Thermal management system, control method and vehicle

Abstract

The present application relates to a thermal management system, a control method and a vehicle. The thermal management system comprises: an air inlet upper surround structure; an air inlet lower surround structure, which is spaced below the air inlet upper surround structure, such that an air inlet is formed between the air inlet upper surround structure and the air inlet lower surround structure; and an active grille shutter, which is connected between the air inlet upper surround structure and the air inlet lower surround structure, the active grille shutter comprising rotatable vanes. The air inlet lower surround structure comprises an air intake leading edge located in front of the active grille shutter; in a cross section perpendicular to the width direction of a vehicle, the air intake leading edge comprises a curved section, the curved section gradually rises from front to rear, and each vane forms an included angle α with the traveling direction of the vehicle, the included angle α satisfying 90°≤α≤175°. By means of a synergistic effect of the curved design of the air intake leading edge and the control of the included angle between each vane and the traveling direction of the vehicle, the thermal management system of the present application can improve the air intake efficiency of the air inlet, and improve the efficiency of heat exchange between the vehicle and an environment, thereby improving the heat dissipation capability of vehicles in high-temperature environments.

Description

Thermal management system, control method and vehicle

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202510035481.8, filed on January 9, 2025, entitled "Thermal Management System, Control Method and Vehicle", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of new energy vehicle technology, specifically to a thermal management system, control method, and vehicle. Background Technology

[0004] Due to the advantages of being green, environmentally friendly, and having zero carbon emissions, the market share of new energy vehicles, especially pure electric vehicles, is gradually increasing. Compared with traditional energy vehicles, new energy vehicles have more complex functional requirements for their thermal management systems. All heat transfer involved in the vehicle needs to be absorbed from or released into the environment through the new energy vehicle's thermal management system. Therefore, the thermal management system is a key factor determining the cooling and heating experience and battery safety of new energy vehicles. In existing technologies, active air intake grilles are used to regulate the airflow entering the vehicle. However, active air intake grilles reduce the opening area of ​​the air intake, resulting in reduced air intake efficiency under high heat dissipation demands. This reduces the efficiency of heat exchange between the new energy vehicle and the environment, thus decreasing its heat dissipation capacity in high-temperature environments. Summary of the Invention

[0005] The purpose of this application is to provide a thermal management system, control method, and vehicle to solve the problems of low thermal interaction efficiency between new energy vehicles and the environment and low heat dissipation capacity in high-temperature environments in the prior art.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0007] This application provides a thermal management system for a vehicle, comprising: an upper vent structure; a lower vent structure, spaced below the upper vent structure to form an air inlet between the upper and lower vent structures; and an active air intake grille connected between the upper and lower vent structures, the active air intake grille including rotatable blades; wherein the lower vent structure includes an air intake leading edge located in front of the active air intake grille; in a cross-section perpendicular to the vehicle width direction, the air intake leading edge includes an arcuate segment that gradually rises from front to rear, and the blades have an angle α with the vehicle's forward direction, satisfying 90°≤α≤175°.

[0008] Optionally, in a cross section perpendicular to the vehicle width direction, the air intake front edge further includes a straight segment, the rear end of which is connected to the lower end of the active air intake grille, and the front end of which is connected to the rear end of the arc-shaped segment.

[0009] Optionally, the radius of the arc segment is r, satisfying 7cm≤r≤11cm; and / or, the central angle of the arc segment is β, satisfying 25°≤β≤55°; and / or, the length of the straight segment is L, satisfying 5cm≤L≤9cm.

[0010] Optionally, the thermal management system further includes a cooling module, which is connected between the upper vent structure and the lower vent structure, and is connected to the air inlet.

[0011] Optionally, in a cross section perpendicular to the vehicle width direction, the cooling module has an angle γ with the vehicle's forward direction, satisfying 90°≤γ≤165°.

[0012] Optionally, the height of the air inlet is A along the height direction of the vehicle, satisfying 90mm≤A≤170mm; and / or, the length of the air inlet is B along the width direction of the vehicle, satisfying 600mm≤B≤700mm.

[0013] Optionally, the side of the blade facing the air inlet is a streamlined curved surface.

[0014] This application also provides a thermal management system control method for controlling the aforementioned thermal management system, comprising: when the ambient temperature exceeds 30°C and the vehicle is running horizontally at a speed exceeding 60 km / h, if the angle γ between the cooling module and the vehicle's direction of travel satisfies 90°≤γ≤135°, then when the vehicle has maximum heat dissipation demand, the angle α between the blades and the vehicle's direction of travel is controlled between 90° and 135°; if the angle γ between the cooling module and the vehicle's direction of travel satisfies 135°<γ≤165°, then when the vehicle has maximum heat dissipation demand, the angle α between the blades and the vehicle's direction of travel and the angle γ between the cooling module and the vehicle's direction of travel are consistent.

[0015] Optionally, the thermal management system control method further includes: when the ambient temperature exceeds 30°C and the vehicle is running uphill at a speed exceeding 60 km / h along a slope k, if the angle γ between the cooling module and the vehicle's direction of travel satisfies 90°≤γ≤135°, then when the vehicle has maximum heat dissipation demand, the angle α between the blades and the vehicle's direction of travel is controlled between 90° and γ+k; if the angle γ between the cooling module and the vehicle's direction of travel satisfies 135°<γ≤165°, then when the vehicle has maximum heat dissipation demand, the angle α between the blades and the vehicle's direction of travel is α=max[135°+k,γ]; if the angle γ between the cooling module and the vehicle's direction of travel satisfies γ+k≥175°, then when the vehicle has maximum heat dissipation demand, the angle α between the blades and the vehicle's direction of travel is α=175°; when the ambient temperature exceeds 30°C and the vehicle is parked, when the vehicle has maximum heat dissipation demand, the angle α between the blades and the vehicle's direction of travel is α=175°.

[0016] This application also provides a vehicle including the aforementioned thermal management system.

[0017] The beneficial effects of this application are:

[0018] By utilizing the technical solution of this application, the air intake efficiency of the air inlet is improved through the synergistic effect of the arc design at the air intake front edge and the control of the angle between the blades and the vehicle's forward direction, thereby improving the heat exchange efficiency between the vehicle and the environment and enhancing the vehicle's heat dissipation capacity in high-temperature environments. Attached Figure Description

[0019] Figure 1 is a schematic diagram of the structure of a thermal management system (first embodiment of the cooling module) according to an embodiment of this application;

[0020] Figure 2 is a partially enlarged schematic diagram of the thermal management system shown in Figure 1;

[0021] Figure 3 is a schematic diagram showing the dimensions of the thermal management system shown in Figure 1;

[0022] Figure 4 is a structural schematic diagram of the air inlet according to an embodiment of this application;

[0023] Figure 5 is a structural schematic diagram of a second embodiment of the cooling module of this application;

[0024] Figure 6 is a structural schematic diagram of a third embodiment of the cooling module of this application.

[0025] The following are the designations: 10. Upper vent structure; 11. Vent cover; 12. Nacelle cover; 20. Lower vent structure; 21. Inlet front edge; 211. Arc section; 212. Straight section; 22. Nacelle lower guard plate; 23. Front edge rear baffle; 30. Air inlet; 40. Active air intake grille; 41. Blade; 50. Cooling module. Detailed Implementation

[0026] The embodiments of this application will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be understood that the preferred embodiments are only for illustrating this application and are not intended to limit the scope of protection of this application.

[0027] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. Therefore, the drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0028] This embodiment proposes a thermal management system for a vehicle, as shown in Figures 1 to 6, including: an upper air vent structure 10, a lower air vent structure 20, and an active air intake grille 40. The lower air vent structure 20 is spaced below the upper air vent structure 10, forming an air intake 30 between the upper air vent structure 10 and the lower air vent structure 20. The active air intake grille 40 connects the upper air vent structure 10 and the lower air vent structure 20, and includes rotatable blades 41. The lower air vent structure 20 includes an air intake front edge 21 located in front of the active air intake grille 40; in a cross-section perpendicular to the vehicle width direction, the air intake front edge 21 includes an arc-shaped segment 211, which gradually rises from front to rear. The blades 41 have an angle α with the vehicle's forward direction, satisfying 90°≤α≤175°.

[0029] The thermal management system of this embodiment improves the air intake efficiency of the air inlet 30 and the heat exchange efficiency between the vehicle and the environment by combining the arc design of the air intake front edge 21 and the control of the angle between the blade 41 and the vehicle's forward direction. This, in turn, improves the vehicle's heat dissipation capacity in high-temperature environments.

[0030] It is worth noting that, referring to Figure 1, the cross-section perpendicular to the vehicle's width direction is the cross-section of the vehicle in both its length and height directions. Referring to Figure 2, with the vehicle's forward direction rotating vertically upwards as the positive angle, specifically, when the angle α between the blade 41 and the vehicle's forward direction is 90° (i.e., the blade 41 is vertically positioned), the active air intake grille 40 is in a closed state, blocking air from entering through the air intake 30; when the active air intake grille 40 needs to be opened, the blade 41 rotates counterclockwise to the desired angle; when the angle α between the blade 41 and the vehicle's forward direction is 175°, the active air intake grille 40 is in its fully open state; when the active air intake grille 40 needs to be closed, the blade 41 rotates clockwise.

[0031] It should be noted that in this embodiment, the air intake front edge 21 includes an arc-shaped section 211, and the arc-shaped section 211 gradually rises from front to back. As the air enters the air intake 30 through the air intake front edge 21, the air is regulated by the air intake front edge 21, thereby reducing the high-pressure area of ​​the air in the horizontal direction, reducing the air resistance of the vehicle, and thus optimizing power consumption. In addition, the air is guided upward, which can cooperate with the inclined blades 41 to ensure the air intake efficiency and air volume of the air intake 30.

[0032] As shown in Figure 1, in the technical solution of this embodiment, on the cross section perpendicular to the vehicle width direction, the air intake front edge 21 further includes a straight segment 212. The rear end of the straight segment 212 is connected to the lower end of the active air intake grille 40, and the front end of the straight segment 212 is connected to the rear end of the arc segment 211.

[0033] Optionally, as shown in Figure 3, in the technical solution of this embodiment, the radius of the arc segment 211 is r, satisfying 7cm≤r≤11cm; the central angle of the arc segment 211 is β, satisfying 25°≤β≤55°; and the length of the straight segment 212 is L, satisfying 5cm≤L≤9cm. That is, the straight segment 212 extends horizontally forward from the lower end of the active air intake grille 40 for a length of 5cm to 9cm, and then bends downward at the end of the straight segment 212 away from the active air intake grille 40 to form an arc segment 211 with a radius of 7cm to 11cm and a central angle of 25° to 55°.

[0034] Optionally, the radius r of the arc segment 211 is 9cm, the central angle β of the arc segment 211 is 30°, and the length L of the straight segment 212 is 6cm.

[0035] As shown in Figure 1, in the technical solution of this embodiment, the lower vent structure 20 also includes a lower nacelle guard plate 22, which is located below the air intake front edge 21. The front end of the lower vent structure 22 is connected to the front end of the air intake front edge 21, and the rear end of the lower vent structure 22 extends rearward. The lower vent structure 20 also includes a front edge rear baffle 23, which is located behind the air intake front edge 21. The front edge rear baffle 23 connects the rear end of the air intake front edge 21 with the upper surface of the lower vent structure 22.

[0036] As shown in Figures 1 to 3, in the technical solution of this embodiment, the thermal management system further includes a cooling module 50. The cooling module 50 is connected between the upper vent structure 10 and the lower vent structure 20, and is connected to the air inlet 30. The cooling module 50 is used to cool and reduce the temperature of the motor, battery pack, passenger compartment, etc., and the air entering through the air inlet 30 is used to dissipate heat from the cooling module 50.

[0037] As shown in Figure 2, in the technical solution of this embodiment, the cooling module 50 has an angle γ with the vehicle's forward direction on a cross section perpendicular to the vehicle's width direction, satisfying 90°≤γ≤165°. By tilting the cooling module 50 and coordinating it with the arc design of the air intake front edge 21 and the tilt angle of the blades 41, the heat dissipation effect of the cooling module 50 is improved.

[0038] It is worth noting that in this embodiment, the air is guided upward through the air inlet front edge 21, so that the air enters through the air inlet 30 and flows from the lower end of the cooling module 50 to the upper end of the cooling module 50, and then flows out through the upper end of the cooling module 50, thereby enabling the cooling module 50 to obtain greater heat exchange and ensuring more efficient utilization of the cooling module 50.

[0039] The following describes three implementation methods of the cooling module 50.

[0040] As shown in Figure 1, in a first embodiment of the cooling module 50, the cooling module 50 includes a front radiator and a rear radiator, which are arranged in parallel. The front radiator is the one closest to the air inlet 30, and the rear radiator is located on the side of the front radiator away from the air inlet 30. One of the front and rear radiators is used for cooling components such as the motor, electronic control unit, battery, and on-board water-cooled controller, while the other is used for cooling the air conditioning system of the passenger compartment.

[0041] Optionally, there are two ways to cool the air conditioning system for the passenger compartment: the first is that the refrigerant of the air conditioning system directly exchanges heat with the air through a radiator, in which case the passenger compartment cooling radiator is called an air condenser, which is a special type of radiator; the second is that the refrigerant of the air conditioning system exchanges heat with the coolant through a plate heat exchanger, and then the coolant, which is heated by the refrigerant, exchanges heat with the air through a radiator, which is called a passenger compartment cooling radiator.

[0042] As shown in Figure 5, in the second embodiment of the cooling module 50, the cooling module 50 includes a single radiator, that is, the motor, electronic control, battery, on-board water-cooled controller, and passenger compartment share a single radiator. The coolant first passes through the water-oil plate heat exchanger of the electric drive system, and then through the water-coolant plate heat exchanger. The heated coolant exchanges heat with the air through the cooling module 50.

[0043] As shown in Figure 6, in the third embodiment of the cooling module 50, the cooling module 50 includes two parallel radiators. The two radiators are used simultaneously to cool the motor, electronic control unit, battery, on-board water-cooled controller, and passenger compartment. That is, the coolant flows through the two radiators separately and then converges. Of course, more radiators can be provided, such as three or four, depending on the specific heat dissipation requirements.

[0044] As shown in Figure 1, in the technical solution of this embodiment, the upper vent structure 10 includes a wind shield 11 and a nacelle cover 12 connected together, and the wind shield 11 encloses the cooling module 50.

[0045] As shown in Figure 4, in the technical solution of this embodiment, the height of the air inlet 30 along the height direction of the vehicle is A, which satisfies 90mm≤A≤170mm; the length of the air inlet 30 along the width direction of the vehicle is B, which satisfies 600mm≤B≤700mm.

[0046] Optionally, the height A of the air inlet 30 is 105mm, and the length B of the air inlet 30 is 650mm.

[0047] In this embodiment, the side of the blade 41 facing the air inlet 30 (i.e., the windward side) is a streamlined curved surface. This is more conducive to air intake and can further improve air intake efficiency.

[0048] Optionally, the side of the blade 41 facing away from the air inlet 30 (i.e., the leeward side) is provided with reinforcing ribs to improve the overall strength of the blade 41.

[0049] In the technical solution of this embodiment, several layers of blades 41 are arranged along the height direction of the air inlet 30. Each layer of blades 41 rotates around a horizontal axis and the rotation of the blades 41 is driven by a motor.

[0050] This application also provides a thermal management system control method for controlling the aforementioned thermal management system, comprising:

[0051] When the ambient temperature exceeds 30°C and the vehicle is running horizontally at a speed exceeding 60 km / h, if the angle γ between the cooling module 50 and the vehicle's direction of travel satisfies 90°≤γ≤135°, then when the vehicle has maximum heat dissipation requirements, the angle α between the blade 41 and the vehicle's direction of travel is controlled between 90° and 135°; if the angle γ between the cooling module 50 and the vehicle's direction of travel satisfies 135°<γ≤165°, then when the vehicle has maximum heat dissipation requirements, the angle α between the blade 41 and the vehicle's direction of travel and the angle γ between the cooling module 50 and the vehicle's direction of travel are consistent.

[0052] In the technical solution of this embodiment, the thermal management system control method further includes: when the ambient temperature exceeds 30°C and the vehicle is running uphill at a speed exceeding 60km / h along a slope k, if the angle γ between the cooling module 50 and the vehicle's forward direction satisfies 90°≤γ≤135°, then when the vehicle has maximum heat dissipation demand, the angle α between the blade 41 and the vehicle's forward direction is controlled between 90° and γ+k; if the angle γ between the cooling module 50 and the vehicle's forward direction satisfies 135°<γ≤165°, then when the vehicle has maximum heat dissipation demand, the angle α between the blade 41 and the vehicle's forward direction is max[135°+k, γ]; if the angle γ between the cooling module 50 and the vehicle's forward direction satisfies γ+k≥175°, then when the vehicle has maximum heat dissipation demand, the angle α between the blade 41 and the vehicle's forward direction is 175°.

[0053] In the technical solution of this embodiment, the thermal management system control method further includes: when the ambient temperature exceeds 30°C and the vehicle is parked, when the vehicle has the maximum heat dissipation demand, the angle α between the blade 41 and the vehicle's forward direction is 175°.

[0054] In the technical solution of this embodiment, by combining ambient temperature and vehicle speed, the angle γ between the cooling module 50 and the vehicle's forward direction and the angle α between the blade 41 and the vehicle's forward direction are controlled in a coordinated manner to improve the heat dissipation effect of the cooling module 50, thereby improving the overall vehicle heat dissipation efficiency.

[0055] It is worth noting that ambient temperature refers to the temperature of the environment in which the vehicle is located, which is the intake air temperature detected by the air temperature sensor. The air temperature sensor is located inside the active air intake grille 40 to measure the temperature of the air entering through the air intake 30.

[0056] It is worth noting that the maximum heat dissipation requirement of a vehicle refers to the combined heat dissipation requirements of motor cooling, battery cooling, and passenger compartment cooling.

[0057] It should be noted that the basic control process of the thermal management system is as follows: first, determine the vehicle speed, then determine the ambient temperature, and then confirm the maximum angle of the active air intake grille at 40 degrees.

[0058] This application also provides a vehicle including the aforementioned thermal management system.

[0059] In the technical solution of this embodiment, the vehicle is a pure electric vehicle.

[0060] The above embodiments are merely preferred embodiments provided to fully illustrate this application, and the scope of protection of this application is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on this application are all within the scope of protection of this application.

Claims

1. A thermal management system applied to a vehicle, characterized in that, include: Upper circumference structure of the air vent (10); The lower vent structure (20) is spaced below the upper vent structure (10) so that an air inlet (30) is formed between the upper vent structure (10) and the lower vent structure (20); An active air intake grille (40) is connected between the upper air intake structure (10) and the lower air intake structure (20), and the active air intake grille (40) includes rotatable blades (41); The lower vent structure (20) includes an air intake front edge (21) located in front of the active air intake grille (40); On a cross section perpendicular to the width of the vehicle, the air intake front edge (21) includes an arc segment (211) that gradually rises from front to back, and the blade (41) has an angle α with the forward direction of the vehicle, satisfying 90°≤α≤175°.

2. The thermal management system according to claim 1, characterized in that, In a cross section perpendicular to the vehicle width direction, the air intake front edge (21) also includes a straight segment (212), the rear end of which is connected to the lower end of the active air intake grille (40), and the front end of which is connected to the rear end of the arc segment (211).

3. The thermal management system according to claim 2, characterized in that, The radius of the arc segment (211) is r, satisfying 7cm ≤ r ≤ 11cm; and / or, The central angle of the arc segment (211) is β, satisfying 25°≤β≤55°; and / or, The length of the straight line segment (212) is L, which satisfies 5cm≤L≤9cm.

4. The thermal management system according to any one of claims 1 to 3, characterized in that, The thermal management system further includes a cooling module (50), which is connected between the upper vent structure (10) and the lower vent structure (20), and is connected to the air inlet (30).

5. The thermal management system according to claim 4, characterized in that, On a cross section perpendicular to the width of the vehicle, the cooling module (50) has an angle γ with the forward direction of the vehicle, satisfying 90°≤γ≤165°.

6. The thermal management system according to any one of claims 1 to 3, characterized in that, Along the height direction of the vehicle, the height of the air inlet (30) is A, satisfying 90mm≤A≤170mm; and / or, Along the width direction of the vehicle, the length of the air inlet (30) is B, which satisfies 600mm≤B≤700mm.

7. The thermal management system according to any one of claims 1 to 3, characterized in that, The side of the blade (41) facing the air inlet (30) is a streamlined curved surface.

8. A control method for a thermal management system, used to control the thermal management system according to any one of claims 1 to 7, characterized in that, include: When the ambient temperature exceeds 30°C and the vehicle is running horizontally at a speed exceeding 60km / h, if the angle γ between the cooling module (50) and the vehicle's direction of travel satisfies 90°≤γ≤135°, then when the vehicle has the maximum heat dissipation requirement, the angle α between the blade (41) and the vehicle's direction of travel is controlled between 90° and 135°; if the angle γ between the cooling module (50) and the vehicle's direction of travel satisfies 135°<γ≤165°, then when the vehicle has the maximum heat dissipation requirement, the angle α between the blade (41) and the vehicle's direction of travel and the angle γ between the cooling module (50) and the vehicle's direction of travel are consistent.

9. The thermal management system control method according to claim 8, characterized in that, The thermal management system control method further includes: When the ambient temperature exceeds 30℃ and the vehicle is running uphill at a speed exceeding 60km / h along a slope k, if the angle γ between the cooling module (50) and the vehicle's direction of travel satisfies 90°≤γ≤135°, then when the vehicle has the maximum heat dissipation requirement, the angle α between the blade (41) and the vehicle's direction of travel is controlled between 90° and γ+k; if the angle γ between the cooling module (50) and the vehicle's direction of travel satisfies 135°<γ≤165°, then when the vehicle has the maximum heat dissipation requirement, the angle α between the blade (41) and the vehicle's direction of travel is max[135°+k, γ]; if the angle γ between the cooling module (50) and the vehicle's direction of travel satisfies γ+k≥175°, then when the vehicle has the maximum heat dissipation requirement, the angle α between the blade (41) and the vehicle's direction of travel is 175°. When the ambient temperature exceeds 30°C and the vehicle is parked, the angle α between the blade (41) and the vehicle's forward direction is 175° when the vehicle is under maximum heat dissipation demand.

10. A vehicle, characterized in that, The thermal management system includes any one of claims 1 to 7.

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