CN215500288U - Controller of vehicle and vehicle - Google Patents

Abstract

The utility model discloses a controller of a vehicle and the vehicle, the controller of the vehicle includes: the control panel is installed on the bottom wall of the shell, the liquid cooling radiator is installed on the bottom wall of the shell, a liquid channel for refrigerant to flow is arranged in the liquid cooling radiator, the liquid cooling radiator is arranged at the bottom of the control panel, and the liquid cooling radiator is an extrusion-molded radiator. The extruded liquid cooling radiator can be formed into a radiator which is narrower and smaller than a cast radiator, and has a thin and high liquid channel size and form, so that the turbulence degree of a refrigerant flowing through the heat dissipation structure is improved, meanwhile, the thin and narrow structure increases the heat dissipation area, and the heat exchange performance can be further enhanced. And compared with a radiating fin forming structure of a casting process one-way drawing die, a more complex 3D radiating fin shape is used, so that a more complex and more detailed resistance and radiating optimization scheme can be adopted.

Description

Controller of vehicle and vehicle

Technical Field

The utility model relates to the technical field of vehicles, in particular to a controller of a vehicle and the vehicle.

Background

A main driving motor of a new energy automobile generally uses a controller based on an IGBT chip to provide current for the main driving motor. During the operation of the high-speed switch of the IGBT chip, loss and heat are brought. In order to ensure the normal operation of the IGBT chip, a certain heat dissipation structure is required to control the maximum temperature thereof to be below the limiting junction temperature.

Generally, a natural circulation air cooling heat dissipation structure is adopted for an IGBT chip with lower power density; most of the high-power-density IGBT chips pursuing extreme performance and size adopt a water-cooling heat dissipation structure. In order to enhance the heat exchange performance of the water-cooling structure of the IGBT chip, a plurality of groups of cooling liquid channels, which are parallel to each other or S-shaped, are generally designed at the bottom of the copper substrate of the IGBT chip and penetrate through the copper substrate of the IGBT chip. In order to increase the turbulence and heat dissipation area of the fluid and enhance heat transfer, a plurality of sets of fins in different forms such as straight lines, waves, cylinders, and water drops are generally designed. Some products flow multiple groups of cooling water channels through the IGBT chip copper substrate structure in an S-shaped, U-shaped, L-shaped distribution mode and the like.

In the related art, if the heat dissipation performance of the IGBT chip heat dissipation structure is insufficient or the flow resistance is too large, a heat dissipation structure with a larger size space has to be adopted, or when the IGBT chip is overheated due to approaching junction temperature, the power output of the motor is artificially reduced, which will limit the exertion of the maximum performance of the motor, and is not beneficial to the light weight of the electric drive system structure and the reduction of material cost.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a controller of a vehicle, the extruded liquid cooling radiator can generate a liquid channel with a size and a form which are narrower and thinner than those of a cast radiator, the heat exchange performance of the liquid cooling radiator can be enhanced, and a more complex 3D radiating fin shape is used compared with a radiating fin forming structure with a casting process and a unidirectional drawing mode, so that a more complex and more detailed resistance and radiating optimization scheme can be adopted.

The utility model also provides a vehicle

A controller of a vehicle according to an embodiment of a first aspect of the utility model includes: the control panel is installed on the bottom wall of the shell, the liquid cooling radiator is installed on the bottom wall of the shell, a liquid channel for refrigerant to flow is arranged in the liquid cooling radiator, the liquid cooling radiator is arranged at the bottom of the control panel, and the liquid cooling radiator is an extrusion-molded radiator.

According to the controller of the vehicle, the extruded liquid cooling radiator can form a liquid channel which is narrower, smaller and thinner than a cast radiator, so that the turbulence degree of a refrigerant flowing through the heat dissipation structure can be improved, meanwhile, the heat dissipation area is increased due to the thin structure, and the heat exchange performance can be further enhanced.

According to some embodiments of the utility model, the plurality of liquid channels comprises: the liquid cooling radiator comprises a first channel and a second channel which are different in shape, wherein the first channel and the second channel are multiple and are arranged in a staggered mode in the width direction of the liquid cooling radiator.

According to some embodiments of the utility model, the first channel has a height greater than a height of the second channel, the second channel extending from a middle portion to a bottom portion of the liquid-cooled heat sink.

According to some embodiments of the utility model, the first channel comprises: the first channel section is connected to the top of the second channel section, and the cross-sectional area of the first channel section is larger than that of the second channel section.

According to some embodiments of the utility model, the first channel section exhibits an increasing width in a direction extending from the bottom to the top of the liquid-cooled heat sink.

According to some embodiments of the utility model, the second channel has a tapered top cross-section, a rectangular middle cross-section, and a circular arc bottom cross-section.

According to some embodiments of the utility model, the liquid channel is provided with a raised portion and/or a recessed portion on the outer circumference, and both the raised portion and the recessed portion are arc-shaped.

According to some embodiments of the present invention, the bottom wall of the housing is provided with a mounting groove, two ends of the mounting groove are respectively formed with a first inclined surface and are respectively connected with the liquid inlet and the liquid outlet, two ends of the liquid cooling radiator are respectively formed with a second inclined surface, and the first inclined surface and the second inclined surface are in one-to-one correspondence and are correspondingly provided with a sealing gasket.

According to some embodiments of the utility model, the number of the control plates is at least one, the liquid cooling radiators are long, and at least one of the control plates is arranged at intervals in the length direction of the liquid cooling radiators.

According to a second aspect of the utility model, a vehicle includes the controller of the vehicle of the above embodiment.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic diagram of a controller according to an embodiment of the present invention;

FIG. 2 is an exploded view of one of the angles of the controller according to an embodiment of the present invention;

FIG. 3 is an exploded view of another angle of a controller according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view A of one of the angles of the controller according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view of another angle of the controller according to an embodiment of the present invention;

FIG. 6 is a partial cross-sectional view B of a liquid-cooled heat sink according to an embodiment of the present invention;

fig. 7 is a partial cross-sectional view C of a liquid-cooled heat sink according to an embodiment of the present invention.

Reference numerals:

100. a controller;

10. a housing; 11. mounting grooves; 12. a first inclined plane; 13. a liquid inlet; 14. a liquid outlet;

20. a control panel;

30. a liquid-cooled radiator; 31. a liquid channel; 32. a first channel; 321. a first channel segment; 322. a second channel segment; 33. a second channel; 34. a boss portion; 35. a recessed portion; 36. a second inclined plane;

40. and a gasket.

Detailed Description

Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.

A controller 100 of a vehicle according to an embodiment of the present invention is described below with reference to fig. 1 to 7, and the present invention also proposes a vehicle having the controller 100 described above.

As shown in fig. 1 to 5, a controller 100 of a vehicle according to an embodiment of a first aspect of the present invention includes: the control panel 20 is installed on the bottom wall of the shell 10, the liquid cooling radiator 30 is installed on the bottom wall of the shell 10, a liquid channel 31 for a refrigerant to flow is arranged in the liquid cooling radiator 30, and the liquid cooling radiator 30 is arranged at the bottom of the control panel 20. The control board 20 is composed of an IGBT chip and a substrate, wherein the substrate abuts against the top surface of the liquid-cooled heat sink 30.

That is, the liquid cooling radiator 30 and the housing 10 are separately arranged, that is, the liquid cooling radiator 30 may be made of aluminum material with better heat conductivity, so as to further enhance the heat exchange performance of the liquid cooling radiator 30. The liquid cooling radiator 30 does not need stress on internal parts during operation, salt spray corrosion, various mechanical loads and the like are not needed to be considered, namely the liquid cooling radiator 30 can be made of pure aluminum materials with low strength and good heat conduction and plasticity, so that the requirements on material performance are reduced, and the material cost is reduced.

The coolant in the liquid channel 31 is mainly glycol-water solution, and the inlet and outlet temperatures of the coolant are lower than the temperature of the control plate 20. Meanwhile, the coolant may be pure water, a mixture of water and other cooling media, a flowable heat-dissipating liquid composed of other inorganic substances, engine oil, a mixture of engine oil and other oily and/or aqueous materials, or the like.

In addition, as shown in fig. 5, the control board 20 is fixed to the housing 10 by means of the pressing bolt, so that the liquid-cooled heat sink 30 can be fixed between the control board 20 and the housing 10, thereby facilitating heat exchange between the control board 20 and the liquid-cooled heat sink 30.

The liquid-cooled heat sink 30 is an extruded heat sink. The extruded liquid-cooled heat sink 30 can be formed into a liquid channel 31 which is narrower, smaller and thinner than a cast heat sink, so that the turbulence of the refrigerant flowing through the liquid-cooled heat sink 30 is improved, and the heat-radiating area is increased due to the thin and narrow structure, thereby further enhancing the heat-exchanging performance of the liquid-cooled heat sink. The extruded liquid cooling radiator 30 can use pure aluminum material with lower strength and good plasticity, and the heat conductivity coefficient of the liquid cooling radiator 30 made of pure aluminum can be improved by about half relative to cast aluminum alloy, so that the overall heat exchange performance of the liquid cooling radiator 30 is further improved from the angle of the heat conductivity of the material. Meanwhile, metal materials with low strength, high heat conductivity coefficient and good plasticity, such as pure copper, brass, silver and the like, can also be adopted.

Moreover, the liquid cooling radiators 30 may be formed by cutting an extruded long-strip-shaped section bar, so that the liquid cooling radiators 30 before being cut may be mounted side by side on a machine tool for processing, and thus, multiple groups of liquid cooling radiators 30 may be processed at one time. In addition, when the surface of the liquid cooling radiator 30 is processed, only the upper surface and the lower surface of the liquid cooling radiator 30 and the two opposite side surfaces of the liquid channel 31 need to be processed, namely, only four surfaces need to be processed, so that the total processing amount and the processing difficulty of the liquid cooling radiator 30 are small, the processing efficiency is remarkably improved, and the manufacturing cost is reduced.

Therefore, the extruded liquid cooling radiator 30 can be formed into a radiator which is narrower and smaller than a cast radiator, and the size and the form of the liquid channel 31 are thin and high, so that the turbulence degree of a refrigerant flowing through the liquid cooling radiator 30 is improved, meanwhile, the thin and narrow structure increases the heat dissipation area, and the heat exchange performance can be further enhanced.

And, the casting molding can only be perpendicular to the direction of the fluid channel 2D fin form, and the extrusion molding can adopt the 3D form of more complicated fin shape in this direction, so, relative to the casting process unidirectional draft fin molding structure, use more complicated 3D fin shape, thus increased the further optimization heat dissipation and resistance performance's design space.

Referring to fig. 6 and 7, the plurality of liquid passages 31 includes: the first and second passages 32, 33 are different in shape, and the first and second passages 32, 33 are each provided in plurality and staggered in the width direction of the liquid-cooled heat sink 30. That is to say, be provided with the first passageway 32 and the second passageway 33 that a plurality of shapes are different on liquid cooling radiator 30, first passageway 32 and second passageway 33 crisscross setting each other, and two kinds of passageways all can carry out the heat transfer with control panel 20 like this, can promote control panel 20's radiating efficiency like this. In addition, the two channels are arranged in a staggered manner, so that the uniformity of heat dissipation of the control board 20 can be improved, that is, the heat dissipation efficiency at each position of the control board 20 is consistent, and thus the generation of local high temperature of the control board 20 can be avoided.

Referring to fig. 6 and 7, the first passage 32 has a height greater than the height of the second passage 33, and the second passage 33 extends from the middle to the bottom of the liquid-cooled heat sink 30. Wherein, the bottom of liquid cooling radiator 30 contacts with control panel 20, and the height of first passageway 32 is greater than the height of second passageway 33, makes first passageway 32 more be close to the bottom of liquid cooling radiator 30 like this, and like this, the heat of control panel 20 can be more rapid diffusion to be taken away by the refrigerant in the first passageway 32 to can promote control panel 20's radiating efficiency. The second channel 33 can also exchange heat with the first channel 32, so that after the heat of the control plate 20 enters the first channel 32, part of the heat enters the second channel 33, and the heat can be well diffused into the first channel 32 and the second channel 33 respectively, thereby further improving the heat dissipation efficiency of the control plate 20.

Referring to fig. 6 and 7, the first passage 32 includes: a first channel section 321 and a second channel section 322, the first channel section 321 being connected to the top of the second channel section 322, the cross-sectional area of the first channel section 321 being larger than the cross-sectional area of the second channel section 322. That is, the first passage section 321 is closer to the control board 20 than the second passage section 322, and the cross-sectional area of the first passage section 321 is larger, so that the size of the first passage section 321 opposite to the control board 20 is larger, so that the area of the control board 20 can be mostly covered by the first passage section 321, i.e., the heat dissipation efficiency of the control board 20 is stronger.

Specifically, as shown in fig. 6 and 7, the width of the first passage section 321 increases in a direction extending from the bottom to the top of the liquid-cooled heat sink 30. That is, the cross-sectional area of the first passage section 321 is larger than that of the second passage section 322 by the first passage section 321 having an increasing tendency in the width direction, which is arranged such that the width of the first passage section 321 near the control plate 20 has the largest dimension, so that the heat of the control plate 20 is well introduced into the first passage section 321.

That is, the width of the first channel section 321 near the control plate 20 is larger, and the flow resistance to the refrigerant is smaller, so that the refrigerant with relatively more flow rate and flow velocity and the heat convection capability thereof can be concentrated on the surface near the control plate 20; on the side away from the control plate 20, the flow resistance is slightly higher and the convective heat transfer capability is slightly lower due to the narrow and dense liquid channels 31.

Referring to fig. 5, the first passage 32 located at the center line of the cross section of the liquid-cooled heat sink 30 is a central symmetrical plane of the liquid passage 31, and the other liquid passages 31 are arranged symmetrically along the left and right sides of the liquid-cooled heat sink. When the width of the liquid cooling heat sink 30 is insufficient, the outer side surfaces of the first channel sections 321 of the first channels 32 located at the two ends are vertical surfaces, the inner side surfaces are inclined surfaces inclining inwards, and the two side surfaces of the first channel sections 321 of the first channels 32 located between the two ends are inclined surfaces which are far away from each other upwards. Of course, when the width of the liquid-cooled heat sink 30 is sufficient, it may be the entire first passage 32 or the second passage 33.

Referring to fig. 6 and 7, the second channel 33 has a tapered top cross-section, the second channel 33 has a rectangular middle cross-section, and the second channel 33 has a circular arc bottom cross-section. That is, the second channel 33 may be tapered on a side facing the control plate 20, so as to increase a flow velocity of the refrigerant on a side of the second channel 33 close to the control plate 20, thereby increasing a heat exchange efficiency of the second channel 33. And, the second passage 33 is formed in a circular arc shape at a side away from the control plate 20, so that the flow velocity of the refrigerant is reduced at this point, which can prevent the flow velocity of the second passage 33 near the control plate 20 from being affected.

And, the number of the liquid passages 31 is gradually reduced in the direction from the bottom surface to the top surface of the liquid-cooled radiator 30. Wherein the height of the second passage 33 is approximately half of the thickness of the entire liquid-cooled heat sink 30, and the height of the first passage 32 is approximately the same as the thickness of the liquid-cooled heat sink 30, so that the first passage 32 can better exchange heat with the control plate 20.

Referring to fig. 6 and 7, the plurality of first passages 32 and the plurality of second passages 33 are symmetrically distributed about a vertical plane extending in the longitudinal direction of the liquid-cooled heat sink 30. That is to say, the first channels 32 and the second channels 33 are uniformly distributed on two sides of the vertical plane of the liquid cooling radiator 30, so that the first channels 32 and the second channels 33 can be uniformly distributed in the width direction of the liquid cooling radiator 30, and therefore, the heat exchange between the liquid cooling radiator 30 and the control board 20 is more uniform, and the generation of local high temperature is avoided.

As shown in fig. 6 and 7, the cross-sections formed between the first channel 32 and the second channel 33 and between the first channel 32 and the first channel 32 are non-uniformly arranged in a Y-shape, so that the flow rate of the refrigerant far from or near the control plate 20 and the corresponding relationship between different convection heat transfer capacities can be controlled. And, along with the gradual increase of liquid cooling radiator 30 and control panel 20 one side distance, be close to the liquid passage 31 department of control panel 20 bottom surface one side relatively, the difference in temperature of its temperature and refrigerant is littleer relatively, then heat transfer capacity descends, so, liquid cooling radiator 30 is in the side surface that closes on control panel 20, promotes convection heat transfer capacity through the increase velocity of flow mode, and keeps away from control panel 20 one side through the increase heat transfer area mode of more tiny passageways to heat transfer performance has been promoted.

In addition, the liquid cooling radiator 30 manufactured by the extrusion process is obviously reduced in thickness on one side, close to the control board 20, of the liquid cooling radiator 30 relative to the liquid cooling radiator 30 manufactured by the casting process, and the width between the first channel 32 and the second channel 33 is reduced, so that the effective heat transfer surface area is increased under the same overall dimension while the metal heat conduction resistance in the liquid cooling radiator 30 is reduced, and the overall heat exchange performance of the liquid cooling radiator 30 is improved. And, the liquid cooling radiator 30 manufactured by adopting the extrusion process can reduce the use of aluminum materials, and simultaneously can optimize the heat transfer and flow resistance performance of the liquid cooling radiator 30 more greatly and pertinently compared with the box body of the integrated control box formed by casting.

The liquid cooling heat sink 30 has a rectangular structure, i.e., the refrigerant flows from one end of the rectangle to the other end of the rectangle, so that the refrigerant mainly flows along a straight line, thereby reducing the eddy current loss generated at the positions of the refrigerant, such as bending and abrupt change of section, and reducing the total flow resistance loss of the refrigerant.

As shown in fig. 7, the liquid passage 31 is provided on the outer periphery thereof with a convex portion 34 and/or a concave portion 35, and both the convex portion 34 and the concave portion 35 are circular arc-shaped. By locally adding small-sized lands or depressions 35 on the inner surface of the liquid channel 31, heat exchange between the refrigerant and the first channel 32 or the second channel 33 can be enhanced. The convex portion 34 and the concave portion 35 are circular arcs and mainly adopt a semi-circular, semi-elliptical and other rounded transition size forms, and the overall size of the convex portion and the concave portion is far smaller than the width and the height of the first channel 32 or the second channel 33. The convex portions 34 and the concave portions 35 are arranged in a circular array along the inner contour line of the liquid passage 31, and generally, the array is equally spaced, or may be in a gradually-varying, equally-spaced, or unequally-spaced array form.

In addition, the cross-sectional shape of the liquid channel 31 can adopt a transition structure with round details, so that the flow resistance of the refrigerant can be reduced, and the pump power loss of the automobile thermal management system can be improved. Moreover, the rounded transition structure can facilitate production and ensure the service life of the extrusion die.

As shown in fig. 5, the bottom wall of the housing 10 is provided with a mounting groove 11, first inclined planes 12 are respectively formed at two ends of the mounting groove 11, the first inclined planes 12 are respectively connected with a liquid inlet 13 and a liquid outlet 14, second inclined planes 36 are respectively formed at two ends of the liquid cooling radiator 30, the first inclined planes 12 and the second inclined planes 36 are in one-to-one correspondence, and sealing gaskets 40 are correspondingly arranged. Therefore, the first inclined planes 12 are arranged at the two ends of the mounting groove 11, and the second inclined planes 36 are arranged at the two ends of the liquid cooling radiator 30, so that a guide structure can be formed between the first inclined planes 12 and the second inclined planes 36, and the liquid cooling radiator 30 and the mounting groove 11 are convenient to mount and cooperate. Moreover, after the liquid cooling radiator 30 is installed in the installation groove 11, the installation stability of the liquid cooling radiator 30 and the installation groove 11 can be improved, so that the liquid cooling radiator 30 cannot be separated from the installation groove 11. Further, a gasket 40 is provided between the first inclined surface 12 and the second inclined surface 36, and the liquid passage 31 and the liquid inlet 13 and the liquid outlet 14 can be communicated by the gasket 40.

In addition, the second inclined planes 36 at the two ends of each group of liquid cooling radiators 30 respectively form an included angle of 45 degrees with the upper and lower surfaces of the liquid cooling radiators 30 in the length direction, and the second inclined planes 36 at the two sides are in a parallel relationship, so that the liquid cooling radiators 30 can be conveniently sawed in a front-back mode, the material waste in the manufacturing process can be reduced, and the sealing of the refrigerant can be conveniently realized.

As shown in fig. 1 to fig. 3, at least one of the control boards 20 may be provided, the liquid-cooled heat sink 30 has an elongated shape, and the at least one control board 20 is disposed at intervals in a length direction of the liquid-cooled heat sink 30. That is to say, the liquid cooling radiator 30 may be provided with at least two control panels 20, and the at least two control panels 20 may be disposed at intervals in the length direction of the liquid cooling radiator 30, so that the heat dissipation of the at least two control panels 20 may be realized by using one liquid cooling radiator 30, which not only facilitates the arrangement of the at least two control panels 20, but also facilitates the heat dissipation of the at least two control panels 20, wherein the number of the control panels 20 is not limited to several or several tens. In addition, the extruded liquid-cooled heat sink 30 can design the distance between at least two control boards 20 to be closer, which can improve the design integration of the whole controller 100, thereby reducing the external dimensions of the controller 100 and the material cost of the housing 10. Of course, only one control board 20 may be disposed on the liquid-cooled heat sink 30, and the control board 20 may be disposed in the longitudinal direction of the liquid-cooled heat sink 30.

Further, the liquid-cooled heat sink 30 is located on the length direction center line of the control board 20, and the positions of the liquid inlet 13 and the liquid outlet 14 may be set according to the actual spatial layout of the controller 100, alternatively, the liquid inlet 13 and the liquid outlet 14 may be located on and near the length direction center line of the control board 20.

The vehicular vehicle according to the embodiment of the second aspect of the utility model includes the controller 100 of the vehicle of the above-described embodiment.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A controller of a vehicle, characterized by comprising:

a housing;

a control panel mounted on a bottom wall of the housing;

the liquid cooling radiator is installed on the bottom wall of the shell, a liquid channel for a refrigerant to flow is arranged in the liquid cooling radiator, the liquid cooling radiator is arranged at the bottom of the control panel, and the liquid cooling radiator is an extrusion-molded radiator.

2. The controller of the vehicle according to claim 1, wherein the plurality of liquid passages include: the liquid cooling radiator comprises a first channel and a second channel which are different in shape, wherein the first channel and the second channel are multiple and are arranged in a staggered mode in the width direction of the liquid cooling radiator.

3. The controller of a vehicle of claim 2, wherein a height of said first passage is greater than a height of said second passage, said second passage extending from a middle portion to a bottom portion of said liquid-cooled radiator.

4. The controller of the vehicle according to claim 3, characterized in that the first channel includes: the first channel section is connected to the top of the second channel section, and the cross-sectional area of the first channel section is larger than that of the second channel section.

5. The controller of a vehicle of claim 4, wherein a width of said first channel section increases in a direction extending from a bottom to a top of said liquid-cooled radiator.

6. The controller for a vehicle according to claim 3, wherein a top cross section of the second passage is tapered, a middle cross section of the second passage is rectangular, and a bottom cross section of the second passage is circular arc-shaped.

7. The controller for a vehicle according to claim 1, wherein a projection and/or a recess are provided on an outer periphery of the liquid passage, and both the projection and the recess are arc-shaped.

8. The controller of vehicle according to claim 1, wherein the bottom wall of the housing is provided with a mounting groove, two ends of the mounting groove are respectively formed with a first inclined surface and are respectively connected with the liquid inlet and the liquid outlet, two ends of the liquid cooling radiator are respectively formed with a second inclined surface, and the first inclined surface and the second inclined surface are correspondingly provided with a sealing gasket.

9. The vehicle controller according to claim 1, wherein at least one of the control boards is provided, the liquid-cooled radiator is elongated, and at least one of the control boards is provided at intervals in a longitudinal direction of the liquid-cooled radiator.

10. A vehicle, characterized by comprising: a controller of the vehicle of any one of claims 1-9.

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