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

Abstract

The invention provides a vehicle-mounted charger with a three-dimensional water cooling loop, a power assembly and an electric vehicle. The electrical assembly of the vehicle-mounted charger is used for charging and discharging a power battery of the electric vehicle. The shell of the vehicle-mounted charger comprises a cover plate and a containing groove. The cover plate is used for enclosing a containing groove in the first direction, and the containing groove is used for containing an electrical assembly of the vehicle-mounted charger. The three-dimensional water cooling loop of the vehicle-mounted charger comprises a first water cooling heat dissipation plate, a second water cooling heat dissipation plate, a shell water inlet flow channel and a shell water outlet flow channel. The first water-cooling heat dissipation plate and the second water-cooling heat dissipation plate are arranged in a stacked mode in the first direction. Electrical components of the vehicle-mounted charger are arranged between the first water-cooling heat dissipation plate and the second water-cooling heat dissipation plate. The first water-cooling heat dissipation plate and the second water-cooling heat dissipation plate are utilized to form double-sided heat dissipation on the electrical assembly, and the cooling effect on the vehicle-mounted charger can be enhanced.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicles, and in particular to an on-board charger, a powertrain and an electric vehicle with a three-dimensional water cooling circuit. Background Art

[0002] In the new energy vehicle industry, the powertrain is the power source of the entire vehicle. In the powertrain, the on-board charger is used to charge and discharge the power battery to ensure the normal driving of the vehicle. When the on-board charger is in operation, the internal components of the on-board charger will generate a lot of heat. However, the heat dissipation effect of the on-board charger is currently poor, and the internal components are seriously heated, which has a negative impact on the working efficiency of the on-board charger and the powertrain. Summary of the invention

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

[0004] In a first aspect, an embodiment of the present application provides a vehicle charger. The electrical components of the vehicle charger are used to charge and discharge the power battery of the electric vehicle. The housing of the vehicle 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 receive the electrical components of the vehicle charger.

[0005] The three-dimensional water cooling circuit of the on-board charger includes a first water-cooled heat sink, a second water-cooled heat sink, a diversion channel, a shell water inlet channel, and a shell water outlet channel. The first water-cooled heat sink and the second water-cooled heat sink are stacked in a first direction, and the electrical components of the on-board charger are arranged between the first water-cooled heat sink and the second water-cooled heat sink.

[0006] The first water-cooled heat sink includes a first dividing protrusion, a second dividing protrusion, a first connecting hole, a second connecting hole, a third connecting hole and a fourth connecting hole. The first dividing protrusion and the second dividing protrusion are used to divide the flow channel of the first water-cooled heat sink into a first heat sink flow channel and a second heat sink flow channel, and the flow dividing flow channel is used to connect the first heat sink flow channel and the second heat sink flow channel. The first dividing protrusion is distributed between the first connecting hole and the second connecting hole, and the second dividing protrusion is distributed between the third connecting hole and the fourth connecting hole.

[0007] The first connecting hole and the third connecting hole are distributed in the first heat sink flow channel, and the second connecting hole and the fourth connecting hole are distributed in the second heat sink flow channel. The first heat sink flow channel is used to receive cooling water from the water inlet flow channel of the shell through the first connecting hole, and the first heat sink flow channel is used to transport cooling water to the inlet of the flow channel of the second water-cooled heat sink through the third connecting hole. The second heat sink flow channel is used to receive cooling water from the outlet of the flow channel of the second water-cooled heat sink through the fourth connecting hole, and the second heat sink flow channel is used to receive cooling water from the first heat sink flow channel through the diversion flow channel, and the second heat sink flow channel is used to transport cooling water to the water outlet flow channel of the shell through the second connecting hole.

[0008] In the embodiment of the present application, some electrical components have high loss density and generate more heat during operation. The heating of electrical components with high loss density not only reduces their own working efficiency, but also causes negative impacts on electrical components with lower temperature resistance levels.

[0009] To solve the above problems, the embodiment of the present application arranges the electrical components along a first direction between the first water-cooled heat sink and the second water-cooled heat sink. The cooling water in the first water-cooled heat sink and the second water-cooled heat sink can cool the electrical components from different angles, thereby achieving three-dimensional cooling of the electrical components, which is beneficial to expanding the cooling range of the cooling water in the electrical components and avoiding the problem of insufficient local cooling.

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

[0011] In the embodiment of the present application, the first water-cooled heat sink and the second water-cooled heat sink are interconnected through the third connecting hole and the fourth connecting hole. The first water-cooled heat sink and the second water-cooled heat sink are both connected to the water inlet channel of the shell through the first connecting hole and the water outlet channel of the shell through the second connecting hole. The first connecting hole, the second connecting hole, the third connecting hole, and the fourth connecting hole are all distributed on the first water-cooled heat sink, which is conducive to simplifying the structure of the three-dimensional water cooling circuit of the on-board charger. In addition, it is also beneficial to design the first water-cooled heat sink and the second water-cooled heat sink into a mixed cooling form of series and parallel connection according to the heat dissipation requirements of the electrical components, thereby improving the practicality of the first water-cooled heat sink and the second water-cooled heat sink.

[0012] In an embodiment of the present application, the first dividing protrusion and the second dividing 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 dividing protrusion, the second dividing protrusion and the diverter flow channel to realize a series-parallel mixed 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 connecting hole, it is divided into two paths at the diverter flow channel. One path of cooling water flows to the second water-cooled heat sink, and the other path of cooling water flows to the second heat sink flow channel. Since the second water-cooled heat sink is connected to the first water-cooled heat sink, one path of cooling water will eventually flow back from the second water-cooled heat sink to the second heat sink flow channel.

[0013] In an embodiment of the present application, the first water-cooled heat sink and the second water-cooled heat sink are mixed in series and parallel, which can comprehensively utilize the advantages of the series branch and the parallel branch. Among them, the flow rate of 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 a series branch, which can prevent the temperature of the cooling water in the first water-cooled heat sink from rising too fast, which is beneficial to improving the cooling efficiency of the first water-cooled heat sink. The flow rate of 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 connected to the shell water inlet flow channel and the shell water outlet flow channel through the first water-cooled heat sink. The second water-cooled heat sink includes a parallel branch, which is beneficial to reduce the flow resistance loss of 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 dividing protrusion and the second dividing protrusion divide the first water-cooled heat sink into a first heat sink flow channel and a second heat sink flow channel, and the first heat sink flow channel and the second heat sink flow channel are connected through a diversion flow channel, so that the cooling water can flow in a pre-designed series-parallel mixed manner. If the first dividing protrusion and the second dividing 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, the flow path of the cooling water may be relatively chaotic, and it is difficult to comprehensively exert the advantages of the series branch and the parallel branch.

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

[0016] In an embodiment of the present application, the shunt flow channel is used to directly connect 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 connecting hole, it is divided into two paths at the shunt flow channel. One path of cooling water flows to the second heat sink flow channel and the second connecting hole in sequence through the shunt flow channel, and the other path of cooling water flows through the third connecting hole, the second water-cooled heat sink and the fourth connecting hole in sequence and also flows into the second heat sink flow channel. The cooling water flows from the first connecting hole to the shunt flow channel and from the first connecting hole to the fourth connecting hole to form two parallel branches. The cooling water of the two parallel branches converges in the second heat sink flow channel and flows to the second connecting hole to form a series branch, forming a cooling method of first parallel and then series in the first water-cooled heat sink and the second water-cooled heat sink. In an 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 cooling circuit of the on-board charger while realizing the series-parallel design.

[0017] In one embodiment, the flow diversion 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 flow diversion channel is used to connect to the flow channel of the first heat sink through the inlet of the flow channel of the second water-cooled heat sink, and the outlet of the flow diversion channel is used to connect to the flow channel of the second heat sink 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 from the first connecting hole through the first heat sink flow channel and the inlet of the second water-cooled heat sink in sequence, and is divided into two paths at the branch flow channel. One path of cooling water flows to the fourth connecting hole and the second heat sink flow channel in sequence through the branch flow channel, and the other path of cooling water flows through the flow channel of the second water-cooled heat sink and also flows into the second heat sink flow channel. In the embodiment of the present application, the range of the series branch extends from the second heat sink flow channel to the second water-cooled heat sink, which is beneficial to the cooling efficiency of the second water-cooled heat sink on the electrical components.

[0019] In one embodiment, the surface of the first water-cooled heat sink along the first direction toward the second water-cooled heat sink includes a first communication interface and a second communication interface. The surface of the second water-cooled heat sink along the first direction toward the first water-cooled heat sink is used to fix the first communication interface and the second communication interface. The first communication interface is used to connect 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 connect the fourth communication hole and the outlet of the flow channel of the second water-cooled heat sink.

[0020] The flow diversion channel is distributed between the first communication interface and the second communication interface. The inlet of the flow diversion channel is used to connect to the first heat sink channel through the first communication interface, and the outlet of the flow diversion channel is used to connect to the second heat sink 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 connect the first water-cooled heat sink and the second water-cooled heat sink. The first communication interface and the second communication interface are integrated with 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 is also conducive to preventing cooling water from leaking during the process of flowing between the first water-cooled heat sink and the second water-cooled heat sink.

[0022] In the embodiment of the present application, the flow diversion channel is distributed between the first communication interface and the second communication interface, and the flow diversion channel is arranged between the first water-cooled heat sink and the second water-cooled heat sink along the first direction, so as to achieve three-sided heat dissipation of the electrical components. Part of the second communication interface is used to form a series branch, which is conducive to improving the cooling efficiency of the second communication interface for the electrical components.

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

[0024] The first separation protrusion is used to separate the first connecting hole and the second connecting 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 two adjacent heat dissipation teeth is smaller than the gap between two adjacent flow guide teeth.

[0025] In an embodiment of the present application, the length of the heat dissipation teeth is less than that of the guide teeth, and the heat dissipation teeth are arranged more closely than the guide teeth, so that the interaction between the cooling water and the heat dissipation teeth is stronger, and the heat dissipation teeth can disturb the cooling water and enhance the heat dissipation effect. The length of the guide teeth is greater than the length of the heat dissipation teeth, which facilitates the cooling water to flow along the extension direction of the guide teeth. The guide teeth can guide the flow direction of the cooling water to achieve uniform distribution of the cooling water flow. The arrangement density of the guide teeth is less than that of the heat dissipation teeth, which is conducive to reducing the flow resistance of the cooling water. Integrating multiple heat dissipation teeth and multiple guide teeth into the first water-cooled heat sink is conducive to enhancing 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 connecting hole and the second connecting hole, which is beneficial to prevent the cooling water from flowing directly from the first connecting hole to the second connecting hole. Heat dissipation teeth and flow guide teeth are distributed on both sides of the first separation protrusion, so that the first heat dissipation plate flow channel and the second heat dissipation plate flow channel can cooperate with the heat dissipation teeth and flow guide teeth.

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

[0028] The embodiment of the present application facilitates adjustment of the layout of the heat dissipation teeth and the guide teeth according to the actual heat dissipation requirements of the electrical components.

[0029] In one embodiment, the first water-cooled heat sink includes a flow channel groove, the notch of which faces away from the electrical components of the on-board charger along a first direction, and the flow channel groove is integrated on a surface of the cover plate away from the receiving groove along the first direction.

[0030] The cover plate includes a sealing plate which is distributed on the outside of the receiving groove and is used to cover the notch of the flow channel groove along the first direction.

[0031] In the embodiment of the present application, the flow channel 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. In addition, the embodiment 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 powertrain.

[0032] In the embodiment of the present application, the volume of the air in the receiving tank expands 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 receiving tank. In addition, it can also avoid the first water-cooled heat sink occupying the space in the receiving tank, which is conducive to optimizing the layout of multiple electrical components in the receiving tank.

[0033] In the embodiment of the present application, the first water-cooled heat sink and the second water-cooled heat sink can also achieve indirect cooling of the electrical components. Specifically, when the electrical components with loss density generate heat, causing the temperature in the receiving tank to rise, the air expands in volume and decreases in density after being heated, causing the hot air to tend to flow upward to the cover plate. The flow channel groove of the first water-cooled heat sink is integrated in 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 beneficial to reducing the temperature in the receiving tank and effectively improving the heat dissipation efficiency.

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

[0035] In one embodiment, the surface area of ​​the first water-cooled heat sink along the second direction is greater than the surface area of ​​the second water-cooled heat sink along 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, and the surface area of ​​the first water-cooled heat sink along the second direction is greater than the surface area of ​​the second water-cooled heat sink along the second direction, which can increase the contact area between the first water-cooled heat sink and the hot air, and is beneficial to reduce the temperature in the receiving tank. In addition, the first water-cooled heat sink is integrated with the cover plate, and extending 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 receiving tank. The second water-cooled heat sink is located in the receiving tank. If the surface area of ​​the second water-cooled heat sink along the second direction is too large, it may also be necessary to consider the problem of avoiding the electrical components.

[0037] In one embodiment, the surface of the cover plate facing the receiving groove along the first direction includes a plurality of fixing protrusions. The plurality of fixing protrusions are used to fix the circuit board and 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 facing away from the receiving slot is integrated with the first water-cooled heat sink, and the surface of the cover plate facing the receiving slot is used to fix the electrical component. The fixing protrusion is part of the cover plate, and the fixing protrusion fixes the electrical component, which is equivalent to the cover plate directly contacting the electrical component, and can shorten the heat transfer path between the electrical component and the first water-cooled heat sink without occupying the space of the receiving slot, and can also reduce the risk of cooling water leakage.

[0039] In one embodiment, the shell water inlet channel and the shell water outlet channel are distributed on the outside of the containing groove.

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

[0041] In one embodiment, the outlet of the water inlet channel of the shell is used to communicate with the first connecting hole, and the direction of the outlet of the water inlet channel of the shell is the same as the direction of the notch of the accommodating groove.

[0042] The surface of the cover plate facing the receiving groove along the first direction is used to fix the flow channel communication component, which is distributed outside the receiving groove. One end of the flow channel communication component is used to cover the first communication hole, and the other end of the flow channel communication component 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 connecting component is used to connect the outlet of the water inlet flow channel of the shell to the first connecting hole of the first water-cooled heat sink. The water inlet flow channel of the shell and the flow channel connecting component are both distributed on the outside of the receiving groove, which is convenient for checking the connection and reducing the difficulty of connection. Among them, one end of the flow channel connecting component covers the first connecting hole, and the other end of the flow channel connecting component is embedded in the outlet of the water inlet flow channel of the shell, which is conducive to preventing cooling water from leaking at the connection between the flow channel connecting component and the water inlet flow channel of the shell and the cover plate.

[0044] In one embodiment, the inlet of the water outlet channel of the shell is used to receive the cooling water output by the first water-cooled heat sink, and the outlet of the water outlet channel of the shell is used to discharge the cooling water out of the on-board charger.

[0045] The inlet of the shell water outlet channel is distributed on the groove wall of the receiving groove, and the outlet of the shell water outlet channel is distributed on the outside of the receiving groove. The direction of the inlet of the shell water outlet channel is opposite to the direction of the second connecting hole, and the second connecting hole is embedded in the inlet of the shell water outlet channel.

[0046] In the embodiment of the present application, the first water-cooled heat sink is integrated into the cover plate, and the cover plate and the receiving groove are stacked along the first direction. The inlet of the shell water outlet flow channel is arranged on the groove wall of the receiving groove, and the direction of the inlet of the shell water outlet flow channel is opposite to the direction of the second connecting hole, which is conducive to shortening the transmission distance of the cooling water between the second connecting hole and the shell water outlet flow channel. The outlet of the shell water outlet flow channel is arranged on the outside of the receiving groove, and the second connecting hole is embedded in the inlet of the shell water outlet flow channel, which can prevent the cooling water with higher temperature from leaking into the receiving groove.

[0047] In one embodiment, the groove wall of the receiving groove includes a first groove wall section and a second groove wall section. The first groove wall section and the second groove wall section are arranged opposite to each other along a second direction, and the second direction is perpendicular to the first direction.

[0048] Among them, the distance between each of the first connecting hole, the second connecting hole, the third connecting hole, the fourth connecting hole, the outlet of the water inlet channel of the shell and the inlet of the water outlet channel of the shell and the first section of the groove wall is smaller than the distance between each of the first connecting hole, the second connecting hole, the third connecting hole, the fourth connecting hole, the outlet of the water inlet channel of the shell and the inlet of the water outlet channel of the shell and the second section of the groove wall.

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

[0050] In a second aspect, an embodiment of the present application provides a powertrain, which includes a drive motor, a reducer, and an on-board charger as described in any embodiment of the first aspect. The on-board charger is used to charge and discharge the power battery, the power battery is used to supply power to the drive motor, and the drive motor is used to be connected to the reducer in a transmission manner.

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

[0052] In a third aspect, an embodiment of the present application provides an electric vehicle, comprising a power battery and a powertrain as described in any one of the embodiments of the second aspect, the powertrain being used to receive power from the power battery and to drive wheels of the electric vehicle.

[0053] In the embodiments of the present application, the powertrain described in any one of the embodiments of the second aspect is applied to an electric vehicle, so that the powertrain is in a normal and stable working environment, which is beneficial to improving the performance of the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0056] Figure 2 is a schematic diagram of a powertrain provided in an embodiment of the present application;

[0057] Figure 3 is a partial exploded diagram of the vehicle charger provided in the embodiment of the present application;

[0058] Figure 4 is a schematic diagram of a vehicle charger provided in an embodiment of the present application;

[0059] Figure 5 is a schematic diagram of a vehicle charger provided in an embodiment of the present application;

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

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

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

[0063] Fig. 9 is a partial cross-sectional view of a cover plate provided in an embodiment of the present application;

[0064] Fig.10 is a partial cross-sectional view of a cover plate provided in an embodiment of the present application;

[0065] Fig.11 is a partial cross-sectional view of a cover plate provided in an embodiment of the present application;

[0066] Fig.12 is a schematic diagram of a cover plate provided in an embodiment of the present application;

[0067] Fig.13 is a schematic diagram of a powertrain provided in an embodiment of the present application;

[0068] Fig.14 is a partial schematic diagram of a vehicle charger provided in an embodiment of the present application;

[0069] Fig.15 It is a partial schematic diagram of the vehicle charger provided in the embodiment of the present application. DETAILED DESCRIPTION

[0070] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0071] For ease of understanding, the relevant technical terms involved in the embodiments of the present application are explained and described below.

[0072] Perpendicularity: The perpendicularity defined in the embodiments of the present application is not limited to an absolute perpendicular intersection relationship, and it is allowed that there are situations where the intersection is not absolutely perpendicular due to factors such as assembly tolerance, design tolerance, and structural flatness. Small angle errors are allowed, for example, within the range of 80 to 100 degrees, which can be understood as a perpendicular relationship.

[0073] Parallelism: The parallelism defined in the embodiments of the present application is not limited to absolute parallelism. This definition of parallelism can be understood as basic parallelism, which allows for the existence of situations where the absolute parallelism is not caused by factors such as assembly tolerance, design tolerance, and structural flatness.

[0074] See also Figure 1 , Figure 1 A schematic diagram of an electric vehicle 1 provided in an embodiment of the present application. In one embodiment, the electric vehicle 1 includes a powertrain 10 and a power battery 20. In one embodiment, the electric vehicle 1 also includes a frame 30, and the frame 30 is used to install the powertrain 10 and the power battery 20. Among them, the frame 30 is the structural skeleton of the electric vehicle 1, and can bear the internal and external environmental loads of the electric vehicle 1. In the embodiment of the present application, the electric vehicle 1 refers to a wheeled device driven or towed by a power device. The power battery 20 is used to supply power to the powertrain 10, and the power battery 20 can also be called a battery pack. The powertrain 10 is the power source of the electric vehicle 1, and the powertrain 10 is used to drive the wheels 40 of the electric vehicle 1.

[0075] See also Figure 2 , Figure 2 Schematic diagram of a powertrain 10 provided in an embodiment of the present application. In one embodiment, the powertrain 10 includes an on-board charger 11, a drive motor 12, and a reducer 13. The on-board charger 11 includes an electrical component 300, and the on-board charger 11 is used to charge and discharge the power battery 20 through the electrical component 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 one embodiment, the onboard charger 11 is used to convert AC power into DC power and then transmit the DC power to the powertrain 10 for charging, or the onboard charger 11 is used to directly transmit the DC power to the power battery 20 for charging. The AC power includes city power or civil AC power.

[0077] In one 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 battery, lights, wipers, air conditioner, audio, universal serial bus interface, instrument panel, and control display screen, and the low-voltage battery can also supply power to the remaining loads of the electric vehicle 1.

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

[0079] During the operation of the powertrain 10 , the electrical component 300 of the on-board charger 11 generates heat. If the cooling efficiency is low, the temperature of the electrical component 300 may be too high, which may cause the electrical component 300 to face the risk of over-temperature aging failure, thereby affecting the working efficiency of the on-board charger 11 and the powertrain 10 .

[0080] The embodiment of the present application improves the cooling method of the on-board charger 11 to enhance the heat dissipation efficiency and ensure the normal operation of the on-board charger 11 and the powertrain 10 .

[0081] Please refer to Figures 2 to 5 . Figure 3 This is a partial exploded view of the vehicle charger 11 provided in the embodiment of the present application. Figure 4 A schematic diagram of a vehicle charger 11 provided in an embodiment of the present application, Figure 5 This is a schematic diagram of a vehicle charger 11 provided in an embodiment of the present application. It should be noted that: Figure 4 and Figure 5 The positional relationship of each component in the vehicle charger 11 is only schematically shown, and does not represent its specific size, shape and structure. Figure 4 The first connecting hole and the water inlet channel of the shell are hidden. Figure 5 The second connecting hole and the water outlet channel of the shell are hidden.

[0082] The embodiment of the present application provides a vehicle charger 11, the housing of the vehicle charger 11 includes a cover plate 100 and a receiving groove 200. The cover plate 100 is used to enclose the receiving groove 200 along a first direction A, and the receiving groove 200 is used to receive the electrical component 300 of the vehicle charger 11.

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

[0084] The shell water inlet channel 600 and the shell water outlet channel 700 are distributed outside the receiving tank 200. The first water-cooled heat sink 400 and the second water-cooled heat sink 500 are stacked along the first direction A, 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, and the second water-cooled heat sink 500 is arranged between the circuit board 301 of the on-board charger 11 and the bottom of the receiving tank 200.

[0085] In the embodiment of the present application, the cover plate 100 is stacked on the receiving groove 200 along the first direction A, and the cover plate 100 and the shell together contain and protect the multiple electrical components 300 of the on-board charger 11. Among them, the electrical components 300 are used to charge and discharge the power battery 20, which means that the electrical components 300 can process and transfer the electric energy to the power battery 20, and can also process and transfer the electric energy of the power battery 20 to the load of the electric vehicle 1. In one embodiment, the functions of the electrical components 300 include at least one of filtering, energy storage, rectification, inversion, and voltage transformation.

[0086] In the embodiment of the present application, some electrical components 300 have a high loss density and generate a lot of heat during operation. The heat generated by the electrical components 300 with high loss density will not only reduce their own working efficiency, but also cause the air temperature in the receiving slot 200 to rise, so that the electrical components 300 with lower temperature resistance levels in the receiving slot 200 will also be negatively affected. Among them, loss density refers to the energy loss density during operation, and temperature resistance level refers to the maximum allowable operating temperature.

[0087] To solve the above problems, the embodiment of the present application arranges the electrical components 300 between the first water-cooled heat sink 400 and the second water-cooled heat sink 500 along 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, thereby achieving three-dimensional cooling of the electrical components 300, which is beneficial to expanding the cooling range of the cooling water in the electrical components 300 and avoiding the problem of insufficient local cooling. In one 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 separately.

[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 component 300. Specifically, when the electrical component 300 with loss density generates heat, causing the temperature in the receiving tank 200 to rise, the volume of the air expands and the density decreases after being heated, so that the hot air tends to flow upward to the cover plate 100. The first water-cooled heat sink 400 and the second water-cooled heat sink 500 are both located on the side of the bottom of the receiving tank 200 along the first direction A toward the cover plate 100. 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 conducive to reducing the temperature in the receiving tank, so that both electrical components with high heat generation and low temperature resistance are in an environment with suitable temperature, 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 into the bottom of the receiving tank 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 on the air in the receiving tank is limited.

[0089] In the embodiment of the present application, the three-dimensional water cooling circuit of the vehicle charger 11 also includes a shell water inlet channel 600 and a shell water outlet channel 700. The shell water inlet channel 600 and the shell water outlet channel 700 are both distributed on the outside of the receiving tank 200, which is convenient for checking the connectivity and does not occupy the internal space of the receiving tank 200. The shell water inlet channel 600 and the shell water outlet channel 700 are respectively used to realize the input and output of cooling water in the vehicle 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 renewal, 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 component 300.

[0090] In one embodiment, the shell water inlet channel 600 and the shell water outlet channel 700 are used to connect to a cooling system located outside the vehicle charger 11, and the external cooling system is used to realize the circulation flow of cooling water in the first water-cooled heat sink 400 and the second water-cooled heat sink 500.

[0091] In one embodiment, the communication relationship between the first water-cooled heat sink 400, the second water-cooled heat sink 500 and the water inlet flow channel 600 of the shell may include the following situations: one of the first water-cooled heat sink 400 or the second water-cooled heat sink 500 is used to receive the cooling water in the water inlet flow channel 600 of the shell and transmit the cooling water to the other of the first water-cooled heat sink 400 or the second water-cooled heat sink 500. Alternatively, both the first water-cooled heat sink 400 and the second water-cooled heat sink 500 are used to receive the cooling water in the water inlet flow channel 600 of the shell. In one embodiment, the communication relationship between the first water-cooled heat sink 400, the second water-cooled heat sink 500 and the water outlet flow channel 700 of the shell may include the following situations: one of the first water-cooled heat sink 400 or the second water-cooled heat sink 500 is used to receive the cooling water transmitted by the other of the first water-cooled heat sink 400 or the second water-cooled heat sink 500 and output the cooling water to the water outlet flow channel 700 of the shell. Alternatively, the first water-cooled heat sink 400 and the second water-cooled heat sink 500 are both used to output cooling water to the receiving shell water outlet channel 700. It can be understood that the connection relationship between the first water-cooled heat sink 400, the second water-cooled heat sink 500 and the shell water inlet channel 600 can be combined with the connection relationship between the first water-cooled heat sink 400, the second water-cooled heat sink 500 and the shell water outlet channel 700 according to actual conditions.

[0092] In one embodiment, the cooling water may also be cooling liquid or cooling oil.

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

[0094] The first connecting hole 411 and the second connecting hole 412 respectively penetrate the first water-cooled heat sink 400 along the first direction A. The opening directions of the first connecting hole 411 and the second connecting hole 412 are opposite to the notch direction of the receiving groove 200 .

[0095] In the embodiment of the present application, the first water-cooled heat sink 400 and the second water-cooled heat sink 500 are both connected to the water inlet channel 600 of the housing through the first connecting hole 411 and connected to the water outlet channel 700 of the housing through the second connecting hole 412. The first connecting hole 411 and the second connecting hole 412 are distributed on the first water-cooled heat sink 400, which is conducive to simplifying the structure of the three-dimensional water cooling circuit of the vehicle 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 cooling form of series, parallel or mixed series and parallel according to the heat dissipation requirements of different electrical components 300, thereby improving the practicality of the first water-cooled heat sink 400 and the second water-cooled heat sink 500.

[0096] In the embodiment of the present application, the cooling water with relatively low temperature in the water inlet channel 600 of the shell flows into the first water-cooled heat sink 400 through the first connecting hole 411. The first water-cooled heat sink 400 is farther away from the bottom of the receiving tank 200 than the second water-cooled heat sink 500, which facilitates the heat exchange between the cooling water with relatively low temperature in the first water-cooled heat sink 400 and the rising hot air in the receiving tank 200, thereby reducing the temperature in the receiving tank 200.

[0097] In the embodiment of the present application, the openings of the first connecting hole 411 and the second connecting hole 412 are oriented in parallel to the stacking direction of the cover plate 100 and the receiving groove 200, which is conducive to reducing the difficulty of processing the first connecting hole 411 and the second connecting hole 412. In the embodiment of the present application, since the on-board charger 11 itself occupies a certain space in the first direction A, the opening directions of the first connecting hole 411 and the second connecting hole 412 are opposite to the notch direction of the receiving groove 200, which facilitates the layout of the shell water inlet flow channel 600 and the shell water outlet flow channel 700 on the outer peripheral side of the receiving groove 200, and can control the length of the on-board charger 11 in the first direction A, and realize the miniaturization design of the on-board charger 11.

[0098] Please refer to Figure 3 , Figures 6 to 8 , Figure 6 A partial schematic diagram of a vehicle charger 11 provided in an embodiment of the present application, Figure 7 A partial schematic diagram of a vehicle charger 11 provided in an embodiment of the present application, Figure 8 This is a partial schematic diagram of the vehicle charger 11 provided in the embodiment of the present application. Figures 6 to 8 The dashed arrows in the figure indicate the flow direction of the cooling water.

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

[0100] The first dividing protrusion 421 and the second dividing protrusion 422 are used to divide the flow channel of 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 heat sink flow channel 431 and the second heat sink flow channel 432 are used to communicate through the diversion flow channel 800, and the diversion flow channel 800 is distributed in the gap between the first dividing protrusion 421 and the second dividing protrusion 422. The first connecting hole 411 and the third connecting hole 413 are used to connect the first heat sink flow channel 431, and the second connecting hole 412 and the fourth connecting hole 414 are used to connect the second heat sink flow channel 432.

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

[0102] The embodiment of the present application utilizes the first partition protrusion 421 and the second partition protrusion 422 to realize a series-parallel hybrid design in the first water-cooled heat sink 400 and the second water-cooled heat sink 500. Specifically, Figure 6As shown, after the cooling water flows from the first connecting hole 411 into the first heat sink flow channel 431, it is divided into two paths at the branch flow channel 800 of the first dividing protrusion 421 and the second dividing protrusion 422. One path flows to the second heat sink flow channel 432 and the second connecting hole 412 in sequence through the branch flow channel 800, and the other path flows through the third connecting hole 413, the second water-cooled heat sink 500 and the fourth connecting hole 414 in sequence and also flows into the second heat sink flow channel 432. The cooling water flows from the first connecting hole 411 to the branch flow channel 800 and from the first connecting hole 411 to the fourth connecting hole 414 to form two parallel branches. The cooling water of the two parallel branches merges in the second heat sink flow channel 432 and flows to the second connecting hole 412 to form a series branch, forming a cooling method of first parallel and then series in the first water-cooled heat sink 400 and the second water-cooled heat sink 500.

[0103] In the embodiment of the present application, the first water-cooled heat sink 400 and the second water-cooled heat sink 500 are mixed in series and parallel, which can comprehensively utilize the advantages of the series branch and the parallel branch. Among them, the flow rate of cooling water in the series branch is relatively large, and the series branch has the advantage of small thermal resistance. The first water-cooled heat sink 400 needs to cool the electrical component 300 and the hot air in the receiving tank 200. The second heat sink flow channel 432 of the first water-cooled heat sink 400 includes a series branch, which can avoid the temperature of the cooling water in the first water-cooled heat sink 400 from rising too fast, which is beneficial to improving the cooling efficiency of the first water-cooled heat sink 400. The flow rate of 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 to the first connecting hole 411 and the second connecting hole 412 through the first water-cooled heat sink 400. The second water-cooled heat sink 500 includes a parallel branch, which is beneficial to reduce the flow resistance loss of cooling water between the first water-cooled heat sink 400 and the second water-cooled heat sink 500.

[0104] In the embodiment of the present application, the first dividing protrusion 421 and the second dividing 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. The first heat sink flow channel 431 and the second heat sink flow channel 432 are connected through the diversion flow channel 800, so that the cooling water can flow in a pre-designed series-parallel mixed manner. If the first dividing protrusion 421 and the second dividing 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, the flow path of the cooling water may be relatively chaotic, and it is difficult to comprehensively exert the advantages of the series branch and the parallel branch.

[0105] like Figure 7As shown, in one embodiment, the positions of the first connecting hole 411 and the second connecting hole 412 relative to the first heat sink flow channel 431 and the second heat sink flow 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 flow channel 432, and the second connecting hole 412 and the fourth connecting hole 414 are used to connect the first heat sink flow channel 431. Since the third connecting hole 413 and the fourth connecting hole 414 are respectively used to connect the inlet and the outlet of the second water-cooled heat sink 500, 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 the embodiment of the present application, after the cooling water flows from the first connecting hole 411 into the second heat sink flow channel 432, it is divided into two paths at the branch flow channel 800. One path flows sequentially to the first heat sink flow channel 431 and the second connecting hole 412 through the branch flow channel 800, and the other path flows sequentially through the third connecting hole 413, the second water-cooled heat sink 500, and the fourth connecting hole 414, and then flows sequentially to the first heat sink flow channel 431 and the second connecting hole 412. In this case, a cooling method of first series connection and then parallel connection is formed in the first water-cooled heat sink 400 and the second water-cooled heat sink 500.

[0106] like Figure 8 As shown, in one embodiment, by changing the distance between the third connecting hole 413 and the fourth connecting hole 414 and the bypass channel 800, the first connecting hole 411, the second connecting hole 412, and the shape of the first dividing protrusion 421 and the second dividing protrusion 422, a cooling method of front-to-back series and middle parallel connection can also be formed in the first water-cooled heat sink 400 and the second water-cooled heat sink 500.

[0107] It should be noted that Figures 6 to 8 The series and parallel mixed mode of the first water-cooled heat sink 400 and the second water-cooled heat sink 500 is only schematically shown, and the dotted arrows are only used to indicate the movement trend of the cooling water, which does not mean that the cooling water can only flow along the dotted arrows.

[0108] Please continue reading Figure 3 and Figure 6 In one embodiment, 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 .

[0109] The distance between the diverter channel 800 and the third connecting hole 413 is smaller than the distance between the diverter channel 800 and the first connecting hole 411 , and the distance between the diverter channel 800 and the fourth connecting hole 414 is smaller than the distance between the diverter channel 800 and the second connecting hole 412 .

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

[0111] In the embodiment of the present application, in the first connecting hole 411 and the third connecting hole 413, the distance between the flow diversion channel 800 and the third connecting hole 413 is relatively close. In the second connecting hole 412 and the fourth connecting hole 414, the distance between the flow diversion channel 800 and the fourth connecting hole 414 is relatively close. The embodiment of the present application is conducive to extending the path of cooling water flowing from the first connecting hole 411 to the second connecting hole 412, and increasing the time for heat exchange between the cooling water and the heat source.

[0112] Please continue reading Figure 3 and Figure 4 In one embodiment, the first water-cooled heat sink 400 further includes 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 connecting hole 411 and the second connecting hole 412 so that the second heat sink flow channel 432 forms a U-shaped flow channel. 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 two adjacent heat dissipation teeth 441 is smaller than the gap between two adjacent flow guide teeth 442.

[0113] In the embodiment of the present application, the length of the heat dissipation teeth 441 is less than the length of the guide teeth 442, and the heat dissipation teeth 441 are arranged more closely than the guide teeth 442, so that the interaction between the cooling water and the heat dissipation teeth 441 is stronger, and the heat dissipation teeth 441 can play a disturbing role on the cooling water and enhance the heat dissipation effect. The length of the guide teeth 442 is greater than the length of the heat dissipation teeth, which facilitates the cooling water to flow along the extension direction of the guide teeth 442. The guide teeth 442 can guide the flow direction of the cooling water to achieve uniform distribution of the cooling water flow. The arrangement density of the guide teeth 442 is less than that of the heat dissipation teeth 441, which is conducive to reducing the flow resistance of the cooling water.

[0114] In the embodiment of the present application, the first partition protrusion 421 is used to divide the second heat sink flow channel 432 into a U-shaped flow channel, and to separate the first connecting hole 411 and the second connecting hole 412, which is conducive to extending the flow distance of the cooling water between the first connecting hole 411 and the second connecting 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, heat dissipation teeth 441 and guide teeth 442 are distributed on both sides of the first partition protrusion 421, which is conducive to expanding the coverage of the heat dissipation teeth 441 and the 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 guide teeth 442. In one embodiment, part of the heat dissipation teeth 441 is distributed on both sides of the second partition protrusion 422, and part of the guide teeth 442 is distributed on both sides of the second partition protrusion 422.

[0115] In the embodiment of the present application, the diverter channel 800 is relatively close to the fourth connecting hole 414 and relatively far from the second connecting hole 412. The second heat sink channel 432 is a U-shaped channel, which can further extend the distance that the cooling water flows between the diverter channel 800 and the second connecting hole 412, thereby expanding 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 guide teeth 442, the heat dissipation teeth 441 and the guide teeth 442 can be arranged at different positions of the first water-cooled heat sink 400. In one embodiment, among 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 that overlap with the projection portion of the heat dissipation teeth 441 along the first direction A is higher than the loss density of other electrical components 300. In one embodiment, among 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 level of the electrical components 300 that overlap with the projection portion of the heat dissipation teeth 441 along the first direction A is lower than the temperature resistance level of other electrical components 300. In the embodiment of the present application, both the loss density and the temperature resistance level can represent the heat dissipation requirements of the electrical component 300. The heat dissipation teeth 441 are arranged adjacent to the electrical components 300 with higher loss density and lower temperature resistance level, and the heat dissipation teeth 441 can be used to specifically cool and dissipate the heat of the electrical components 300 with higher heat dissipation requirements. In one embodiment, the end surface of the heat dissipation teeth 441 along the first direction A can be circular, elliptical, square or diamond-shaped. Among them, the circular and elliptical heat dissipation teeth 441 are easier to process, and the square and diamond-shaped heat dissipation teeth 441 have a relatively better disturbing effect on the cooling water.

[0117] In one embodiment, the guide teeth 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 the turning point on the cooling water flow path, and the flow direction of the cooling water here usually undergoes a large change. If there is no guide tooth 442 to guide the flow of cooling water, part of the cooling water may accumulate in the corner area due to the slow flow speed during the turning process, forming a flow dead zone, which is not conducive to the uniform distribution of cooling water in the first water-cooled heat sink 400. The guide teeth 442 in the embodiment of the present application can force the cooling water to flow along the extension direction of the guide teeth 442, thereby improving the heat dissipation efficiency of the cooling water. In one embodiment, the end face of the guide tooth 442 along the first direction A may be straight, arc-shaped, sickle-shaped, or a combination of the above shapes.

[0118] Please continue reading Figure 3 In one embodiment, at least one of the guide teeth 442 or the heat dissipation teeth 441 on both sides of the first separation protrusion 421 is different in at least one of the number, shape or arrangement.

[0119] In the embodiment of the present application, the heat dissipation teeth 441 on both sides of the first partition protrusion 421 are different in at least one aspect of quantity, shape or arrangement. Alternatively, the flow guide teeth 442 on both sides of the first partition protrusion 421 are different in at least one aspect of quantity, shape or arrangement. Alternatively, the heat dissipation teeth 441 on both sides of the first partition protrusion 421 are different in at least one aspect of quantity, shape or arrangement, and the flow guide teeth 442 on both sides of the first partition protrusion 421 are different in at least one aspect of quantity, shape or arrangement.

[0120] In the embodiment of the present application, the second heat sink flow channel 432 is a U-shaped flow channel, that is, 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 are different. The embodiment of the present application adjusts the layout of the heat dissipation teeth 441 and the guide teeth 442, which is beneficial to reducing the difference in heat dissipation efficiency of cooling water at different positions in the second heat sink flow channel 432.

[0121] Please continue reading Figure 3 and Figure 4 In one embodiment, the first water-cooled heat sink 400 is integrated on the surface of the cover plate 100 away from the receiving groove 200 along the first direction A. The cover plate 100 includes a sealing plate 110 , which is distributed outside the receiving groove 200 and 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 with 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 on-board charger 11, which is conducive to realizing the lightweight design of the on-board charger 11 and optimizing the layout of the powertrain 10.

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

[0124] In one embodiment, the heat dissipation teeth 441 and the flow guide teeth 442 both protrude toward the sealing plate 110 along the first direction A, and the heat dissipation teeth 441 and the flow guide teeth 442 are both spaced apart from the sealing plate 110. In the embodiment of the present application, the cooling water 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 beneficial to reduce the flow resistance of the cooling water.

[0125] In one embodiment, the first water-cooled heat sink 400 includes a flow channel 451, the notch of the flow channel 451 faces the plurality of electrical components 300 away from the vehicle charger 11 along the first direction A, and the flow channel 451 is used to enclose the sealing plate 110. Among them, the first connecting hole 411, the second connecting hole 412, the third connecting hole 413, the fourth connecting hole 414, the first dividing protrusion 421, the second dividing protrusion 422, the heat dissipation teeth 441 and the guide teeth 442 are distributed at the bottom of the flow channel 451.

[0126] In the embodiment of the present application, the notch of the flow channel groove 451 is directed along the first direction A toward the outside of the receiving groove 200, which is beneficial to reducing the processing difficulty of the first water-cooled heat sink 400, and also facilitates disassembly of the sealing plate 110 to repair the first water-cooled heat sink 400, thereby reducing maintenance costs.

[0127] In one embodiment, the sealing plate 110 is sealed and connected to the notch of the flow channel groove 451. The embodiment of the present application is conducive to avoiding leakage of cooling water, improving the utilization rate of cooling water and heat dissipation effect.

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

[0129] The embodiment of the present application utilizes the bottom of the flow channel groove 451 and the sealing plate 110 to fix the first dividing protrusion 421 and the second dividing protrusion 422, which is beneficial to strengthen the structural strength of the first dividing protrusion 421 and the second dividing protrusion 422, and ensure that the first dividing protrusion 421 and the second dividing protrusion 422 can stably play the role of diversion and guidance.

[0130] In one embodiment, the first partition protrusion 421 and the second partition protrusion 422 are integrally formed with the cover plate 100. The embodiment of the present application is 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 divert the cooling water.

[0131] In one embodiment, at least one of the first partition protrusion 421 or the second partition protrusion 422 is a separate structure from the cover plate 100, and at least one of the first partition protrusion 421 or the second partition protrusion 422 is detachably connected to the cover plate 100. The embodiment of the present application makes the disassembly and assembly of the first partition protrusion 421 and the second partition protrusion 422 more flexible and convenient, and the position layout 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 dividing protrusion 421 or the second dividing protrusion 422 can rotate relative to the bottom of the flow channel 451. The embodiment of the present application is conducive to adjusting the flow rate of 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 be extended in a direction close to or away from the first partition protrusion 421. In one embodiment, the first partition protrusion 421 can be extended in a direction close to or away from the second partition protrusion 422. The embodiment of the present application is conducive to adjusting the flow rate of cooling water in the first water-cooled heat sink 400 and the second water-cooled heat sink 500 by changing the inner diameter of the diversion flow channel 800.

[0134] In one embodiment, the vehicle charger 11 further includes a multi-way valve, and the diversion channel 800 located between the first dividing protrusion 421 and the second dividing protrusion 422 is used to accommodate the multi-way valve, and the multi-way valve is used to divide the cooling water from one of the first heat sink channel 431 or the second heat sink channel 432 into multiple branches.

[0135] In one embodiment, the first water-cooled heat sink 400 is die-cast on the cover plate 100. In one embodiment, the first partition protrusion 421, the second partition protrusion 422, the heat dissipation teeth 441 and the guide teeth 442 are integrally die-cast with the 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 used to die-cast the first partition protrusion 421, the second partition protrusion 422, the heat dissipation teeth 441 and the guide teeth 442, which can reduce the processing difficulty of the first water-cooled heat sink 400.

[0136] In one embodiment, the second water-cooled heat sink includes two sheet metal parts, the two sheet metal parts are stacked along the first direction, and the edges of the two sheet metal parts are sealed by soldering. In the embodiment of the present application, the second water-cooled heat sink adopts a brazing process, which is conducive to reducing costs and achieving a lightweight design of the second water-cooled heat sink.

[0137] See also Fig.10 , Fig.10 A partial cross-sectional view of the cover plate 100 provided in an embodiment of the present application. In one 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 bottom of the flow channel groove 451 along the first direction A, and the diverter flow channel 800 is distributed in the gap between the first partition protrusion 421 and the second partition protrusion 422 and the sealing plate 110 along the first direction A. The length of the diverter flow channel 800 along the first direction A is less than the distance between the bottom of the flow channel groove 451 and the sealing plate 110. In one 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 diverter flow channel 800 is distributed in the gap between the first partition protrusion 421 and the second partition protrusion 422 and the bottom of the flow channel groove 451 along the first direction A. The length of the diverter flow channel 800 along the first direction A is less than the distance between the 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 bottom of the sealing plate 110 or the flow channel 451 to form a diversion channel 800, which is beneficial to adjust the flow rate of cooling water in the first water-cooled heat sink 400 and the second water-cooled heat sink 500.

[0139] In one embodiment, the first partition protrusion 421 and the second partition protrusion 422 are integrally formed with the sealing plate 110, and the first partition protrusion 421 and the second partition protrusion 422 are distributed on the surface of the sealing plate 110 along the first direction A toward the bottom of the flow channel groove 451. The embodiment of the present application is conducive to enhancing the structural strength of the first partition protrusion 421 and the second partition protrusion 422.

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

[0141] In one embodiment, the groove bottom of the flow channel groove 451 includes a buffer groove 4511, and the buffer groove 4511 is recessed toward the receiving groove 200 along the first direction A, and the first connecting hole 411 passes through the groove bottom of the buffer groove 4511. The area of ​​the notch of the buffer groove 4511 is greater than the area of ​​the groove bottom of the buffer groove 4511. The groove peripheral wall of the buffer groove 4511 is inclined from the notch of the buffer groove 4511 to the groove bottom of the buffer groove 4511. The cross section of the groove peripheral wall of the buffer groove 4511 along the first direction A is straight, arc-shaped or stepped.

[0142] In the embodiment of the present application, for the convenience of description, a buffer groove 4511 is recorded as a buffer groove 4511a. Since the opening of the first connecting hole 411 is toward the receiving groove 200 along the first direction A, the buffer groove 4511a is recessed toward the receiving groove 200 along the first direction A, and the first connecting hole 411 runs through the bottom of the buffer groove 4511a, so that the cooling water can flow from the first connecting hole 411 into the first water-cooled heat sink 400 more conveniently, shortening the path of the cooling water flowing into the first connecting hole 411. In this case, there is a height difference between the first connecting hole 411 and the bottom of the flow channel groove 451 except for the other parts of the buffer groove 4511a. The embodiment of the present application uses the peripheral wall of the buffer groove 4511a to play a transition and buffering role for the cooling water, thereby reducing the flow resistance loss caused by the height difference.

[0143] Please continue reading Figure 3 and Fig.11 In one embodiment, the groove bottom of the flow channel groove 451 further includes another buffer groove 4511, and the other buffer groove 4511 is recessed toward the receiving groove 200 along the first direction A, and the second connecting hole 412 passes through the groove bottom of the other buffer groove 4511. The area of ​​the notch of the other buffer groove 4511 is larger than the area of ​​the groove bottom of the other buffer groove 4511. The groove peripheral wall of the other buffer groove 4511 is inclined from the notch of the other buffer groove 4511 to the groove bottom of the other buffer groove 4511. The cross section of the groove peripheral wall of the other buffer groove 4511 along the first direction A is straight, arc-shaped or stepped.

[0144] In the embodiment of the present application, for the convenience of description, another buffer groove 4511 is recorded as buffer groove 4511b. Since the opening of the second connecting hole 412 is toward the receiving groove 200 along the first direction A, the buffer groove 4511b is recessed toward the receiving groove 200 along the first direction A, and the second connecting hole 412 runs through the bottom of the buffer groove 4511b, so that the cooling water can flow from the second connecting hole 412 into the external cooling system or the internal cooling channel more conveniently. In this case, there is a height difference between the second connecting hole 412 and the bottom of the flow channel groove 451 except for the buffer groove 4511a and the other parts of the buffer groove 4511b. The embodiment of the present application uses the groove wall of the buffer groove 4511b to play a transition and buffering role for the cooling water, thereby reducing the flow resistance loss caused by the height difference.

[0145] Please continue reading Figure 4 In one embodiment, the length of the first water-cooling heat sink 400 along the second direction B is greater than the length of the second water-cooling heat sink 500 , and the second direction B is perpendicular to the first direction A.

[0146] In the embodiment 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. The length of the first water-cooled heat sink 400 along the second direction B is greater than the length of the second water-cooled heat sink 500 along the second direction B, which can increase the contact area between the first water-cooled heat sink 400 and the hot air, and is conducive to reducing the temperature in the receiving tank 200. In addition, the first water-cooled heat sink 400 is integrated with the cover plate 100, and extending 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 receiving tank 200. The second water-cooled heat sink 500 is located in the receiving tank 200. If the length of the second water-cooled heat sink 500 along the second direction B is too long, it may also be necessary to consider the problem of avoiding the electrical components 300. In one embodiment, the second direction B is the length direction or width direction of the cover plate 100. In one embodiment, the area of ​​the first water-cooled heat sink 400 is greater than the area of ​​the second water-cooled heat sink 500.

[0147] Please refer to Figure 4 and Fig.12 , Fig.12 Schematic diagram of the cover plate 100 provided in an embodiment of the present application. In one embodiment, the surface of the cover plate 100 facing the receiving groove 200 along the first direction A is used to fix the circuit board 301, and the two opposite surfaces of the cover plate 100 and the circuit board 301 along the first direction A are used to fix the electrical component 300.

[0148] The surface of the cover plate 100 facing the receiving groove 200 along the first direction A includes a plurality of shielding protrusions 120. The plurality of shielding protrusions 120 protrude along the first direction A toward the bottom of the receiving groove 200, 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 facing away from the receiving slot 200 is integrated with the first water-cooled heat sink 400, and the surface of the cover plate 100 facing the receiving slot 200 is used to fix the electrical component 300, which can shorten the heat transfer path between the electrical component 300 and the first water-cooled heat sink 400 without occupying the space of the receiving slot 200, and can also reduce the risk of cooling water leakage. 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 the role of electromagnetic shielding for the electrical components 300 on both sides of the shielding protrusion 120, thereby improving electromagnetic compatibility.

[0150] In one embodiment, the surface of the cover plate 100 along the first direction A toward the receiving groove 200 includes a plurality of fixing protrusions 130, and the plurality of fixing protrusions 130 protrude toward the bottom of the receiving groove 200 along the first direction A, and the fixing protrusions 130 are used to fix the electrical component 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 component 300, which is equivalent to the cover plate 100 directly contacting the electrical component, which is conducive to increasing the heat exchange efficiency.

[0151] In one embodiment, along the first direction A, a projection of at least one electrical component 300 coincides with a projection of the first water-cooled heat sink 400 .

[0152] In one embodiment, the plurality of electrical components 300 may include a magnetic device 310 and a capacitor 320, and the magnetic device 310 and the capacitor 320 are arranged between the cover plate 100 and the circuit board 301 along the first direction A. In the embodiment of the present application, the first water-cooled heat sink 400 integrated in 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 sink 400 on the magnetic device 310 and the capacitor 320. In one embodiment, the magnetic device 310 includes a transformer and an inductor.

[0153] In one embodiment, if Figure 4As shown, the plurality of electrical components 300 may further include a power switch tube 330, and the surface of the circuit board 301 facing the second water-cooled heat sink 500 along the first direction A is used to fix the power switch tube 330, and the power switch tube 330 is 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 switch tube 330. The power switch tube 330 is used to participate in the power conversion process of the on-board charger 11, and the power switch tube 330 is more susceptible to vibration than the magnetic device 310 and the capacitor 320. Along the first direction A, the distance between the power switch tube 330 and the cover plate 100 is greater than the distance between the magnetic device 310, the capacitor 320 and the cover plate 100, and the power switch tube 330 is not distributed on the surface of the cover plate 100 facing the receiving groove 200, which can prevent the cover plate 100 from directly transmitting external vibration to the power switch tube 330, ensuring the normal operation of the power switch tube 330 and reducing heat generation.

[0154] Please continue reading Figure 3 and Fig.12 In one embodiment, the surface of the cover plate 100 along the first direction A facing the receiving groove 200 further includes a first communication interface 140 and a second communication interface 150. The surface of the second water-cooled heat sink 500 along the first direction A facing the cover plate 100 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 receiving groove 200. The first communication interface 140 is used to connect 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 connect 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 connect 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 with the cover plate 100 and fixed to 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 is also conducive to preventing cooling water from leaking during the flow 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 receiving groove 200, and the first communication interface 140 and the second communication interface 150 are spaced from the groove wall of the receiving groove 200. If the first communication interface 140 and the second communication interface 150 are integrated into the groove wall of the receiving groove 200, the overall thickness of the groove wall will increase, which is not conducive to the lightweight design of the vehicle charger 11, and will also increase the processing difficulty and cost of the receiving groove 200. The first communication interface 140 and the second communication interface 150 in the embodiment of the present application are separate structures from the receiving groove 200, which can avoid negative impacts on the processing of the receiving groove 200.

[0157] Please refer to Figure 3 and Figure 4 In one embodiment, the groove wall of the receiving groove 200 includes a first groove wall section 210 and a second groove wall section 220. The first groove wall section 210 and the second groove wall section 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] Among them, the distance between the first section of the groove wall 210 and the first connecting hole 411, the second connecting hole 412, the outlet of the shell water inlet channel 600 and the entrance of the shell water outlet channel 700 is smaller than the distance between the second section of the groove wall 220 and the first connecting hole 411, the second connecting hole 412, the outlet of the shell water inlet channel 600 and the entrance of the shell water outlet channel 700.

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

[0160] Please continue reading Figure 5 In one embodiment, the outlet of the shell water inlet channel 600 is used to communicate with the first communication hole 411 , and the orientation of the outlet of the shell water inlet channel 600 is the same as the orientation of the notch of the accommodating tank 200 .

[0161] The surface of the cover plate 100 facing the receiving groove 200 along the first direction A is used to fix the flow channel communication component 900. The flow channel communication component 900 is distributed outside the receiving groove 200, one end of the flow channel communication component 900 is used to cover the first communication hole 411, and the other end of the flow channel communication component 900 is used to be embedded in the outlet of the water inlet channel 600 of the shell.

[0162] In the embodiment of the present application, the flow channel connecting component 900 is used to connect the outlet of the shell water inlet flow channel 600 with the first connecting hole 411 of the first water-cooled heat sink 400. The shell water inlet flow channel 600 and the flow channel connecting component 900 are both distributed on the outside of the receiving groove 200, which is convenient for checking the connection. Among them, one end of the flow channel connecting component 900 covers the first connecting hole 411, and the other end of the flow channel connecting component 900 is embedded in the outlet of the shell water inlet flow channel 600, which is conducive to preventing cooling water from leaking at the connection between the flow channel connecting component 900 and the shell 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 the cooling water output by the first water-cooled heat sink 400 , and the outlet of the housing water outlet channel 700 is used to discharge the cooling water out of the on-board charger 11 .

[0164] 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 outside 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 connecting hole 412, and the second connecting hole 412 is embedded in the inlet of the shell water outlet flow channel 700. The direction of the outlet of the shell water outlet flow channel 700 intersects with the direction of the inlet of the shell water outlet flow channel 700.

[0165] In the embodiment of the present application, the first water-cooled heat sink 400 is integrated with the cover plate 100, and the cover plate 100 and the receiving tank 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 receiving tank 200, and the direction of the inlet of the shell water outlet flow channel 700 is opposite to the direction of the second connecting hole 412, which is conducive to shortening the transmission distance of the cooling water between the second connecting hole 412 and the shell water outlet flow channel 700. The outlet of the shell water outlet flow channel 700 is arranged on the outside of the receiving tank 200, and the second connecting hole 412 is embedded in the inlet of the shell water outlet flow channel 700, which can prevent the cooling water with a higher temperature from leaking into the receiving tank 200. The direction of the outlet of the shell water outlet flow channel 700 intersects with the direction of the inlet of the shell water outlet flow channel 700, changing the outflow direction of the cooling water from the outlet of the shell water outlet flow channel 700.

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

[0167] In one embodiment, the receiving slot 200 of the on-board charger 11 is an integrated shell. The receiving slot 200 includes a power supply cavity 230, a motor cavity 240 and a reducer cavity 250, the power supply cavity 230 is used to accommodate the on-board charger 11, the motor cavity 240 is used to accommodate the drive motor 12, and the reducer cavity 250 is used to accommodate the reducer 13.

[0168] In the embodiment of the present application, the on-board charger 11 is applied to the powertrain 10, and the receiving groove 200 of the on-board charger 11 can be used to accommodate the on-board charger 11 and the drive motor 12 and the reducer 13 of the powertrain 10, which is beneficial to improve the integration of the powertrain 10 and reduce the volume of the powertrain 10. Among them, the receiving groove 200 is an integrated shell, and the bottom wall of the power supply cavity 230 of the receiving 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 of the present application are far away from the bottom of the receiving groove, which can reduce the processing difficulty of the first water-cooled heat sink, and also facilitate the first water-cooled heat sink to be connected to the external cooling system through the first connecting hole and the second connecting hole. In addition, since the drive motor 12 and the reducer 13 rotate at high speed during operation, if the first water-cooled heat sink is integrated into the bottom wall of the power supply cavity 230, since the bottom wall is close to the drive motor 12 and the reducer 13, the flow of cooling water in the first water-cooled heat sink may be disturbed by the drive motor 12 and the reducer 13.

[0169] Please continue reading Figures 3 to 6 The embodiment of the present application also provides a vehicle charger 11, and the electrical component 300 of the vehicle charger 11 is used to charge and discharge the power battery 20 of the electric vehicle 1. The housing of the vehicle charger 11 includes a cover plate 100 and a receiving groove 200. The cover plate 100 is used to enclose the receiving groove 200 along the first direction A, and the receiving groove 200 is used to receive the electrical component 300 of the vehicle charger 11.

[0170] The three-dimensional water cooling circuit of the on-board charger 11 includes a first water-cooled heat sink 400, a second water-cooled heat sink 500, a diversion channel 800, a shell water inlet channel 600, and a shell water outlet channel 700. The first water-cooled heat sink 400 and the second water-cooled heat sink 500 are stacked 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 sink 400 includes a first dividing protrusion 421, a second dividing protrusion 422, a first connecting hole 411, a second connecting hole 412, a third connecting hole 413, and a fourth connecting hole 414. The first dividing protrusion 421 and the second dividing 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, and the flow dividing channel 800 is used to connect the first heat sink flow channel 431 and the second heat sink flow channel 432. The first dividing protrusion 421 is distributed between the first connecting hole 411 and the second connecting hole 412, and the second dividing protrusion 422 is distributed between the third connecting hole 413 and the fourth connecting hole 414.

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

[0173] In the embodiment of the present application, some electrical components 300 have high loss density and generate more heat during operation. The heat generated by electrical components 300 with high loss density will not only reduce their own working efficiency, but also cause negative impacts on electrical components 300 with lower temperature resistance levels. Among them, loss density refers to the energy loss density during operation, and temperature resistance level refers to the maximum allowable operating temperature.

[0174] To solve the above problems, the embodiment of the present application arranges the electrical component 300 along the first direction A between the first water-cooled heat sink 400 and the second water-cooled heat sink 500. The cooling water in the first water-cooled heat sink 400 and the second water-cooled heat sink 500 can cool the electrical component 300 from different angles, thereby realizing three-dimensional cooling of the electrical component 300, which is beneficial to expanding the cooling range of the cooling water in the electrical component 300 and avoiding the problem of insufficient local cooling.

[0175] In the embodiment of the present application, the shell water inlet channel 600 and the shell water outlet channel 700 are respectively used to realize the input and output of cooling water in the vehicle 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 renewal, which is beneficial to enhance the cooling effect of the first water-cooled heat sink 400 and the second water-cooled heat sink 500 on the electrical component 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 interconnected through the third connecting hole 413 and the fourth connecting hole 414. 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 connecting hole 411 and the shell water outlet channel 700 through the second connecting hole 412. The first connecting hole 411, the second connecting hole 412, the third connecting hole 413, and the fourth connecting hole 414 are all distributed on the first water-cooled heat sink 400, which is conducive to simplifying the structure of the three-dimensional water cooling circuit of the vehicle 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 series-parallel mixed cooling form according to the heat dissipation requirements of the electrical component 300, thereby improving the practicality 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 dividing protrusion 421 and the second dividing protrusion 422 are used to divide the first water-cooled heat sink 400 into the first heat sink flow channel 431 and the second heat sink flow channel 432. The embodiment of the present application utilizes the first dividing protrusion 421, the second dividing protrusion 422 and the flow diversion channel 800 to realize a series-parallel hybrid design in the first water-cooled heat sink 400 and the second water-cooled heat sink 500. Specifically, as Figure 6 As shown, after the cooling water flows from the first connecting hole 411 into the first heat sink flow channel 431, it is divided into two paths at the branch flow channel 800. One path of cooling water flows to the second water-cooled heat sink 500, and the other path of cooling water flows to the second heat sink flow channel 432. Since the second water-cooled heat sink 500 is connected to the first water-cooled heat sink 400, one path of cooling water will eventually flow from the second water-cooled heat sink 500 back to the second heat sink flow channel 432.

[0178] In an embodiment of the present application, the first water-cooled heat sink 400 and the second water-cooled heat sink 500 are mixed in series and parallel, which can comprehensively utilize the advantages of the series branch and the parallel branch. Among them, the flow rate of 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, which is beneficial to improving the cooling efficiency of the first water-cooled heat sink 400. The flow rate of 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 to the shell water inlet flow channel 600 and the shell water outlet flow channel 700 through the first water-cooled heat sink 400. The second water-cooled heat sink 500 includes a parallel branch, which is beneficial to reduce the flow resistance loss of 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 dividing protrusion 421 and the second dividing 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. The first heat sink flow channel 431 and the second heat sink flow channel 432 are connected through the diversion flow channel 800, so that the cooling water can flow in a pre-designed series-parallel mixed manner. If the first dividing protrusion 421 and the second dividing 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, the flow path of the cooling water may be relatively chaotic, and it is difficult to comprehensively exert the advantages of the series branch and the parallel branch.

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

[0181] In the embodiment of the present application, the diverter 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 is divided into two paths at the diverter channel 800. One path of cooling water flows to the second heat sink channel 432 and the second connecting hole 412 in sequence through the diverter channel 800, and the other path of cooling water flows through the third connecting hole 413, the second water-cooled heat sink 500 and the fourth connecting hole 414 in sequence and also flows into the second heat sink channel 432. The cooling water flows from the first connecting hole 411 to the diverter channel 800 and from the first connecting hole 411 to the fourth connecting hole 414 to form two parallel branches. The cooling water of the two parallel branches merges in the second heat sink channel 432 and flows to the second connecting hole 412, forming a series branch, forming a cooling method of first parallel and then series in the first water-cooled heat sink 400 and the second water-cooled heat sink 500. In the embodiment of the present application, the diverter channel 800 is integrated into the first water-cooled heat sink 400, which is beneficial for simplifying the overall structure of the three-dimensional water cooling circuit of the vehicle charger 11 while realizing a 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 flow channel 431 and the second heat sink flow 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 flow channel 432, and the second connecting hole 412 and the fourth connecting hole 414 are used to connect the first heat sink flow channel 431. Since the third connecting hole 413 and the fourth connecting hole 414 are respectively used to connect the inlet and the outlet of the second water-cooled heat sink 500, 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 the embodiment of the present application, after the cooling water flows from the first connecting hole 411 into the second heat sink flow channel 432, it is divided into two paths at the branch flow channel 800. One path of cooling water flows sequentially to the first heat sink flow channel 431 and the second connecting hole 412 through the branch flow channel 800, and the other path of cooling water flows sequentially through the third connecting hole 413, the second water-cooled heat sink 500, and the fourth connecting hole 414, and then flows sequentially to the first heat sink flow channel 431 and the second connecting hole 412. In this case, a cooling method of first series connection and then parallel connection is formed in 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 distance between the third connecting hole 413 and the fourth connecting hole 414 and the bypass channel 800, the first connecting hole 411, the second connecting hole 412, and the shape of the first dividing protrusion 421 and the second dividing protrusion 422, a cooling method of front-to-back series 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] See also Fig.14 , Fig.14 A partial schematic diagram of a vehicle charger 11 provided in an embodiment of the present application. In one 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 used to connect to 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 used to connect to the second heat sink flow channel 432 through the outlet of the flow channel of the second water-cooled heat sink 500.

[0185] In the embodiment of the present application, compared with Figure 6 , Fig.14 The position of the middle branch flow channel 800 changes. The cooling water flows from the first connecting hole 411 through the first heat sink flow channel 431 and the inlet of the second water-cooled heat sink 500 in sequence, and is divided into two paths at the branch flow channel 800. One path of cooling water flows to the fourth connecting hole 414 and the second heat sink flow channel 432 in sequence through the branch flow channel 800, and the other path of cooling water flows through the flow channel of the second water-cooled heat sink 500 and also flows into the second heat sink flow channel 432. In the 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 for cooling the electrical component 300.

[0186] See also Fig.15 , Fig.15 A partial schematic diagram of a vehicle charger 11 provided in an embodiment of the present application. In one embodiment, the surface of the first water-cooled heat sink 400 along the first direction A toward the second water-cooled heat sink 500 includes a first connecting interface 140 and a second connecting interface 150. The surface of the second water-cooled heat sink 500 along the first direction A toward the first water-cooled heat sink 400 is used to fix the first connecting interface 140 and the second connecting interface 150. The first connecting interface 140 is used to connect the third connecting hole 413 and the inlet of the flow channel of the second water-cooled heat sink 500, and the second connecting interface 150 is used to connect the fourth connecting hole 414 and the outlet of the flow channel of the second water-cooled heat sink 500.

[0187] The diverter channel 800 is distributed between the first connecting interface 140 and the second connecting interface 150 . The inlet of the diverter channel 800 is used to connect to the first heat sink channel 431 through the first connecting interface 140 , and the outlet of the diverter channel 800 is used to connect to the second heat sink channel 432 through the second connecting interface 150 .

[0188] In the embodiment of the present application, the first communication interface 140 and the second communication interface 150 are used to connect 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 with 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 is also conducive to preventing cooling water from leaking 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 flow divider 800 is distributed between the first communication interface 140 and the second communication interface 150, and the flow divider 800 is arranged between the first water-cooled heat sink 400 and the second water-cooled heat sink 500 along the first direction A, so as to achieve three-sided heat dissipation of the electrical component 300. Part of the second communication interface 150 is used to form a series branch, which is conducive to improving the cooling efficiency of the second communication interface 150 for the electrical component 300.

[0190] In the embodiment of the present application, the three-dimensional water cooling circuit of the on-board charger may include multiple shunt channels, and the multiple shunt channels are arranged at different positions according to the actual heat dissipation requirements of the electrical components. In one embodiment, at least one shunt channel is distributed in the gap between the first dividing protrusion and the second dividing protrusion, and at least one shunt channel is distributed between the inlet of the channel of the second water-cooled heat sink and the outlet of the channel of the second water-cooled heat sink.

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

[0192] In one embodiment, at least one branch 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 branch flow channel is distributed between the first connecting interface and the second connecting interface.

[0193] In one embodiment, at least one diversion channel is distributed in the gap between the first dividing protrusion and the second dividing protrusion, at least one diversion channel is distributed between the inlet of the channel of the second water-cooled heat sink and the outlet of the channel of the second water-cooled heat sink, and at least one diversion channel is distributed between the first connecting interface and the second connecting interface.

[0194] It should be noted that Fig.14 and Fig.15 The series and parallel mixed mode of the first water-cooled heat sink 400 and the second water-cooled heat sink 500 is only schematically shown, and the dotted arrows are only used to indicate the movement trend of the cooling water, which does not mean that the cooling water can only flow along the dotted arrows.

[0195] Please continue reading Figure 3 and Figure 4 In one embodiment, the first water-cooled heat sink 400 further includes a plurality of heat dissipation teeth 441 and a plurality of flow guide teeth 442 .

[0196] The first separation protrusion 421 is used to separate the first communication hole 411 and the second communication hole 412. A plurality of heat dissipation teeth 441 are distributed on both sides of the first separation protrusion 421, and a plurality of flow guide teeth 442 are distributed on both sides of the first separation 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 two adjacent heat dissipation teeth 441 is smaller than the gap between two adjacent flow guide teeth 442.

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

[0198] In the embodiment of the present application, the first partition protrusion 421 is used to separate the first connecting hole 411 and the second connecting hole 412, which is helpful to prevent the cooling water from flowing directly from the first connecting hole 411 to the second connecting hole. Heat dissipation teeth 441 and flow guide teeth 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 teeth 441 and the flow guide teeth 442. In one embodiment, part of the heat dissipation teeth 441 and part of the flow guide teeth 442 are also distributed on both sides of the second partition protrusion 422.

[0199] In the embodiment of the present application, according to the functions of the heat dissipation teeth 441 and the guide teeth 442, the heat dissipation teeth 441 and the guide teeth 442 can be arranged at different positions of the first water-cooled heat sink 400. In one embodiment, among 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 that overlap with the projection portion of the heat dissipation teeth 441 along the first direction A is higher than the loss density of other electrical components 300. In one embodiment, among 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 level of the electrical components 300 that overlap with the projection portion of the heat dissipation teeth 441 along the first direction A is lower than the temperature resistance level of other electrical components 300. In the embodiment of the present application, both the loss density and the temperature resistance level can represent the heat dissipation requirements of the electrical component 300. The heat dissipation teeth 441 are arranged adjacent to the electrical components 300 with higher loss density and lower temperature resistance level, and the heat dissipation teeth 441 can be used to specifically cool and dissipate the heat of the electrical components 300 with higher heat dissipation requirements. In one embodiment, the end surface of the heat dissipation teeth 441 along the first direction A can be circular, elliptical, square or diamond-shaped. Among them, the circular and elliptical heat dissipation teeth 441 are easier to process, and the square and diamond-shaped heat dissipation teeth 441 have a relatively better disturbing effect on the cooling water.

[0200] In one embodiment, the guide teeth 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 the turning point on the cooling water flow path, and the flow direction of the cooling water here usually undergoes a large change. If there is no guide tooth 442 to guide the flow of cooling water, part of the cooling water may accumulate in the corner area due to the slow flow speed during the turning process, forming a flow dead zone, which is not conducive to the uniform distribution of cooling water in the first water-cooled heat sink 400. The guide teeth 442 in the embodiment of the present application can force the cooling water to flow along the extension direction of the guide teeth 442, thereby improving the heat dissipation efficiency of the cooling water. In one embodiment, the end face of the guide tooth 442 along the first direction A may be straight, arc-shaped, sickle-shaped, or a combination of the above shapes.

[0201] Please continue reading Figure 3 In one embodiment, at least one of the guide teeth 442 or the heat dissipation teeth 441 on both sides of the first dividing protrusion 421 is different in at least one of the number, shape or arrangement.

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

[0203] Please continue reading Figure 3 and Figure 4 In one embodiment, the first water-cooled heat sink 400 includes a flow channel 451. The notch of the flow channel 451 faces the electrical component 300 away from the vehicle charger 11 along the first direction A, and the flow channel 451 is integrated on the surface of the cover plate 100 away from the receiving groove 200 along the first direction A.

[0204] The cover plate 100 includes a sealing plate 110. The sealing plate 110 is distributed outside the receiving groove 200, and the sealing plate 110 is used to cover the notch of the flow channel groove 451 along the first direction A.

[0205] In the embodiment of the present application, the flow channel 451 of the first water-cooled heat sink 400 is integrated with the cover plate 100, which is conducive to enhancing the structural strength of the flow channel 451. In addition, the embodiment of the present application can also improve the integration of the on-board charger 11, which is conducive to realizing the lightweight design of the on-board charger 11 and optimizing the layout of the powertrain 10.

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

[0207] 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 component 300. Specifically, when the electrical component 300 with loss density generates heat, causing the temperature in the receiving tank 200 to rise, the volume of the air expands and the density decreases after being heated, 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 with 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 is conducive to reducing the temperature in the receiving tank 200 and effectively improving the heat dissipation efficiency.

[0208] In the embodiment of the present application, the cooling water with relatively low temperature in the water inlet channel 600 of the shell flows into the first water-cooled heat sink 400 through the first connecting hole 411. The first water-cooled heat sink 400 is farther away from the bottom of the receiving tank 200 than the second water-cooled heat sink 500, which facilitates the heat exchange between the cooling water with relatively low temperature in the first water-cooled heat sink 400 and the rising hot air in the receiving tank 200, thereby reducing the temperature in the receiving tank 200.

[0209] Please continue reading Figures 3 to 6 In one embodiment, the surface area of ​​the first water-cooling heat sink 400 along the second direction B is greater than the surface area of ​​the second water-cooling heat sink 500 along the second direction B, and the second direction B is perpendicular to the first direction A.

[0210] In the embodiment 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. The surface area of ​​the first water-cooled heat sink 400 along the second direction B is greater than the surface area of ​​the second water-cooled heat sink 500 along the second direction B, which can increase the contact area between the first water-cooled heat sink 400 and the hot air, and is conducive to reducing the temperature in the receiving tank 200. In addition, the first water-cooled heat sink 400 is integrated with the cover plate 100, and extending 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 receiving tank 200. The second water-cooled heat sink 500 is located in the receiving tank 200. If the surface area of ​​the second water-cooled heat sink 500 along the second direction B is too large, it may also be necessary to consider the problem of avoiding the electrical components 300.

[0211] Please refer to Figure 4 and Fig.12 In one embodiment, the surface of the cover plate 100 along the first direction A facing the receiving 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 component 300 of the vehicle charger 11, and the surface of the circuit board 301 along the first direction A facing the cover plate is used to fix the electrical component 300.

[0212] In the embodiment of the present application, the surface of the cover plate 100 facing away from the receiving groove 200 is integrated with the first water-cooled heat sink 400, and the surface of the cover plate 100 facing the receiving groove 200 is used to fix the electrical component 300. The fixing protrusion 130 is a part of the cover plate 100, and the fixing protrusion 130 fixes the electrical component 300, which is equivalent to the cover plate 100 directly contacting the electrical component, and can shorten the heat transfer path between the electrical component 300 and the first water-cooled heat sink 400 without occupying the space of the receiving groove 200, and can also reduce the risk of cooling water leakage.

[0213] Please refer to Figure 4 and Figure 5 In one embodiment, the shell water inlet channel 600 and the shell water outlet channel 700 are distributed outside the receiving tank 200 .

[0214] In the embodiment of the present application, the shell water inlet flow channel 600 is connected to the flow channel of the first water-cooled heat sink 400 through the first connecting hole 411, and the shell water outlet flow channel 700 is connected to the flow channel of the first water-cooled heat sink 400 through the second connecting hole 412. The flow channel groove 451 is distributed on the surface of the cover plate 100 away from the bottom of the receiving tank 200, and the first connecting hole 411 and the second connecting hole 412 are distributed at the bottom of the flow channel groove 451. That is, the first connecting hole 411 and the second connecting hole 412 are closer to the outside of the receiving tank 200 relative to the second water-cooled heat sink 500. If the shell water inlet flow channel 600 and the shell water outlet flow channel 700 are distributed on the inner side of the receiving tank 200, the difficulty and processing cost of the shell water inlet flow channel 600 and the shell water outlet flow channel 700 connecting with the first water-cooled heat sink 400 will be increased, and the shell water inlet flow channel 600 and the shell water outlet flow channel 700 will also occupy the internal space of the receiving tank 200.

[0215] Please continue reading Figure 5 In one embodiment, the outlet of the shell water inlet channel 600 is used to communicate with the first communication hole 411 , and the orientation of the outlet of the shell water inlet channel 600 is the same as the orientation of the notch of the accommodating tank 200 .

[0216] The surface of the cover plate 100 along the first direction A facing the receiving tank 200 is used to fix the flow channel communication component 900, and the flow channel communication component 900 is distributed outside the receiving tank 200. One end of the flow channel communication component 900 is used to cover the first communication hole 411, and the other end of the flow channel communication component 900 is used to be embedded in the outlet of the water inlet channel 600 of the shell.

[0217] In the embodiment of the present application, the flow channel connecting component 900 is used to realize the connection between the outlet of the shell water inlet flow channel 600 and the first connecting hole 411 of the first water-cooled heat sink 400. The shell water inlet flow channel 600 and the flow channel connecting component 900 are both distributed on the outside of the receiving groove 200, which is convenient for checking the connection and reducing the difficulty of connection. Among them, one end of the flow channel connecting component 900 covers the first connecting hole 411, and the other end of the flow channel connecting component 900 is embedded in the outlet of the shell water inlet flow channel 600, which is conducive to preventing cooling water from leaking at the connection between the flow channel connecting component 900 and the shell water inlet flow channel 600 and the cover plate 100.

[0218] Please continue reading Figure 4 In one embodiment, the inlet of the housing water outlet channel 700 is used to receive the cooling water output by the first water-cooled heat sink 400 , and the outlet of the housing water outlet channel 700 is used to discharge the cooling water out of the on-board charger 11 .

[0219] The inlet of the shell water outlet flow channel 700 is distributed on the groove wall of the containing groove 200. The outlet of the shell water outlet flow channel 700 is distributed on the outside 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 connecting hole 412. The second connecting 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 sink 400 is integrated with the cover plate 100, and the cover plate 100 and the receiving tank 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 receiving tank 200, and the direction of the inlet of the shell water outlet flow channel 700 is opposite to the direction of the second connecting hole 412, which is conducive to shortening the transmission distance of the cooling water between the second connecting hole 412 and the shell water outlet flow channel 700. The outlet of the shell water outlet flow channel 700 is arranged on the outside of the receiving tank 200, and the second connecting hole 412 is embedded in the inlet of the shell water outlet flow channel 700, which can prevent the cooling water with a higher temperature from leaking into the receiving tank 200.

[0221] Please refer to Figure 3 and Figure 4 In one embodiment, the groove wall of the receiving groove 200 includes a first groove wall section 210 and a second groove wall section 220. The first groove wall section 210 and the second groove wall section 220 are arranged opposite to each other along a second direction B, and the second direction B is perpendicular to the first direction A.

[0222] Among them, the distance between the first connecting hole 411, the second connecting hole 412, the third connecting hole 413, the fourth connecting hole 414, the outlet of the shell water inlet channel 600 and the entrance of the shell water outlet channel 700 and the first section of the groove wall 210 is smaller than the distance between the first connecting hole 411, the second connecting hole 412, the third connecting hole 413, the fourth connecting hole 414, the outlet of the shell water inlet channel 600 and the entrance of the shell water outlet channel 700 and the second section of the groove wall 220.

[0223] In the embodiment of the present application, the first connecting hole 411, the second connecting hole 412, the third connecting hole 413 and the fourth connecting hole 414 are all adjacent to the first section of the groove wall 210 of the receiving groove 200, so that the first connecting hole 411, the second connecting hole 412, the third connecting hole 413 and the fourth connecting hole 414 are arranged compactly, which is conducive to reducing the processing difficulty and cost of the flow channel groove. Among them, the third connecting hole 413 and the fourth connecting hole 414 are adjacent to the first section of the groove wall 210 of the receiving groove 200, so that the first connecting interface 140 and the second connecting interface 150 are also close to the receiving groove 200 along the second direction B, which can increase the space in the receiving groove 200 for accommodating the electrical component 300. The first connecting hole 411 and the second connecting hole 412 are adjacent to the first section of the groove wall 210 of the receiving groove 200, so that the first connecting hole 411 and the second connecting hole 412 are connected to the shell water inlet flow channel 600 and the shell water outlet flow channel 700 distributed outside the receiving groove 200.

[0224] It should be noted that the first connecting hole 411, the second connecting hole 412, the third connecting hole 413 and the fourth connecting hole 414 are all close to the first section of the groove wall 210 of the accommodating groove 200, which does not mean that the path of the cooling water flowing from the first connecting hole 411 to the third connecting hole 413 and from the fourth connecting hole 414 to the second connecting hole 412 is necessarily shorter. Figure 6 and Figure 8 ,like Figure 8 As shown, the distance between the first section of the groove wall 210 and the third connecting hole 413 and the fourth connecting hole 414 is smaller than the distance between the second section of the groove wall 220 and the third connecting hole 413 and the fourth connecting hole 414, and the distance between the first section of the groove wall 210 and the first connecting hole 411 and the second connecting hole 412 is larger than the distance between the second section of the groove wall 220 and the first connecting hole 411 and the second connecting hole 412. Figure 6 and Figure 8 It can be seen that the length of the path between the first connecting hole 411, the second connecting hole 412 and the third connecting hole 413, the fourth connecting hole 414 is not only related to the relative positions of the four connecting holes, but also affected by the shape and layout of the first dividing protrusion 421 and the second dividing protrusion 422 and the position of the diversion channel 800.

[0225] In one embodiment, the distance between the first connecting hole, the second connecting hole and the first section of the groove wall is smaller than the distance between the first connecting hole, the second connecting hole and the second section of the groove wall. The distance between the third connecting hole, the fourth connecting hole and the second section of the groove wall is smaller than the distance between the third connecting hole, the fourth connecting hole and the first section of the groove wall. In the embodiment of the present application, the first connecting hole and the second connecting hole, the third connecting hole and the fourth connecting 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 cooling water between the first connecting hole and the third connecting hole, and between the second connecting hole and the fourth connecting hole.

[0226] The above is a detailed introduction to the on-board charger, powertrain and electric vehicle with a three-dimensional water cooling circuit provided by the embodiments of the present application. Specific examples are used in this article to illustrate the principles and embodiments of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those of ordinary skill in the art, according to the ideas of the present application, there will be changes in the specific embodiments and scope of application. In summary, the contents of this specification should not be understood as limiting the present application.

Claims

1. A vehicle charger with a three-dimensional water cooling circuit, characterized in that: The electrical components of the on-board charger are used to charge and discharge the power battery of the electric vehicle. The housing of the on-board charger includes a cover plate and a receiving groove. The cover plate is used to enclose the receiving groove along a first direction. The receiving groove is used to receive the electrical components of the on-board charger, wherein: The three-dimensional water cooling circuit of the on-board charger comprises a first water-cooled heat sink, a second water-cooled heat sink, a diversion channel, a shell water inlet channel and a shell water outlet channel, the first water-cooled heat sink and the second water-cooled heat sink are stacked along the first direction, and the electrical components of the on-board charger are arranged between the first water-cooled heat sink and the second water-cooled heat sink; The first water-cooled heat sink comprises a first dividing protrusion, a second dividing protrusion, a first connecting hole, a second connecting hole, a third connecting hole and a fourth connecting hole, the first dividing protrusion and the second dividing protrusion are used to divide the flow channel of the first water-cooled heat sink into a first heat sink flow channel and a second heat sink flow channel, the flow dividing flow channel is used to connect the first heat sink flow channel and the second heat sink flow channel, the first dividing protrusion is distributed between the first connecting hole and the second connecting hole, and the second dividing protrusion is distributed between the third connecting hole and the fourth connecting hole; The first connecting hole and the third connecting hole are distributed in the first heat sink flow channel, the second connecting hole and the fourth connecting hole are distributed in the second heat sink flow channel, the first heat sink flow channel is used to receive cooling water from the water inlet flow channel of the shell through the first connecting hole, the first heat sink flow channel is used to transport cooling water to the inlet of the flow channel of the second water-cooled heat sink through the third connecting hole, the second heat sink flow channel is used to receive cooling water from the outlet of the flow channel of the second water-cooled heat sink through the fourth connecting hole, the second heat sink flow channel is used to receive cooling water from the first heat sink flow channel through the diversion flow channel, and the second heat sink flow channel is used to transport cooling water to the water outlet flow channel of the shell through the second connecting hole.

2. The vehicle charger according to claim 1, characterized in that: The flow branching channel is distributed in the gap between the first dividing protrusion and the second dividing protrusion.

3. The vehicle charger according to claim 1, characterized in that: The branch 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 branch flow channel is used to connect to the flow channel of the first heat sink through the inlet of the flow channel of the second water-cooled heat sink, and the outlet of the branch flow channel is used to connect to the flow channel of the second heat sink through the outlet of the flow channel of the second water-cooled heat sink.

4. The vehicle charger according to claim 1, characterized in that: The surface of the first water-cooled heat sink along the first direction toward the second water-cooled heat sink includes a first communication interface and a second communication interface, and the surface of the second water-cooled heat sink along the first direction toward the first water-cooled heat sink is used to fix the first communication interface and the second communication interface, the first communication interface is used to connect 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 connect the fourth communication hole and the outlet of the flow channel of the second water-cooled heat sink; The diversion channel is distributed between the first connecting interface and the second connecting interface, the inlet of the diversion channel is used to connect to the first heat sink channel through the first connecting interface, and the outlet of the diversion channel is used to connect to the second heat sink channel through the second connecting interface.

5. The vehicle charger according to any one of claims 1 to 4, characterized in that: The first water-cooled heat sink further comprises a plurality of heat dissipation teeth and a plurality of flow guide teeth, wherein: The first dividing protrusion is used to separate the first connecting hole and the second connecting hole, the multiple heat dissipation teeth are distributed on both sides of the first dividing protrusion, the multiple guide teeth are distributed on both sides of the first dividing protrusion, the length of each guide tooth is greater than the length of each heat dissipation tooth, and the gap between two adjacent heat dissipation teeth is smaller than the gap between two adjacent guide teeth.

6. The vehicle charger according to claim 5, characterized in that: At least one of the guide teeth or the heat dissipation teeth on both sides of the first dividing protrusion is different in at least one of quantity, shape or arrangement.

7. The vehicle charger according to any one of claims 1 to 6, characterized in that: The first water-cooled heat sink includes a flow channel groove, the notch of the flow channel groove is oriented away from the electrical component of the on-board charger along the first direction, and the flow channel groove is integrated on a surface of the cover plate away from the receiving groove along the first direction; The cover plate includes a sealing plate, which is distributed on the outside of the accommodating groove and is used to cover the notch of the flow channel groove along the first direction.

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

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

10. The vehicle charger according to any one of claims 7 to 9, characterized in that: The shell water inlet flow channel and the shell water outlet flow channel are distributed on the outside of the containing groove.

11. The vehicle charger according to claim 10, characterized in that: The outlet of the water inlet channel of the shell is used to communicate with the first communicating hole, and the orientation of the outlet of the water inlet channel of the shell is the same as the orientation of the notch of the containing groove, wherein: The surface of the cover plate along the first direction toward the accommodating groove is used to fix the flow channel connecting component, and the flow channel connecting component is distributed on the outside of the accommodating groove. One end of the flow channel connecting component is used to cover the first connecting hole, and the other end of the flow channel connecting component is used to be embedded in the outlet of the water inlet channel of the shell.

12. The vehicle charger according to claim 11, characterized in that: The inlet of the shell water outlet channel is used to receive the cooling water output by the first water-cooled heat sink, and the outlet of the shell water outlet channel is used to discharge the cooling water out of the on-board charger, wherein: The inlet of the shell water outlet channel is distributed on the groove wall of the containing groove, the outlet of the shell water outlet channel is distributed on the outside of the containing groove, the direction of the inlet of the shell water outlet channel is opposite to the direction of the second connecting hole, and the second connecting hole is embedded in the inlet of the shell water outlet channel.

13. The vehicle charger according to claim 12, characterized in that: The groove wall of the receiving groove includes a first groove wall section and a second groove wall section, the first groove wall section and the second groove wall section are arranged relative to each other along a second direction, and the second direction is perpendicular to the first direction, wherein: The distance between each of the first connecting hole, the second connecting hole, the third connecting hole, the fourth connecting hole, the outlet of the water inlet channel of the shell and the inlet of the water outlet channel of the shell and the first section of the groove wall is smaller than the distance between each of the first connecting hole, the second connecting hole, the third connecting hole, the fourth connecting hole, the outlet of the water inlet channel of the shell and the inlet of the water outlet channel of the shell and the second section of the groove wall.

14. A powertrain, characterized in that: The power assembly includes a drive motor, a reducer and an on-board charger as described in any one of claims 1 to 13, wherein the on-board charger is used to charge and discharge the power battery, the power battery is used to supply power to the drive motor, and the drive motor is used to be transmission-connected to the reducer.

15. An electric vehicle, characterized in that: The electric vehicle comprises a power battery and a powertrain as claimed in claim 14, wherein the powertrain is used to receive power from the power battery and to drive wheels of the electric vehicle.

Images