Motor cooling system for a vehicle and method for controlling the same

Abstract

The application discloses a motor heat dissipation system of a vehicle and a control method thereof, and relates to the technical field of motor heat dissipation equipment. The motor heat dissipation system comprises a radiator and a fixed cross beam, the radiator is arranged on the fixed cross beam, and the fixed cross beam is arranged at the rear end of a vehicle frame. Heat exchange pipelines are arranged to respectively penetrate the radiator and a driving motor of the vehicle, and are attached to the inner walls of the radiator and the driving motor respectively, so that the heat generated by the driving motor is transferred to the radiator. An air conditioner is arranged to cool the heat exchange pipelines. The radiator of the motor is arranged at the rear part of the vehicle body, so that the front overhang size can be greatly shortened, and the radiator is cooled by the air conditioner, so that the cooling efficiency of the motor is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motor heat dissipation equipment, and in particular to a motor heat dissipation system for a vehicle and a control method thereof. Background Art

[0002] Comparative document 1, CN201710270500.0, discloses a parallel cooling system and method for dual motors in a new energy vehicle. The system comprises: a front drive motor cooling circuit containing the front drive motor; and a rear drive motor cooling circuit containing the rear drive motor; wherein the front drive motor cooling circuit and the rear drive motor cooling circuit are connected in parallel and share a motor radiator assembly. The rear drive motor cooling circuit also includes a first pump and a first switching valve; the front drive motor cooling circuit also includes a second pump and a second switching valve; the first switching valve, the second pump, and the motor radiator assembly are respectively connected to a first three-way connector, and the second switching valve, the motor radiator assembly, and the rear drive motor are respectively connected to a second three-way connector.

[0003] Comparative document 2 CN201720841887.6 discloses a cooling system for a hydrogen fuel cell passenger car, which is arranged at the front of the vehicle and includes a hydrogen fuel cell radiator, an air-conditioning condenser, a drive motor and its controller radiator, and an electrical component radiator. The hydrogen fuel cell radiator and air-conditioning condenser are arranged directly in front of the vehicle, and the drive motor and its controller radiator and the electrical component radiator are respectively arranged on both sides of the hydrogen fuel cell radiator and the air-conditioning condenser. An air intake grille is provided in front of each radiator, and the air intake grille is arranged opposite to the radiator. The air intake grille is an active air intake grille integrated in the front bumper.

[0004] Among them, in comparative document 1, the motor is cooled directly through the radiator without considering cooling the radiator itself.

[0005] In the second comparative document, the radiator is arranged in a traditional manner, which is generally arranged at the front of the vehicle body. Summary of the Invention

[0006] The purpose of the present invention is to provide a motor cooling system for a vehicle and a control method thereof. The motor radiator is arranged at the rear of the vehicle body, which can greatly shorten the front overhang size, and the radiator is cooled by air conditioning, thereby improving the cooling efficiency of the motor.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] The first aspect of the embodiment of the present application provides a motor heat dissipation system of a vehicle, comprising: a heat sink and a fixed crossbeam, the heat sink is arranged on the fixed crossbeam, and the fixed crossbeam is arranged at the rear end of a frame of the vehicle; a heat exchange pipeline, the heat exchange pipeline is respectively penetrated through the heat sink and a driving motor of the vehicle, and respectively adheres to the inner wall of the heat sink and the inner wall of the driving motor, so as to transfer the heat generated by the driving motor to the heat sink; and an air conditioner, the air conditioner is used for cooling the heat exchange pipeline.

[0009] In some embodiments, the motor heat dissipation system further comprises a fluid pump, the fluid pump is arranged on the heat exchange pipeline, so as to drive the cooling fluid to flow in the heat exchange pipeline.

[0010] In some embodiments, the motor heat dissipation system further comprises a heat exchanger, the heat exchange pipeline is further penetrated through one end of the heat exchanger, and adheres to the inner wall of the heat exchanger, so as to conduct the heat to the heat exchanger, and the air conditioner is used for cooling the heat exchanger.

[0011] In some embodiments, the refrigeration pipe of the air conditioner is penetrated through the other end of the heat exchanger, and adheres to the inner wall of the heat exchanger, so as to cool the heat exchanger.

[0012] In some embodiments, the upper part of the frame of the vehicle is provided with a vehicle floor, the vehicle floor is provided with a through opening, the heat exchanger is arranged on the upper side of the vehicle floor, the heat sink, the fixed crossbeam and the driving motor of the vehicle are all arranged on the lower side of the vehicle floor, and the heat exchange pipeline is penetrated through one end of the heat exchanger through the through opening.

[0013] In some embodiments, the air conditioner comprises a fan, the fan is arranged on the upper side of the vehicle floor, and is used for cooling the indoor of the vehicle.

[0014] In some embodiments, the heat sink is provided with L-shaped connecting blocks at two ends, one end of the L-shaped connecting block is detachably connected with the side wall of the heat sink, and the other end of the L-shaped connecting block is detachably connected with the fixed crossbeam.

[0015] In some embodiments, the two ends of the fixed crossbeam are connected with the bottom of the two ends of the frame through screw rods.

[0016] The second aspect of the embodiment of the present application provides a control method of a motor heat dissipation system of a vehicle, and the method comprises the following steps: acquiring driving motor power in real time; when the driving motor power is lower than or equal to a preset threshold, closing the heat exchanger and opening the radiator to cool the driving motor through the radiator; when the driving motor power is higher than the preset threshold, opening the radiator to cool the driving motor through the radiator, and opening the heat exchanger to cool the radiator through the heat exchanger.

[0017] The third aspect of the embodiment of the present application provides a control method of a motor heat dissipation system of a vehicle, and the method comprises the following steps: acquiring driving motor temperature in real time; when the driving motor temperature is lower than or equal to a preset threshold, closing the heat exchanger and opening the radiator to cool the driving motor through the radiator; when the driving motor temperature is higher than the preset threshold, opening the radiator to cool the driving motor through the radiator, and opening the heat exchanger to cool the radiator through the heat exchanger.

[0018] According to the motor heat dissipation system of a vehicle and the control method thereof, at least the following beneficial effects are achieved: 1. The motor radiator is arranged at the rear of the vehicle body, which is obviously different from the previous form, and can greatly shorten the front suspension size and reduce the influence on the front suspension.

[0019] 2. The motor radiator is arranged at the rear, and when the vehicle type is a rear motor, the small three-electricity is also at the rear, and the devices that need to be cooled are all at the rear, so the radiator is also at the rear, which can greatly shorten the length of the pipeline connected to each other and reduce the cost.

[0020] 3. The radiator is arranged at the rear of the vehicle frame in an integrated manner, and a hidden design is adopted, so that the whole vehicle does not need to consider the grille.

[0021] 4. The radiator is arranged on the vehicle frame, and in the previous design, the radiator is arranged on the vehicle body, and the current design can reduce the collision and the shaking of the pipeline.

[0022] 5. In the design, the air conditioner and the radiator exchange heat through the heat exchanger, which can quickly and effectively cool the motor.

[0023] It should be understood that the above general description and the following detailed description are only exemplary and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and all other drawings obtained by those of ordinary skill in the art without creative effort based on these drawings are within the scope of the present application.

[0025] Figure 1 Structure diagram of the motor heat dissipation system according to the embodiment with the vehicle floor;

[0026] Figure 2 Structure diagram of the motor heat dissipation system according to the embodiment without the vehicle floor;

[0027] Figure 3 Structure diagram of a part of the motor heat dissipation system according to the embodiment;

[0028] Figure 4 Structure diagram of another part of the motor heat dissipation system according to the embodiment;

[0029] Figure 5 Bottom view of the connection between the vehicle frame and the fixed crossbeam according to the embodiment.

[0030] The reference signs are explained as follows: 1, radiator; 2, fixed crossbeam; 3, vehicle frame; 4, heat exchange pipeline; 5, fluid pump; 6, heat exchanger; 7, refrigeration pipeline; 8, vehicle floor; 9, through opening; 10, fan; 11, L-shaped connecting block; 12, driving motor. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of the present application.

[0032] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and thus cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus cannot be understood as a limitation on the present application.

[0033] The terms "first", "second", "third", "etc." are used only for descriptive purposes and should not be construed as implying or suggesting relative importance or an indicated number of the technical features indicated. Thus, the features defined with "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0034] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "communication", "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the examples set forth herein; rather, these example implementations are provided so that this disclosure will be thorough and complete, and will fully convey the inventive concept of the example implementations to those skilled in the art. The accompanying drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification. The drawings are not necessarily to scale, the same reference numerals in the drawings refer to the same or similar portions, and thus repeated description thereof will be omitted.

[0036] The following detailed description of implementations refers to the accompanying drawings, that show common prior art examples. Figures 1 to 5 The preferred embodiments of the present disclosure are further elaborated.

[0037] Please refer to Figure 2 .

[0038] According to some embodiments, the present application provides a motor cooling system of a vehicle, comprising: a radiator 1 and a fixed crossbeam 2, the radiator 1 is arranged on the fixed crossbeam 2, and the fixed crossbeam 2 is arranged at the rear end of the frame 3 of the vehicle; heat exchange pipes 4, the heat exchange pipes 4 respectively penetrate the radiator 1 and the driving motor 12 of the vehicle, and respectively adhere to the inner wall of the radiator 1 and the inner wall of the driving motor 12, so as to transfer the heat generated by the driving motor 12 to the radiator 1; an air conditioner, the air conditioner is used for cooling the heat exchange pipes 4.

[0039] Based on the above embodiment, the radiator 1 and the fixed crossbeam 2 are detachably connected, so as to facilitate the replacement of the radiator 1 when the radiator 1 is damaged. The radiator 1 is arranged on the top of the fixed crossbeam 2, and the fixed crossbeam 2 is arranged at the rear end of the frame 3 of the vehicle.

[0040] Further, the heat exchange pipe 4 is respectively penetrated through the radiator 1 and the driving motor 12 of the vehicle, and respectively adheres to the inner wall of the radiator 1 and the inner wall of the driving motor 12, so as to quickly transfer the heat generated by the driving motor 12 to the radiator 1. When the driving motor 12 of the vehicle is started, the heat of the driving motor 12 of the vehicle is transferred from the heat exchange pipe 4 to the radiator 1, the radiator 1 is made of a material with good heat conduction performance, the radiator 1 transfers the heat to the air to complete the heat dissipation and cooling of the driving motor 12. Wherein, the heat exchange pipe 4 is detachably connected with the radiator 1 and the driving motor 12 of the vehicle, so as to facilitate the replacement of the heat exchange pipe 4 when the heat exchange pipe 4 is damaged.

[0041] Further, the air conditioner is further included to cool the heat exchange pipe 4, so as to cool the radiator 1 and accelerate the cooling speed of the driving motor 12 by the heat exchange pipe 4.

[0042] The application has the following advantages:

[0043] 1. The motor radiator 1 is arranged at the rear of the vehicle body, which is obviously different from the previous form, can greatly shorten the front suspension size, and reduce the influence on the front suspension.

[0044] 2. The motor radiator 1 is arranged at the rear, when the vehicle model is rear motor, small three electric is also at the rear, the devices that need to be cooled are all at the rear, and the radiator 1 is also at the rear, so that the length of the pipeline connected with each other can be greatly shortened, and the cost is reduced.

[0045] 3. The radiator 1 is arranged at the rear of the vehicle frame 3 in an integrated manner, and a hidden design is adopted, so that the whole vehicle does not need to consider the grille.

[0046] 4. The radiator 1 is arranged on the vehicle frame 3, which is arranged on the vehicle body in the previous way, and the current design can reduce the collision and the shaking of the pipeline.

[0047] 5. In the design, the air conditioner is considered to cool the radiator 1, so that the motor can be further quickly and effectively cooled.

[0048] Please refer to Figure 4 .

[0049] According to some embodiments, the motor cooling system further comprises a fluid pump 5, and the fluid pump 5 is arranged on the heat exchange pipe 4 to drive the cooling fluid to flow in the heat exchange pipe 4.

[0050] Based on the above embodiment, the heat exchange pipe 4 is filled with cooling fluid. When the driving motor 12 is working, the fluid pump 5 pumps the cooling fluid to flow in the heat exchange pipe 4. The cooling fluid flows to the driving motor 12. The driving motor 12 transmits its heat to the heat exchange pipe 4. The heat exchange pipe 4 transmits the heat to the cooling fluid. The cooling fluid carries the heat to the radiator 1 to dissipate the heat. Then the cooling fluid continues to flow to the driving motor 12, and the circulation is repeated to accelerate the heat dissipation of the driving motor 12. The cooling fluid is a liquid with good heat conductivity.

[0051] Please refer to Figures 1 to 3 .

[0052] According to some embodiments, the motor heat dissipation system further comprises a heat exchanger 6. The heat exchange pipe 4 further penetrates one end of the heat exchanger 6 and is attached to the inner wall of the heat exchanger 6 to conduct heat to the heat exchanger 6. The air conditioner is used to cool the heat exchanger 6.

[0053] Based on the above embodiment, in some embodiments, the air conditioner can cool the heat exchanger 6 by blowing cold air from the air conditioner fan 10 to the heat exchanger 6.

[0054] In other embodiments, the air conditioner can cool the heat exchanger 6 by penetrating the other end of the heat exchanger 6 with the refrigeration pipe 7 of the air conditioner, and attaching it to the inner wall of the heat exchanger 6 to cool the heat exchanger 6. The heat exchange pipe 4 penetrates the radiator 1, the driving motor 12 and the heat exchanger 6 respectively. When the driving motor 12 is working, the refrigeration pipe 7 of the air conditioner cools the heat exchanger 6. The heat exchanger 6 cools the heat exchange pipe 4. The heat exchange pipe 4 cools the radiator 1 and the driving motor 12 respectively. The overall cooling speed of the driving motor 12 is accelerated. In some embodiments, the driving motor 12 is sleeved on one end of the heat exchange pipe 4. The radiator 1 is sleeved on the middle part of the heat exchange pipe 4. The heat exchanger 6 is sleeved on the other end of the heat exchange pipe 4.

[0055] Please refer to Figure 1 .

[0056] According to some embodiments, the vehicle frame 3 is provided with a vehicle floor 8. The vehicle floor 8 is provided with an opening 9. The heat exchanger 6 is arranged on the upper side of the vehicle floor 8. The radiator 1, the fixed cross beam 2 and the driving motor 12 of the vehicle are arranged on the lower side of the vehicle floor 8. The heat exchange pipe 4 penetrates one end of the heat exchanger 6 through the opening 9.

[0057] Based on the above embodiment, the upper side of the vehicle floor 8 is the vehicle cabin, the radiator 1, the fixed crossbeam 2 and the driving motor 12 of the vehicle are all arranged on the lower side of the vehicle floor 8, the heat exchanger 6 is arranged on the upper side of the vehicle floor 8, one end of the heat exchange pipeline 4 is arranged through the driving motor 12, the middle part of the heat exchange pipeline 4 is arranged through the radiator 1, the other end of the heat exchange pipeline 4 extends to the upper end of the through port 9 from the lower end of the through port 9 and is arranged through one end of the heat exchanger 6.

[0058] Please refer to Figures 1 to 3 .

[0059] According to some embodiments, the air conditioner comprises a fan 10 arranged on the upper side of the vehicle floor 8 for cooling the vehicle cabin.

[0060] Based on the above embodiment, the fan 10 blows the cold air of the air conditioner into the upper end of the vehicle floor 8 which is the vehicle cabin. The connecting structure of the application can not only cool the vehicle cabin, but also cool the radiator 1 and the driving motor 12 through the heat exchanger 6, further accelerating the cooling speed of the motor and improving the practicability.

[0061] Please refer to Figure 4 .

[0062] According to some embodiments, the radiator 1 is provided with L-shaped connecting blocks 11 at both ends, one end of the L-shaped connecting block 11 is detachably connected with the side wall of the radiator 1, and the other end of the L-shaped connecting block 11 is detachably connected with the fixed crossbeam 2.

[0063] Based on the above embodiment, in some embodiments, the included angle between the two faces of the L-shaped connecting block 11 of the application is 90 degrees, screw holes are arranged on both faces of the L-shaped connecting block 11, screw holes are also arranged on both sides of the radiator 1, and screw holes are also arranged on the top of the fixed crossbeam 2, the screw holes on one face of the L-shaped connecting block 11 are aligned with the screw holes on one side of the radiator 1 in the axial direction and are fixed by screw threads or screw rods, and the screw holes on the other face of the L-shaped connecting block 11 are aligned with the screw holes on the top of the fixed crossbeam 2 in the axial direction and are fixed by screw threads or screw rods.

[0064] Further, two screw holes are uniformly arranged on one side of the radiator 1, two screw holes are also uniformly arranged on the other side of the radiator 1, four screw holes are arranged on the top of the fixed crossbeam 2 corresponding to the screw holes on both sides of the radiator 1, and four L-shaped connecting blocks 11 are arranged on both sides of the radiator 1 one by one, so that the screw holes on one face of the L-shaped connecting block 11 are aligned with the screw holes on one side of the radiator 1 in the axial direction and are fixed by screw threads or screw rods, and the screw holes on the other face of the L-shaped connecting block 11 are aligned with the screw holes on the top of the fixed crossbeam 2 in the axial direction and are fixed by screw threads or screw rods.

[0065] Please refer to Figure 5 .

[0066] According to some embodiments, the two ends of the fixed crossbeam 2 are connected to the bottom of the two ends of the vehicle frame 3 through screws. When the fixed crossbeam 2 needs to be replaced, the fixed crossbeam 2 can be disassembled and assembled through the screws, so as to facilitate replacement.

[0067] According to another embodiment, the application provides a control method of a motor heat dissipation system of a vehicle, which comprises: acquiring the power of the driving motor 12 in real time; when the power of the driving motor 12 is lower than or equal to a preset threshold, closing the heat exchanger 6 and opening the radiator 1 to cool the driving motor 12 through the radiator 1; when the power of the driving motor 12 is higher than the preset threshold, opening the radiator 1 to cool the driving motor 12 through the radiator 1, and opening the heat exchanger 6 to cool the radiator 1 through the heat exchanger 6.

[0068] Based on the above embodiment, when the driving motor 12 is working, the power of the driving motor 12 is acquired in real time, when the power of the driving motor 12 is lower than or equal to a preset threshold, the cooling heat exchange of the heat exchanger 6 by the refrigeration pipe 7 of the air conditioner is closed, the radiator 1 is opened, and the driving motor 12 is cooled by the radiator 1 alone, thereby saving power consumption.

[0069] When the driving motor 12 is working, when the power of the driving motor 12 is higher than the preset threshold, the cooling heat exchange of the heat exchanger 6 by the refrigeration pipe 7 of the air conditioner is opened, and the radiator 1 is opened to cool the driving motor 12 through the radiator 1, after the heat exchanger 6 is cooled by the refrigeration pipe 7, the heat exchanger 6 cools the radiator 1 and the driving motor 12, thereby further improving the cooling efficiency of the driving motor 12. The preset threshold can be set according to actual needs.

[0070] According to another embodiment, the application provides another control method of a motor heat dissipation system of a vehicle, which comprises: acquiring the temperature of the driving motor 12 in real time; when the temperature of the driving motor 12 is lower than or equal to a preset threshold, closing the heat exchanger 6 and opening the radiator 1 to cool the driving motor 12 through the radiator 1; when the temperature of the driving motor 12 is higher than the preset threshold, opening the radiator 1 to cool the driving motor 12 through the radiator 1, and opening the heat exchanger 6 to cool the radiator 1 through the heat exchanger 6.

[0071] Based on the above embodiment, when the driving motor 12 is working, the temperature of the driving motor 12 is acquired in real time, when the temperature of the driving motor 12 is lower than or equal to a preset threshold, the cooling heat exchange of the heat exchanger 6 by the refrigeration pipe 7 of the air conditioner is closed, the radiator 1 is opened, and the driving motor 12 is cooled by the radiator 1 alone, thereby saving power consumption.

[0072] When the temperature of the driving motor 12 is higher than a preset threshold value during the operation of the driving motor 12, the cooling heat exchange of the heat exchanger 6 by the refrigeration pipe 7 of the air conditioner is started, and the radiator 1 is started to cool the driving motor 12, and after the cooling of the heat exchanger 6 by the refrigeration pipe 7, the heat exchanger 6 cools the radiator 1 and the driving motor 12, which further improves the cooling efficiency of the driving motor 12. The preset threshold value can be set according to actual requirements.

[0073] In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0074] Although the present disclosure has been described with reference to several exemplary embodiments, it is understood that the terms used are illustrative and not restrictive, and the terms used are illustrative and not restrictive. Since the present disclosure can be embodied in various forms without departing from the spirit or essential characteristics of the invention, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but are to be broadly interpreted within the spirit and scope of the appended claims, and all changes and modifications that fall within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A motor cooling system for a vehicle, characterized in that: The motor heat dissipation system includes: A radiator and a fixed crossbeam, wherein the radiator is arranged on the fixed crossbeam, and the fixed crossbeam is arranged at the rear end of the vehicle frame; a heat exchange pipe, the heat exchange pipe respectively passing through the radiator and the drive motor of the vehicle and respectively contacting the inner wall of the radiator and the inner wall of the drive motor to transfer heat generated by the drive motor to the radiator; an air conditioner, the air conditioner being used to cool the heat exchange pipe; The motor heat dissipation system further includes a heat exchanger, the heat exchange pipe further passes through one end of the heat exchanger and is in contact with the inner wall of the heat exchanger to transfer heat to the heat exchanger, and the air conditioner is used to cool the heat exchanger; A vehicle floor is provided on the upper portion of the vehicle frame, the vehicle floor is provided with a through opening, the heat exchanger is provided on the upper side of the vehicle floor, the radiator, the fixed crossbeam and the vehicle drive motor are all provided on the lower side of the vehicle floor, and the heat exchange pipe passes through one end of the heat exchanger through the through opening; The refrigeration pipe of the air conditioner passes through the other end of the heat exchanger and fits against the inner wall of the heat exchanger so as to cool the heat exchanger.

2. The motor heat dissipation system according to claim 1, characterized in that: The motor heat dissipation system further includes a fluid pump, which is disposed in the heat exchange pipe to drive the cooling fluid to flow in the heat exchange pipe.

3. The motor heat dissipation system according to claim 1, characterized in that: The air conditioner includes a fan, which is arranged on the upper side of the vehicle floor to cool the interior of the vehicle.

4. The motor heat dissipation system according to claim 1, characterized in that: L-shaped connecting blocks are provided at both ends of the radiator, one end of the L-shaped connecting block is detachably connected to the side wall of the radiator, and the other end of the L-shaped connecting block is detachably connected to the fixed beam.

5. The motor heat dissipation system according to claim 1, characterized in that: The two ends of the fixed crossbeam are connected to the bottoms of the two ends of the frame through screw rods.

6. A control method for a motor cooling system of a vehicle, applied to the motor cooling system according to any one of claims 1 to 3, characterized in that: The method comprises: Get the driving motor power in real time; When the power of the driving motor is lower than or equal to a preset threshold, the heat exchanger is turned off and the radiator is turned on to cool the driving motor through the radiator; When the power of the driving motor is higher than a preset threshold, the radiator is turned on to cool the driving motor through the radiator, and the heat exchanger is turned on to cool the radiator through the heat exchanger.

7. A control method for a motor cooling system of a vehicle, applied to the motor cooling system according to any one of claims 1 to 3, characterized in that: The method comprises: Get the drive motor temperature in real time; When the temperature of the drive motor is lower than or equal to a preset threshold, the heat exchanger is turned off and the radiator is turned on to cool the drive motor through the radiator; When the temperature of the driving motor is higher than a preset threshold, the radiator is turned on to cool the driving motor through the radiator, and the heat exchanger is turned on to cool the radiator through the heat exchanger.

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