 in the first direction A, the buffer groove 4511a is recessed in the first direction A toward the containing groove 200, and the first communication hole 411 penetrates the bottom of the buffer groove 4511a, so that the cooling water can flow into the first water-cooled heat dissipation plate 400 from the first communication hole 411 more conveniently, and the path of the cooling water flowing into the first communication hole 411 is shortened. In this case, there is a height difference between the first communication hole 411 and the bottom of the flow channel groove 451 except the buffer groove 4511a, and the peripheral wall of the buffer groove 4511a is used to transition and buffer the cooling water, so as to reduce the flow resistance loss caused by the height difference.

[0143] Please refer to Figure 3 and Figure 11 . In an embodiment, the bottom of the flow channel groove 451 further includes another buffer groove 4511 recessed in the first direction A toward the containing groove 200, and the second communication hole 412 penetrates the bottom of the other buffer groove 4511. The area of the opening of the other buffer groove 4511 is greater than the area of the bottom of the other buffer groove 4511. The peripheral wall of the other buffer groove 4511 is inclined from the opening of the other buffer groove 4511 to the bottom of the other buffer groove 4511. The cross section of the peripheral wall of the other buffer groove 4511 in the first direction A is linear, arc-shaped or stepped.

[0144] In the embodiments of the present application, the other buffer groove 4511 is referred to as buffer groove 4511b for convenience of description. Since the opening of the second communication hole 412 faces the accommodation groove 200 along the first direction A, the buffer groove 4511b is recessed towards the accommodation groove 200 along the first direction A, and the second communication hole 412 penetrates the groove bottom of the buffer groove 4511b, so that the cooling water can more conveniently flow from the second communication hole 412 into the external cooling system or the internal cooling channel. In this case, the second communication hole 412 has a height difference with other parts of the groove bottom of the flow channel groove 451 except the buffer grooves 4511a and 4511b. The embodiments of the present application utilize the groove wall of the buffer groove 4511b to play a role of transition and buffering for the cooling water, and reduce the flow resistance loss caused by the height difference.

[0145] Please continue to refer to Figure 4 In an embodiment, the length of the first water-cooled heat dissipation plate 400 along the second direction B is greater than the length of the second water-cooled heat dissipation plate 500, and the second direction B is perpendicular to the first direction A.

[0146] In the embodiments of the present application, the second direction B is perpendicular to the arrangement direction of the first water-cooled heat dissipation plate 400 and the second water-cooled heat dissipation plate 500, and the length of the first water-cooled heat dissipation plate 400 along the second direction B is greater than the length of the second water-cooled heat dissipation plate 500 along the second direction B, which can increase the contact area of the first water-cooled heat dissipation plate 400 with hot air, and is conducive to reducing the temperature in the accommodation groove 200. In addition, the first water-cooled heat dissipation plate 400 is integrated in the cover plate 100, and the lengthening of the first water-cooled heat dissipation plate 400 in the second direction B will not interfere with the layout of the electrical components 300 in the accommodation groove 200. The second water-cooled heat dissipation plate 500 is located in the accommodation groove 200, and if the length of the second water-cooled heat dissipation plate 500 along the second direction B is too long, it may also need to consider the avoidance problem with the electrical components 300. In an embodiment, the second direction B is the length direction or the width direction of the cover plate 100. In an embodiment, the area of the first water-cooled heat dissipation plate 400 is greater than the area of the second water-cooled heat dissipation plate 500.

[0147] Please continue to refer to Figure 4 and Figure 12 , Figure 12 The schematic diagram of the cover plate 100 provided in the embodiments of the present application is shown. In an embodiment, the surface of the cover plate 100 facing the accommodation groove 200 along the first direction A is used to fix the circuit board 301, and the two surfaces of the cover plate 100 and the circuit board 301 opposite along the first direction A are used to fix the electrical components 300.

[0148] The surface of the cover plate 100 facing the accommodation groove 200 in the first direction A includes a plurality of shielding protrusions 120. The plurality of shielding protrusions 120 protrude towards the groove bottom of the accommodation groove 200 in the first direction A, and each shielding protrusion 120 is used to be embedded in the gap between two adjacent electrical components 300.

[0149] In the embodiment of the present application, the surface of the cover plate 100 away from the accommodation groove 200 is integrated with the first water-cooled heat dissipation plate 400, and the surface of the cover plate 100 facing the accommodation groove 200 is used to fix the electrical components 300. In this way, the path of heat transmission between the electrical components 300 and the first water-cooled heat dissipation plate 400 can be shortened without occupying the space of the accommodation groove 200 by the first water-cooled heat dissipation plate 400, and the risk of cooling water leakage can be reduced. In the embodiment of the present application, each shielding protrusion 120 of the cover plate 100 is embedded between two adjacent electrical components 300, which can play an electromagnetic shielding role for the electrical components 300 on both sides of the shielding protrusion 120, and improve the electromagnetic compatibility.

[0150] In an embodiment, the surface of the cover plate 100 facing the accommodation groove 200 in the first direction A includes a plurality of fixing protrusions 130, and the plurality of fixing protrusions 130 protrude towards the groove bottom of the accommodation groove 200 in the first direction A. The fixing protrusions 130 are used to fix the electrical components 300. In the embodiment of the present application, the fixing protrusions 130 are part of the cover plate 100, and the fixing protrusions 130 fix the electrical components 300, which is equivalent to that the cover plate 100 directly contacts the electrical components, and is conducive to increasing the heat exchange efficiency.

[0151] In an embodiment, the projection of at least one electrical component 300 in the first direction A coincides with the projection of the first water-cooled heat dissipation plate 400.

[0152] In an embodiment, the plurality of electrical components 300 can include magnetic devices 310 and capacitors 320, and the magnetic devices 310 and the capacitors 320 are arranged between the cover plate 100 and the circuit board 301 in the first direction A. In the embodiment of the present application, the first water-cooled heat dissipation plate 400 integrated with the cover plate 100 includes a series branch, and the thermal resistance of the series branch is small, which can enhance the cooling effect of the first water-cooled heat dissipation plate 400 on the magnetic devices 310 and the capacitors 320. In an embodiment, the magnetic devices 310 include transformers and inductors.

[0153] In an embodiment, as Figure 4As shown, the plurality of electrical components 300 can further include power switching tubes 330, and the circuit board 301 is used to fix the power switching tubes 330 along the surface of the second water-cooled heat sink 500 in the first direction A, and the power switching tubes 330 are distributed between the circuit board 301 and the second water-cooled heat sink 500. In the embodiment of the present application, the cooling water in the second water-cooled heat sink 500 can dissipate heat for the power switching tubes 330. The power switching tubes 330 are used to participate in the power conversion process of the vehicle charger 11, and the power switching tubes 330 are more susceptible to vibration than the magnetic devices 310 and the capacitors 320. The distance between the power switching tubes 330 and the cover plate 100 in the first direction A is greater than the distance between the magnetic devices 310, the capacitors 320 and the cover plate 100, and the power switching tubes 330 are not distributed on the surface of the cover plate 100 facing the accommodating groove 200, which can avoid the cover plate 100 directly transmitting the vibration from the outside to the power switching tubes 330, ensure the normal work of the power switching tubes 330, and reduce the amount of heat generated.

[0154] Please continue to refer to Figure 3 and Figure 12 In an embodiment, the surface of the cover plate 100 facing the accommodating groove 200 in the first direction A further includes a first communication interface 140 and a second communication interface 150. The surface of the second water-cooled heat sink 500 facing the cover plate 100 in the first direction A is used to fix the first communication interface 140 and the second communication interface 150. The first communication interface 140 and the second communication interface 150 are distributed on the inner side of the accommodating groove 200. The first communication interface 140 is used to communicate the third communication hole 413 and the inlet of the flow channel of the second water-cooled heat sink 500, and the second communication interface 150 is used to communicate the fourth communication hole 414 and the outlet of the flow channel of the second water-cooled heat sink 500.

[0155] In the embodiment of the present application, the first communication interface 140 and the second communication interface 150 are used to communicate the first water-cooled heat sink 400 and the second water-cooled heat sink 500. The first communication interface 140 and the second communication interface 150 are integrated in the cover plate 100 and fixed with the second water-cooled heat sink 500, which can increase the structural stability of the first communication interface 140 and the second communication interface 150, and also help to avoid the leakage of the cooling water during the flow process between the first water-cooled heat sink 400 and the second water-cooled heat sink 500.

[0156] In the embodiment of the present application, the first communication interface 140 and the second communication interface 150 are located in the accommodation groove 200, and the first communication interface 140 and the second communication interface 150 are spaced from the groove wall of the accommodation groove 200. If the first communication interface 140 and the second communication interface 150 are integrated on the groove wall of the accommodation groove 200, the overall thickness of the groove wall will be increased, which is not conducive to the lightweight design of the vehicle charger 11, and will also increase the processing difficulty and cost of the accommodation groove 200. The first communication interface 140 and the second communication interface 150 in the embodiment of the present application are in a split structure with the accommodation groove 200, which can avoid negative effects on the processing of the accommodation groove 200.

[0157] Please refer to Figure 3 and Figure 4 In an embodiment, the groove wall of the accommodation groove 200 includes a first groove wall 210 and a second groove wall 220. The first groove wall 210 and the second groove wall 220 are arranged opposite to each other along a second direction B, and the second direction B is perpendicular to the first direction A.

[0158] In the embodiment of the present application, the first communication hole 411 and the second communication hole 412 are adjacent to the first groove wall 210 of the accommodation groove 200, so that the first communication hole 411 and the second communication hole 412 are arranged compactly. The first communication hole 411 and the second communication hole 412 are adjacent to the first groove wall 210 of the accommodation groove 200, which facilitates the communication of the first communication hole 411 and the second communication hole 412 with the shell water inlet flow channel 600 and the shell water outlet flow channel 700 distributed outside the accommodation groove 200.

[0159] In the embodiment of the present application, the first communication hole 411 and the second communication hole 412 are adjacent to the first groove wall 210 of the accommodation groove 200, so that the first communication hole 411 and the second communication hole 412 are arranged compactly. The first communication hole 411 and the second communication hole 412 are adjacent to the first groove wall 210 of the accommodation groove 200, which facilitates the communication of the first communication hole 411 and the second communication hole 412 with the shell water inlet flow channel 600 and the shell water outlet flow channel 700 distributed outside the accommodation groove 200.

[0160] Please refer to Figure 5 In an embodiment, the outlet of the shell water inlet flow channel 600 is used to communicate with the first communication hole 411, and the orientation of the outlet of the shell water inlet flow channel 600 is the same as the orientation of the slot of the accommodation groove 200.

[0161] In the embodiment of the present application, the first communication hole 411 and the second communication hole 412 are adjacent to the first groove wall 210 of the accommodation groove 200, so that the first communication hole 411 and the second communication hole 412 are arranged compactly. The first communication hole 411 and the second communication hole 412 are adjacent to the first groove wall 210 of the accommodation groove 200, which facilitates the communication of the first communication hole 411 and the second communication hole 412 with the shell water inlet flow channel 600 and the shell water outlet flow channel 700 distributed outside the accommodation groove 200.

[0162] In this embodiment, the flow channel connecting component 900 is used to connect the outlet of the housing water inlet flow channel 600 with the first connecting hole 411 of the first water-cooled heat sink 400. Both the housing water inlet flow channel 600 and the flow channel connecting component 900 are located on the outside of the receiving groove 200 for easy inspection of the connection. One end of the flow channel connecting component 900 covers the first connecting hole 411, and the other end is embedded in the outlet of the housing water inlet flow channel 600, which helps to prevent cooling water leakage at the connection between the flow channel connecting component 900, the housing water inlet flow channel 600, and the cover plate 100.

[0163] Please continue reading. Figure 4 In one embodiment, the inlet of the housing water outlet channel 700 is used to receive cooling water output from the first water-cooled heat sink 400, and the outlet of the housing water outlet channel 700 is used to discharge the cooling water from the on-board charger 11.

[0164] The inlet of the shell outlet channel 700 is located on the wall of the receiving tank 200, and the outlet of the shell outlet channel 700 is located on the outside of the receiving tank 200. The orientation of the inlet of the shell outlet channel 700 is opposite to the orientation of the second connecting hole 412, which is embedded in the inlet of the shell outlet channel 700. The orientation of the outlet of the shell outlet channel 700 intersects with the orientation of the inlet of the shell outlet channel 700.

[0165] In this embodiment, the first water-cooled heat dissipation plate 400 is integrated into the cover plate 100, and the cover plate 100 and the receiving groove 200 are stacked along the first direction A. The inlet of the housing water outlet channel 700 is located on the groove wall of the receiving groove 200, and the orientation of the inlet of the housing water outlet channel 700 is opposite to the orientation of the second connecting hole 412, which helps to shorten the transmission distance of cooling water between the second connecting hole 412 and the housing water outlet channel 700. The outlet of the housing water outlet channel 700 is located on the outside of the receiving groove 200, and the second connecting hole 412 is embedded in the inlet of the housing water outlet channel 700, which can prevent high-temperature cooling water from leaking into the receiving groove 200. The orientation of the outlet of the housing water outlet channel 700 intersects with the orientation of the inlet of the housing water outlet channel 700, changing the outflow direction of the cooling water from the outlet of the housing water outlet channel 700.

[0166] Please see Figure 13 , Figure 13 This is a schematic diagram of the powertrain 10 provided in an embodiment of this application. It should be noted that... Figure 5 The positional relationship between the receiving slot 200 and the on-board charger 11, drive motor 12 and reducer 13 is shown only schematically and does not represent its specific structure and size.

[0167] In an embodiment, the accommodating groove 200 of the on-board charger 11 is an integrated shell. The accommodating groove 200 includes a power supply cavity 230 for accommodating the on-board charger 11, a motor cavity 240 for accommodating the driving motor 12, and a reducer cavity 250 for accommodating the reducer 13.

[0168] In the embodiment, the on-board charger 11 is applied to the power assembly 10, and the accommodating groove 200 of the on-board charger 11 is used to accommodate the on-board charger 11, the driving motor 12, and the reducer 13 of the power assembly 10, which is conducive to improving the integration of the power assembly 10 and reducing the volume of the power assembly 10. In this case, the accommodating groove 200 is an integrated shell, and the bottom wall of the power supply cavity 230 of the accommodating groove 200 needs to be shared with at least one of the motor cavity 240 or the reducer cavity 250. In this case, the first water-cooled heat sink and the second water-cooled heat sink of the embodiment are away from the groove bottom of the accommodating groove, which can reduce the processing difficulty of the first water-cooled heat sink and facilitate the first water-cooled heat sink to communicate with the external cooling system through the first communication hole and the second communication hole. In addition, since the driving motor 12 and the reducer 13 rotate at high speed during operation, if the first water-cooled heat sink is integrated on the bottom wall of the power supply cavity 230, the flow of the cooling water in the first water-cooled heat sink may be disturbed by the driving motor 12 and the reducer 13 due to the close distance between the bottom wall and the driving motor 12 and the reducer 13.

[0169] Please continue to refer to Figures 3 to 6 The embodiment also provides an on-board charger 11. The electrical components 300 of the on-board charger 11 are used to charge and discharge the power battery 20 of the electric vehicle 1. The shell of the on-board charger 11 includes a cover plate 100 and an accommodating groove 200. The cover plate 100 is used to enclose the accommodating groove 200 along a first direction A, and the accommodating groove 200 is used to accommodate the electrical components 300 of the on-board charger 11.

[0170] The three-dimensional water-cooled circuit of the on-board charger 11 includes a first water-cooled heat sink 400, a second water-cooled heat sink 500, a shunt flow channel 800, a shell water inlet flow channel 600, and a shell water outlet flow channel 700. The first water-cooled heat sink 400 and the second water-cooled heat sink 500 are stacked and arranged along the first direction A, and the electrical components 300 of the on-board charger 11 are arranged between the first water-cooled heat sink 400 and the second water-cooled heat sink 500.

[0171] The first water-cooled heat dissipation plate 400 comprises a first partition protrusion 421, a second partition protrusion 422, a first communication hole 411, a second communication hole 412, a third communication hole 413 and a fourth communication hole 414. The first partition protrusion 421 and the second partition protrusion 422 are used to divide the flow channel of the first water-cooled heat dissipation plate 400 into a first heat dissipation plate flow channel 431 and a second heat dissipation plate flow channel 432, and a flow distribution channel 800 is used to communicate the first heat dissipation plate flow channel 431 and the second heat dissipation plate flow channel 432. The first partition protrusion 421 is distributed between the first communication hole 411 and the second communication hole 412, and the second partition protrusion 422 is distributed between the third communication hole 413 and the fourth communication hole 414.

[0172] The first communication hole 411 and the third communication hole 413 are distributed in the first heat dissipation plate flow channel 431, and the second communication hole 412 and the fourth communication hole 414 are distributed in the second heat dissipation plate flow channel 432. The first heat dissipation plate flow channel 431 is used to receive cooling water from the shell water inlet flow channel 600 through the first communication hole 411, and the first heat dissipation plate flow channel 431 is used to deliver the cooling water to the inlet of the flow channel of the second water-cooled heat dissipation plate 500 through the third communication hole 413. The second heat dissipation plate flow channel 432 is used to receive cooling water from the outlet of the flow channel of the second water-cooled heat dissipation plate 500 through the fourth communication hole 414, and the second heat dissipation plate flow channel 432 is used to receive cooling water from the first heat dissipation plate flow channel 431 through the flow distribution channel 800, and the second heat dissipation plate flow channel 432 is used to deliver the cooling water to the shell water outlet flow channel 700 through the second communication hole 412.

[0173] In the embodiment of the present application, part of the electrical components 300 has a high loss density and generates a large amount of heat during the working process. The high-loss-density electrical components 300 generate heat, which not only reduces the working efficiency of the electrical components 300, but also negatively affects the electrical components 300 with a lower temperature resistance level. The loss density refers to the energy loss density in the working process, and the temperature resistance level refers to the maximum allowable working temperature.

[0174] To solve the above problems, the electrical components 300 are arranged between the first water-cooled heat dissipation plate 400 and the second water-cooled heat dissipation plate 500 along the first direction A in the embodiment of the present application. The cooling water in the first water-cooled heat dissipation plate 400 and the second water-cooled heat dissipation plate 500 can cool the electrical components 300 from different angles, achieving three-dimensional cooling of the electrical components 300, which is beneficial to expand the cooling range of the cooling water on the electrical components 300 and avoid the problem of insufficient local cooling.

[0175] In the embodiment of the present application, the shell water inlet flow channel 600 and the shell water outlet flow channel 700 are respectively used to realize the input and output of the cooling water in the vehicle-mounted charger 11, indicating that the cooling water in the first water-cooled heat sink 400 and the second water-cooled heat sink 500 is in a state of continuous flow and update, which is conducive to enhancing the cooling effect of the first water-cooled heat sink 400 and the second water-cooled heat sink 500 on the electrical components 300.

[0176] In the embodiment of the present application, the first water-cooled heat sink 400 and the second water-cooled heat sink 500 are communicated with each other through the third communication hole 413 and the fourth communication hole 414. The first water-cooled heat sink 400 and the second water-cooled heat sink 500 are both communicated with the shell water inlet flow channel 600 through the first communication hole 411 and communicated with the shell water outlet flow channel 700 through the second communication hole 412. The first communication hole 411, the second communication hole 412, the third communication hole 413 and the fourth communication hole 414 are all distributed in the first water-cooled heat sink 400, which is conducive to simplifying the structure of the three-dimensional water-cooled circuit of the vehicle-mounted charger 11. In addition, it is also conducive to designing the first water-cooled heat sink 400 and the second water-cooled heat sink 500 into a mixed cooling form of series and parallel connection according to the heat dissipation demand of the electrical components 300, and improving the practicability of the first water-cooled heat sink 400 and the second water-cooled heat sink 500.

[0177] In the embodiment of the present application, the first separation protrusion 421 and the second separation protrusion 422 are used to separate the first water-cooled heat sink 400 into the first heat sink flow channel 431 and the second heat sink flow channel 432. The first separation protrusion 421, the second separation protrusion 422 and the shunt flow channel 800 are used to realize the mixed design of series and parallel connection in the first water-cooled heat sink 400 and the second water-cooled heat sink 500 in the embodiment of the present application. Specifically, as shown in Figure 6 the cooling water flowing to the second water-cooled heat sink 500, and the other way of the cooling water flowing to the second heat sink flow channel 432. Since the second water-cooled heat sink 500 is communicated with the first water-cooled heat sink 400, therefore, the cooling water flowing to the second water-cooled heat sink 500 will eventually flow back to the second heat sink flow channel 432 from the second water-cooled heat sink 500.

[0178] In the embodiment of the present application, the first water-cooled heat sink 400 and the second water-cooled heat sink 500 are connected in series and in parallel in a mixed manner, which can comprehensively utilize the advantages of the series branch and the parallel branch. The flow of the cooling water in the series branch is relatively large, and the series branch has the advantage of small thermal resistance. The second heat sink flow channel 432 of the first water-cooled heat sink 400 includes a series branch, which can prevent the temperature of the cooling water in the first water-cooled heat sink 400 from rising too fast, and is beneficial to improving the cooling efficiency of the first water-cooled heat sink 400. The flow of the cooling water in the parallel branch is relatively small, and the parallel branch has the advantage of small flow resistance. The second water-cooled heat sink 500 needs to be connected with the shell water inlet flow channel 600 and the shell water outlet flow channel 700 through the first water-cooled heat sink 400, and the second water-cooled heat sink 500 includes a parallel branch, which is beneficial to reducing the flow resistance loss of the cooling water between the first water-cooled heat sink 400 and the second water-cooled heat sink 500.

[0179] In the embodiment of the present application, the first partition protrusion 421 and the second partition protrusion 422 divide the first water-cooled heat sink 400 into the first heat sink flow channel 431 and the second heat sink flow channel 432, and the first heat sink flow channel 431 and the second heat sink flow channel 432 are connected through the shunt flow channel 800, so that the cooling water can flow in the pre-designed series and parallel mixed manner. If the first partition protrusion 421 and the second partition protrusion 422 do not separate the first heat sink flow channel 431 and the second heat sink flow channel 432, that is, there is no obvious boundary between the first heat sink flow channel 431 and the second heat sink flow channel 432, it may cause the flow path of the cooling water to be relatively chaotic, and it is difficult to comprehensively utilize the advantages of the series branch and the parallel branch.

[0180] Please continue to refer to Figures 6 to 8 In an embodiment, the shunt flow channel 800 is distributed in the gap between the first partition protrusion 421 and the second partition protrusion 422.

[0181] In this embodiment, the diversion channel 800 is used to directly connect the first heat sink channel 431 and the second heat sink channel 432. After the cooling water flows into the first heat sink channel 431 from the first connecting hole 411, it splits into two paths at the diversion channel 800. One path of cooling water flows sequentially through the diversion channel 800 to the second heat sink channel 432 and the second connecting hole 412, while the other path flows sequentially through the third connecting hole 413, the second water-cooled heat sink 500, and the fourth connecting hole 414 before also flowing into the second heat sink channel 432. The cooling water flowing from the first connecting hole 411 to the diversion channel 800 and from the first connecting hole 411 to the fourth connecting hole 414 forms two parallel branches. The cooling water from the two parallel branches merges in the second heat sink channel 432 and flows into the second connecting hole 412, forming a series branch. This creates a cooling method of first parallel and then series connection in the first water-cooled heat sink 400 and the second water-cooled heat sink 500. In this embodiment, the flow channel 800 is integrated into the first water-cooled heat sink 400, which helps to simplify the overall structure of the three-dimensional water-cooled circuit of the vehicle charger 11 while realizing the series-parallel design.

[0182] like Figure 7 As shown, in one embodiment, the positions of the first connecting hole 411 and the second connecting hole 412 relative to the first heat sink channel 431 and the second heat sink channel 432 are interchangeable. That is, the first connecting hole 411 and the third connecting hole 413 are used to connect the second heat sink channel 432, and the second connecting hole 412 and the fourth connecting hole 414 are used to connect the first heat sink channel 431. Since the third connecting hole 413 and the fourth connecting hole 414 are used to connect the inlet and outlet of the second water-cooled heat sink 500, respectively, the positions of the third connecting hole 413 and the fourth connecting hole 414 change with the positions of the first connecting hole 411 and the second connecting hole 412. In this embodiment, after the cooling water flows into the second heat sink channel 432 from the first connecting hole 411, it splits into two paths at the branch channel 800. One path of cooling water flows sequentially through the branch channel 800 to the first heat sink channel 431 and the second connecting hole 412, while the other path flows sequentially through the third connecting hole 413, the second water-cooled heat sink 500, and the fourth connecting hole 414 before also flowing sequentially to the first heat sink channel 431 and the second connecting hole 412. In this case, a cooling method of first series connection followed by parallel connection is formed between the first water-cooled heat sink 400 and the second water-cooled heat sink 500.

[0183] like Figure 8 As shown, in one embodiment, by changing the distances between the third connecting hole 413 and the fourth connecting hole 414 and the diversion channel 800, the first connecting hole 411, and the second connecting hole 412, as well as the shapes of the first dividing protrusion 421 and the second dividing protrusion 422, a cooling method of front-to-back series connection and middle-parallel connection can also be formed in the first water-cooled heat sink 400 and the second water-cooled heat sink 500.

[0184] Referring to Figure 14 , Figure 14 A partial schematic view of the vehicle charger 11 is provided in an embodiment of the present application. In an embodiment, the shunt flow channel 800 is distributed between the inlet of the flow channel of the second water-cooled heat sink 500 and the outlet of the flow channel of the second water-cooled heat sink 500. The inlet of the shunt flow channel 800 is configured to communicate the first heat sink flow channel 431 through the inlet of the flow channel of the second water-cooled heat sink 500, and the outlet of the shunt flow channel 800 is configured to communicate the second heat sink flow channel 432 through the outlet of the flow channel of the second water-cooled heat sink 500.

[0185] In an embodiment of the present application, compared with Figure 6 , Figure 14 The position of the shunt flow channel 800 is changed in the embodiment. The cooling water flows through the first heat sink flow channel 431 and the inlet of the second water-cooled heat sink 500 in sequence from the first communication hole 411, and is divided into two paths at the shunt flow channel 800. One path of the cooling water flows to the fourth communication hole 414 and the second heat sink flow channel 432 in sequence through the shunt flow channel 800, and the other path of the cooling water also flows into the second heat sink flow channel 432 after flowing through the flow channel of the second water-cooled heat sink 500. In an embodiment of the present application, the range of the series branch extends from the second heat sink flow channel 432 to the second water-cooled heat sink 500, which is beneficial to the cooling efficiency of the second water-cooled heat sink 500 on the electrical components 300.

[0186] Referring to Figure 15 , Figure 15 A partial schematic view of the vehicle charger 11 is provided in an embodiment of the present application. In an embodiment, the first water-cooled heat sink 400 includes a first communication interface 140 and a second communication interface 150 facing the surface of the second water-cooled heat sink 500 in a first direction A. The surface of the second water-cooled heat sink 500 facing the first water-cooled heat sink 400 in the first direction A is configured to fix the first communication interface 140 and the second communication interface 150. The first communication interface 140 is configured to communicate the third communication hole 413 and the inlet of the flow channel of the second water-cooled heat sink 500, and the second communication interface 150 is configured to communicate the fourth communication hole 414 and the outlet of the flow channel of the second water-cooled heat sink 500.

[0187] The shunt flow channel 800 is distributed between the first communication interface 140 and the second communication interface 150. The inlet of the shunt flow channel 800 is configured to communicate the first heat sink flow channel 431 through the first communication interface 140, and the outlet of the shunt flow channel 800 is configured to communicate the second heat sink flow channel 432 through the second communication interface 150.

[0188] In the embodiment of the present application, the first communication interface 140 and the second communication interface 150 are used to communicate the first water-cooled heat sink 400 and the second water-cooled heat sink 500. The first communication interface 140 and the second communication interface 150 are integrated in the first water-cooled heat sink 400 and fixed with the second water-cooled heat sink 500, which can increase the structural stability of the first communication interface 140 and the second communication interface 150, and also facilitate to avoid the leakage of cooling water during the flow between the first water-cooled heat sink 400 and the second water-cooled heat sink 500.

[0189] In the embodiment of the present application, the shunt flow channel 800 is distributed between the first communication interface 140 and the second communication interface 150, and arranged between the first water-cooled heat sink 400 and the second water-cooled heat sink 500 along the first direction A, which can realize the three-side heat dissipation of the electrical component 300. Part of the second communication interface 150 is used to constitute a series branch, which facilitates to improve the cooling efficiency of the second communication interface 150 on the electrical component 300.

[0190] In the embodiment of the present application, the three-dimensional water-cooled circuit of the vehicle-mounted charger can include a plurality of shunt flow channels, and the plurality of shunt flow channels are arranged at different positions according to the actual heat dissipation requirement of the electrical component. In an embodiment, at least one shunt flow channel is distributed in the gap between the first separation protrusion and the second separation protrusion, and at least one shunt flow channel is distributed between the inlet of the flow channel of the second water-cooled heat sink and the outlet of the flow channel of the second water-cooled heat sink.

[0191] In an embodiment, at least one shunt flow channel is distributed in the gap between the first separation protrusion and the second separation protrusion, and at least one shunt flow channel is distributed between the first communication interface and the second communication interface.

[0192] In an embodiment, at least one shunt flow channel is distributed between the inlet of the flow channel of the second water-cooled heat sink and the outlet of the flow channel of the second water-cooled heat sink, and at least one shunt flow channel is distributed between the first communication interface and the second communication interface.

[0193] In an embodiment, at least one shunt flow channel is distributed in the gap between the first separation protrusion and the second separation protrusion, at least one shunt flow channel is distributed between the inlet of the flow channel of the second water-cooled heat sink and the outlet of the flow channel of the second water-cooled heat sink, and at least one shunt flow channel is distributed between the first communication interface and the second communication interface.

[0194] It should be noted that, Figure 14 and Figure 15 Only the series and parallel mixed mode of the first water-cooled heat sink 400 and the second water-cooled heat sink 500 is schematically shown, and the dashed arrow only represents the movement trend of the cooling water, not representing that the cooling water can only flow along the dashed arrow.

[0195] Please continue to readFigure 3 and Figure 4 In an embodiment, the first water-cooled heat dissipation plate 400 further comprises a plurality of heat dissipation fins 441 and a plurality of flow guide fins 442.

[0196] The first partition protrusion 421 is used for partitioning the first communication hole 411 and the second communication hole 412. The plurality of heat dissipation fins 441 are distributed on both sides of the first partition protrusion 421, and the plurality of flow guide fins 442 are distributed on both sides of the first partition protrusion 421. The length of each flow guide fin 442 is greater than the length of each heat dissipation fin 441, and the gap between adjacent two heat dissipation fins 441 is smaller than the gap between adjacent two flow guide fins 442.

[0197] In the embodiment of the present application, the length of the heat dissipation fin 441 is smaller than the length of the flow guide fin 442, and the heat dissipation fin 441 is arranged more closely than the flow guide fin 442, so that the interaction between the cooling water and the heat dissipation fin 441 is stronger, and the heat dissipation fin 441 can play a spoiler role on the cooling water to enhance the heat dissipation effect. The length of the flow guide fin 442 is greater than the length of the heat dissipation fin, which facilitates the flow of the cooling water along the extension direction of the flow guide fin 442, and the flow guide fin 442 can guide the flow direction of the cooling water to achieve uniform distribution of the cooling water flow. The arrangement of the flow guide fin 442 is less close than the arrangement of the heat dissipation fin 441, which is conducive to reducing the flow resistance of the cooling water. Integrating the plurality of heat dissipation fins 441 and the plurality of flow guide fins 442 in the first water-cooled heat dissipation plate 400 is conducive to enhancing the heat dissipation effect of the first water-cooled heat dissipation plate 400.

[0198] In the embodiment of the present application, the first partition protrusion 421 is used for partitioning the first communication hole 411 and the second communication hole 412, which is conducive to avoiding the cooling water from flowing directly from the first communication hole 411 to the second communication hole. The heat dissipation fins 441 and the flow guide fins 442 are distributed on both sides of the first partition protrusion 421, so that the first heat dissipation plate flow channel 431 and the second heat dissipation plate flow channel 432 can cooperate with the heat dissipation fins 441 and the flow guide fins 442. In an embodiment, part of the heat dissipation fins 441 and part of the flow guide fins 442 are also distributed on both sides of the second partition protrusion 422.

[0199] In the embodiments of the present application, according to the functions of the heat dissipation fins 441 and the flow guide fins 442, the heat dissipation fins 441 and the flow guide fins 442 can be arranged at different positions of the first water-cooled heat dissipation plate 400. In an embodiment, the electrical components 300 distributed between the first water-cooled heat dissipation plate 400 and the second water-cooled heat dissipation plate 500 along the first direction A, the loss density of the electrical components 300 coinciding with the projection of the heat dissipation fins 441 along the first direction A is higher than that of other electrical components 300. In an embodiment, the electrical components 300 distributed between the first water-cooled heat dissipation plate 400 and the second water-cooled heat dissipation plate 500 along the first direction A, the temperature resistance level of the electrical components 300 coinciding with the projection of the heat dissipation fins 441 along the first direction A is lower than that of other electrical components 300. In the embodiments of the present application, both the loss density and the temperature resistance level can represent the heat dissipation demand of the electrical components 300, and arranging the heat dissipation fins 441 adjacent to the electrical components 300 with higher loss density and lower temperature resistance level can target the electrical components 300 with higher heat dissipation demand for cooling. In an embodiment, the end surface of the heat dissipation fins 441 along the first direction A can be circular, elliptical, square or rhombic. Among them, the heat dissipation fins 441 with circular or elliptical shape are relatively easy to process, and the heat dissipation fins 441 with square or rhombic shape have relatively better disturbance effect on the cooling water.

[0200] In an embodiment, the flow guide fins 442 are adjacent to the corner regions of the first water-cooled heat dissipation plate 400. In the embodiments of the present application, the corner regions are inflection points on the cooling water flow path, and the flow direction of the cooling water at the corner regions usually changes greatly. Without the guidance of the flow guide fins 442, part of the cooling water may accumulate in the corner regions due to the slowing down of the flow speed during the turning process, forming a flow dead zone, which is not conducive to the uniform distribution of the cooling water in the first water-cooled heat dissipation plate 400. The flow guide fins 442 in the embodiments of the present application can force the cooling water to flow along the extension direction of the flow guide fins 442, thereby improving the heat dissipation efficiency of the cooling water. In an embodiment, the end surface of the flow guide fins 442 along the first direction A can be linear, arcuate, sickle-shaped or a combination of the above shapes.

[0201] Please continue to refer to Figure 3 In an embodiment, at least one of the number, shape or arrangement of at least one of the flow guide fins 442 or the heat dissipation fins 441 on both sides of the first partition protrusion 421 is different.

[0202] In the embodiment of the present application, the heat dissipation fins 441 on both sides of the first partitioning protrusion 421 are different in at least one of the number, shape, or arrangement. Alternatively, the flow guide fins 442 on both sides of the first partitioning protrusion 421 are different in at least one of the number, shape, or arrangement. Alternatively, the heat dissipation fins 441 on both sides of the first partitioning protrusion 421 are different in at least one of the number, shape, or arrangement, and the flow guide fins 442 on both sides of the first partitioning protrusion 421 are different in at least one of the number, shape, or arrangement. The embodiment of the present application facilitates adjusting the layout of the heat dissipation fins 441 and the flow guide fins 442 according to the actual heat dissipation requirement of the electrical component 300.

[0203] Please continue to refer to Figure 3 and Figure 4 In an embodiment, the first water-cooled heat sink 400 includes a flow channel groove 451. The groove of the flow channel groove 451 faces the electrical component 300 away from the vehicle-mounted charger 11 in the first direction A, and the flow channel groove 451 is integrated into the surface of the cover plate 100 facing away from the accommodation groove 200 in the first direction A.

[0204] The cover plate 100 includes a sealing plate 110. The sealing plate 110 is distributed on the outer side of the accommodation groove 200, and the sealing plate 110 is used to cover the groove of the flow channel groove 451 in the first direction A.

[0205] In the embodiment of the present application, the flow channel groove 451 of the first water-cooled heat sink 400 is integrated into the cover plate 100, which is beneficial to enhancing the structural strength of the flow channel groove 451. In addition, the embodiment of the present application can also improve the integration of the vehicle-mounted charger 11, which is beneficial to realizing the lightweight design of the vehicle-mounted charger 11 and optimizing the layout of the power assembly 10.

[0206] In the embodiment of the present application, the air in the accommodation groove 200 expands in volume after being heated and tends to move upward to the cover plate 100. Integrating the flow channel groove 451 of the first water-cooled heat sink 400 into the cover plate 100 is beneficial to heat exchange between the first water-cooled heat sink 400 and the hot air in the accommodation groove 200. In addition, it can also avoid occupying the space in the accommodation groove 200 by the first water-cooled heat sink 400, which is beneficial to optimizing the layout of the plurality of electrical components 300 in the accommodation groove 200.

[0207] In the embodiments of the present application, the first water-cooled heat sink 400 and the second water-cooled heat sink 500 can also indirectly cool the electrical components 300. Specifically, when the electrical components 300 with high loss density generate heat, the temperature in the accommodating groove 200 rises, and the heated air expands and decreases in density, so that the hot air tends to flow upward to the cover plate 100. The flow channel 451 of the first water-cooled heat sink 400 is integrated in the cover plate 100, and the cooling water in the flow channel 451 can exchange heat with the hot air, taking away the heat in the air, which helps to reduce the temperature in the accommodating groove 200 and effectively improves the heat dissipation efficiency.

[0208] In the embodiments of the present application, the cooling water with relatively low temperature in the shell water inlet flow channel 600 flows into the first water-cooled heat sink 400 through the first communication hole 411, and the first water-cooled heat sink 400 is relatively farther away from the groove bottom of the accommodating groove 200 than the second water-cooled heat sink 500, so that the cooling water with low temperature in the first water-cooled heat sink 400 can exchange heat with the hot air rising in the accommodating groove 200, thereby reducing the temperature in the accommodating groove 200.

[0209] Please continue to refer to Figures 3 to 6 In an embodiment, the surface of the first water-cooled heat sink 400 along the second direction B has a larger area than the surface of the second water-cooled heat sink 500 along the second direction B, and the second direction B is perpendicular to the first direction A.

[0210] In the embodiments of the present application, the second direction B is perpendicular to the arrangement direction of the first water-cooled heat sink 400 and the second water-cooled heat sink 500, and the surface of the first water-cooled heat sink 400 along the second direction B has a larger area than the surface of the second water-cooled heat sink 500 along the second direction B, which can increase the contact area of the first water-cooled heat sink 400 with the hot air, thereby reducing the temperature in the accommodating groove 200. In addition, the first water-cooled heat sink 400 is integrated in the cover plate 100, and the length of the first water-cooled heat sink 400 in the second direction B will not interfere with the layout of the electrical components 300 in the accommodating groove 200. The second water-cooled heat sink 500 is located in the accommodating groove 200, and if the surface of the second water-cooled heat sink 500 along the second direction B has too large an area, it may also need to consider the avoidance problem with the electrical components 300.

[0211] Please refer to Figure 4 and Figure 12 In an embodiment, the surface of the cover plate 100 along the first direction A towards the accommodating groove 200 includes a plurality of fixing protrusions 130. The plurality of fixing protrusions 130 are used to fix the circuit board 301 and the electrical components 300 of the vehicle charger 11, and the surface of the circuit board 301 along the first direction A towards the cover plate is used to fix the electrical components 300.

[0212] In the embodiment of the present application, the surface of the cover plate 100 away from the accommodating groove 200 is integrated with the first water-cooled heat dissipation plate 400, and the surface of the cover plate 100 facing the accommodating groove 200 is used to fix the electrical component 300. The fixing protrusion 130 is part of the cover plate 100, and the fixing protrusion 130 fixes the electrical component 300, which is equivalent to that the cover plate 100 directly contacts the electrical component, so that the heat transmission path between the electrical component 300 and the first water-cooled heat dissipation plate 400 is shortened, and the risk of cooling water leakage is also reduced without occupying the space of the accommodating groove 200 by the first water-cooled heat dissipation plate 400.

[0213] Please refer to Figure 4 and Figure 5 In an embodiment, the housing water inlet flow channel 600 and the housing water outlet flow channel 700 are distributed on the outer side of the accommodating groove 200.

[0214] In the embodiment of the present application, the housing water inlet flow channel 600 is communicated with the flow channel of the first water-cooled heat dissipation plate 400 through the first communication hole 411, and the housing water outlet flow channel 700 is communicated with the flow channel of the first water-cooled heat dissipation plate 400 through the second communication hole 412. The flow channel groove 451 is distributed on the surface of the cover plate 100 away from the groove bottom of the accommodating groove 200, and the first communication hole 411 and the second communication hole 412 are distributed on the groove bottom of the flow channel groove 451. That is, the first communication hole 411 and the second communication hole 412 are closer to the outer side of the accommodating groove 200 than the second water-cooled heat dissipation plate 500. If the housing water inlet flow channel 600 and the housing water outlet flow channel 700 are distributed on the inner side of the accommodating groove 200, the difficulty and processing cost of the communication between the housing water inlet flow channel 600, the housing water outlet flow channel 700 and the first water-cooled heat dissipation plate 400 will be increased, and the housing water inlet flow channel 600 and the housing water outlet flow channel 700 will also occupy the internal space of the accommodating groove 200.

[0215] Please refer to Figure 5 In an embodiment, the outlet of the housing water inlet flow channel 600 is used to communicate with the first communication hole 411, and the direction of the outlet of the housing water inlet flow channel 600 is the same as the direction of the slot of the accommodating groove 200.

[0216] In the embodiment of the present application, the surface of the cover plate 100 along the first direction A facing the accommodating groove 200 is used to fix the flow channel communication assembly 900, and the flow channel communication assembly 900 is distributed on the outer side of the accommodating groove 200. One end of the flow channel communication assembly 900 is used to cover the first communication hole 411, and the other end of the flow channel communication assembly 900 is used to be embedded in the outlet of the housing water inlet flow channel 600.

[0217] In the embodiment of the present application, the flow channel communication assembly 900 is used to realize the communication between the outlet of the shell water inlet flow channel 600 and the first communication hole 411 of the first water-cooled heat dissipation plate 400. The shell water inlet flow channel 600 and the flow channel communication assembly 900 are both distributed on the outer side of the containing groove 200, facilitating the inspection of the communication condition and reducing the difficulty of communication. One end of the flow channel communication assembly 900 covers the first communication hole 411, and the other end of the flow channel communication assembly 900 is embedded in the outlet of the shell water inlet flow channel 600, which is conducive to avoiding the leakage of cooling water at the connection between the flow channel communication assembly 900 and the shell water inlet flow channel 600 and the cover plate 100.

[0218] Please continue to refer to Figure 4 In an embodiment, the inlet of the shell water outlet flow channel 700 is used to receive the cooling water output by the first water-cooled heat dissipation plate 400, and the outlet of the shell water outlet flow channel 700 is used to discharge the cooling water from the vehicle-mounted charger 11.

[0219] The inlet of the shell water outlet flow channel 700 is distributed on the groove wall of the containing groove 200, and the outlet of the shell water outlet flow channel 700 is distributed on the outer side of the containing groove 200. The direction of the inlet of the shell water outlet flow channel 700 is opposite to the direction of the second communication hole 412. The second communication hole 412 is embedded in the inlet of the shell water outlet flow channel 700.

[0220] In the embodiment of the present application, the first water-cooled heat dissipation plate 400 is integrated in the cover plate 100, and the cover plate 100 and the containing groove 200 are stacked along the first direction A. The inlet of the shell water outlet flow channel 700 is arranged on the groove wall of the containing groove 200, and the direction of the inlet of the shell water outlet flow channel 700 is opposite to the direction of the second communication hole 412, which is conducive to shortening the transmission distance of the cooling water between the second communication hole 412 and the shell water outlet flow channel 700. The outlet of the shell water outlet flow channel 700 is arranged on the outer side of the containing groove 200, and the second communication hole 412 is embedded in the inlet of the shell water outlet flow channel 700, which can avoid the leakage of cooling water with a higher temperature into the containing groove 200.

[0221] Please continue to refer to Figure 3 and Figure 4 In an embodiment, the groove wall of the containing groove 200 includes a first section groove wall 210 and a second section groove wall 220. The first section groove wall 210 and the second section groove wall 220 are oppositely arranged along a second direction B, and the second direction B is perpendicular to the first direction A.

[0222] The distance between each of the first communication hole 411, the second communication hole 412, the third communication hole 413, the fourth communication hole 414, the outlet of the shell water inlet flow channel 600 and the inlet of the shell water outlet flow channel 700 and the first section groove wall 210 is less than the distance between each of the first communication hole 411, the second communication hole 412, the third communication hole 413, the fourth communication hole 414, the outlet of the shell water inlet flow channel 600 and the inlet of the shell water outlet flow channel 700 and the second section groove wall 220.

[0223] In the embodiment of the present application, the first communication hole 411, the second communication hole 412, the third communication hole 413 and the fourth communication hole 414 are adjacent to the first section groove wall 210 of the containing groove 200, so that the first communication hole 411, the second communication hole 412, the third communication hole 413 and the fourth communication hole 414 are arranged compactly, which is beneficial to reduce the processing difficulty and cost of the flow channel groove. The third communication hole 413 and the fourth communication hole 414 are adjacent to the first section groove wall 210 of the containing groove 200, so that the first communication interface 140 and the second communication interface 150 also approach the containing groove 200 along the second direction B, which can increase the space in the containing groove 200 for accommodating the electrical component 300. The first communication hole 411 and the second communication hole 412 are adjacent to the first section groove wall 210 of the containing groove 200, which facilitates the first communication hole 411 and the second communication hole 412 to communicate with the shell water inlet flow channel 600 and the shell water outlet flow channel 700 distributed outside the containing groove 200.

[0224] It should be noted that the first communication hole 411, the second communication hole 412, the third communication hole 413 and the fourth communication hole 414 are all close to the first section groove wall 210 of the containing groove 200, which does not mean that the path of the cooling water flowing from the first communication hole 411 to the third communication hole 413 and from the fourth communication hole 414 to the second communication hole 412 is necessarily shorter. Please refer to Figure 6 and Figure 8 As shown in Figure 8 , the distance between the first section groove wall 210 and the third communication hole 413 and the fourth communication hole 414 is less than the distance between the second section groove wall 220 and the third communication hole 413 and the fourth communication hole 414, and the distance between the first section groove wall 210 and the first communication hole 411 and the second communication hole 412 is greater than the distance between the second section groove wall 220 and the first communication hole 411 and the second communication hole 412. As can be seen from Figure 6 and Figure 8 , the length of the path between the first communication hole 411, the second communication hole 412 and the third communication hole 413, the fourth communication hole 414 is related to the relative position of the four communication holes, but also affected by the shape, layout of the first separation protrusion 421 and the second separation protrusion 422 and the position of the shunt flow channel 800.

[0225] In an embodiment, the distance between the first communication hole, the second communication hole and the first section of the groove wall is less than the distance between the first communication hole, the second communication hole and the second section of the groove wall. The distance between the third communication hole, the fourth communication hole and the second section of the groove wall is less than the distance between the third communication hole, the fourth communication hole and the first section of the groove wall. In the embodiment of the present application, the first communication hole and the second communication hole, and the third communication hole and the fourth communication hole are adjacent to the first section of the groove wall and the second section of the groove wall respectively, which is conducive to extending the flow path of the cooling water between the first communication hole and the third communication hole, and between the second communication hole and the fourth communication hole.

[0226] The vehicle-mounted charger with the three-dimensional water cooling circuit, the power assembly and the electric vehicle provided by the embodiments of the present application are described in detail above, and the principles and embodiments of the present application are described by applying specific examples. The above embodiment descriptions are only used to help understand the method of the present application and its core idea. Meanwhile, for those skilled in the art, the specific embodiments and application ranges will be changed according to the idea of the present application. In conclusion, the content of the specification should not be understood as a limitation of the present application.

Claims

1. An on-vehicle charger having a three-dimensional water cooling circuit, characterized by comprising: The electrical assembly of the vehicle-mounted charger is used for charging and discharging the power battery of the electric vehicle, the housing of the vehicle-mounted charger includes a cover plate and a receiving groove, the cover plate is used for enclosing the receiving groove in a first direction, and the receiving groove is used for accommodating the electrical assembly of the vehicle-mounted charger, wherein: The three-dimensional water cooling circuit of the vehicle-mounted charger includes a first water cooling heat sink, a second water cooling heat sink, a shunt flow channel, a housing water inlet flow channel, and a housing water outlet flow channel, the first water cooling heat sink and the second water cooling heat sink are stacked in the first direction, and the electrical assembly of the vehicle-mounted charger is arranged between the first water cooling heat sink and the second water cooling heat sink; The first water cooling heat sink includes a first separation protrusion, a second separation protrusion, a first communication hole, a second communication hole, a third communication hole, and a fourth communication hole, the first separation protrusion and the second separation protrusion are used to separate the flow channel of the first water cooling heat sink into a first heat sink flow channel and a second heat sink flow channel, the shunt flow channel is used to communicate the first heat sink flow channel and the second heat sink flow channel, the first separation protrusion is distributed between the first communication hole and the second communication hole, and the second separation protrusion is distributed between the third communication hole and the fourth communication hole; The first communication hole and the third communication hole are distributed in the first heat sink flow channel, the second communication hole and the fourth communication hole are distributed in the second heat sink flow channel, the first heat sink flow channel is used to receive cooling water from the housing water inlet flow channel through the first communication hole, the first heat sink flow channel is used to deliver cooling water to the inlet of the flow channel of the second water cooling heat sink through the third communication hole, the second heat sink flow channel is used to receive cooling water from the outlet of the flow channel of the second water cooling heat sink through the fourth communication hole, the second heat sink flow channel is used to receive cooling water from the first heat sink flow channel through the shunt flow channel, and the second heat sink flow channel is used to deliver cooling water to the housing water outlet flow channel through the second communication hole.

2. The on-board charger according to claim 1, characterized by The shunt flow channel is distributed in the gap between the first separation protrusion and the second separation protrusion.

3. The on-board charger of claim 1, wherein, The shunt flow channel is distributed between the inlet of the flow channel of the second water cooling heat sink and the outlet of the flow channel of the second water cooling heat sink, the inlet of the shunt flow channel is used to communicate the first heat sink flow channel through the inlet of the flow channel of the second water cooling heat sink, and the outlet of the shunt flow channel is used to communicate the second heat sink flow channel through the outlet of the flow channel of the second water cooling heat sink.

4. The on-board charger of claim 1, wherein, The surface of the first water cooling heat sink in the first direction towards the second water cooling heat sink includes a first communication interface and a second communication interface, the surface of the second water cooling heat sink in the first direction towards the first water cooling heat sink is used to fix the first communication interface and the second communication interface, the first communication interface is used to communicate the third communication hole and the inlet of the flow channel of the second water cooling heat sink, and the second communication interface is used to communicate the fourth communication hole and the outlet of the flow channel of the second water cooling heat sink; The shunt flow channel is distributed between the first communication interface and the second communication interface, an inlet of the shunt flow channel is used to communicate the first heat sink flow channel through the first communication interface, and an outlet of the shunt flow channel is used to communicate the second heat sink flow channel through the second communication interface.

5. The vehicle charger of any one of claims 1-4, wherein, The first water-cooled heat sink further comprises a plurality of heat dissipation fins and a plurality of flow guide fins, wherein: The first partition protrusion is used to partition the first communication hole and the second communication hole, the plurality of heat dissipation fins are distributed on both sides of the first partition protrusion, the plurality of flow guide fins are distributed on both sides of the first partition protrusion, the length of each flow guide fin is greater than the length of each heat dissipation fin, and the gap between adjacent two heat dissipation fins is smaller than the gap between adjacent two flow guide fins.

6. The on-board charger according to claim 5, characterized in that, At least one of the number, shape or arrangement of at least one of the flow guide fins or the heat dissipation fins on both sides of the first partition protrusion is different.

7. The vehicle charger of any one of claims 1-6, wherein, The first water-cooled heat sink comprises a flow channel groove, an opening of the flow channel groove faces away from the electrical components of the vehicle-mounted charger along the first direction, and the flow channel groove is integrated into the surface of the cover plate facing away from the accommodating groove along the first direction. The cover plate comprises a sealing plate, the sealing plate is distributed on the outer side of the accommodating groove, and the sealing plate is used to cover the opening of the flow channel groove along the first direction.

8. The vehicle-mounted charger according to claim 7, characterized by, The area of the surface of the first water-cooled heat sink along the second direction is greater than the area of the surface of the second water-cooled heat sink along the second direction, and the second direction is perpendicular to the first direction.

9. The on-board charger according to claim 7 or 8, characterized in that, The surface of the cover plate facing the accommodating groove along the first direction comprises a plurality of fixing protrusions, the plurality of fixing protrusions are used to fix the circuit board of the vehicle-mounted charger and the electrical components, and the surface of the circuit board facing the cover plate along the first direction is used to fix the electrical components.

10. The vehicle charger of any one of claims 7-9, wherein, The shell water inlet flow channel and the shell water outlet flow channel are distributed on the outer side of the accommodating groove.

11. The vehicle-mounted charger according to claim 10, characterized by, The outlet of the shell water inlet flow channel is used to communicate the first communication hole, and the direction of the outlet of the shell water inlet flow channel is the same as the direction of the opening of the accommodating groove. The surface of the cover plate facing the accommodating groove along the first direction is used to fix a flow channel communication assembly, the flow channel communication assembly is distributed on the outer side of the accommodating groove, one end of the flow channel communication assembly is used to cover the first communication hole, and the other end of the flow channel communication assembly is used to be embedded in the outlet of the shell water inlet flow channel.

12. The vehicle-mounted charger according to claim 11, characterized by, The inlet of the shell water outlet flow channel is used to receive the cooling water output by the first water-cooled heat sink, and the outlet of the shell water outlet flow channel is used to discharge the cooling water out of the vehicle-mounted charger. The inlet of the shell water outlet flow channel is distributed on the groove wall of the accommodating groove, the outlet of the shell water outlet flow channel is distributed on the outer side of the accommodating groove, the direction of the inlet of the shell water outlet flow channel is opposite to the direction of the second communication hole, and the second communication hole is embedded in the inlet of the shell water outlet flow channel.

13. The vehicle-mounted charger according to claim 12, characterized by, The groove wall of the accommodating groove comprises a first section groove wall and a second section groove wall, the first section groove wall and the second section groove wall are oppositely arranged along the second direction, and the second direction is perpendicular to the first direction. The distance between each of the first communication hole, the second communication hole, the third communication hole, the fourth communication hole, the outlet of the shell water inlet flow channel and the inlet of the shell water outlet flow channel and the first section of the tank wall is less than the distance between each of the first communication hole, the second communication hole, the third communication hole, the fourth communication hole, the outlet of the shell water inlet flow channel and the inlet of the shell water outlet flow channel and the second section of the tank wall.

14. A powertrain, characterized by, The power assembly comprises a driving motor, a speed reducer and the on-vehicle charger according to any one of claims 1-13, the on-vehicle charger being configured to charge and discharge the power battery, the power battery being configured to supply power to the driving motor, and the driving motor being configured to be in driving connection with the speed reducer.

15. An electric vehicle characterized by comprising: The electric vehicle comprises the power battery and the power assembly according to claim 14, the power assembly being configured to receive power supply from the power battery and to drive the wheels of the electric vehicle.

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