Thermal management system, control method, and vehicle

Abstract

The present application relates to a heat management system, a control method and a vehicle, comprising: an air inlet upper surrounding structure; an air inlet lower surrounding structure, which is arranged below the air inlet upper surrounding structure to form an air inlet between the air inlet upper surrounding structure and the air inlet lower surrounding structure; and an active air inlet grille connected between the air inlet upper surrounding structure and the air inlet lower surrounding structure, the active air inlet grille comprising rotatable blades; wherein the air inlet lower surrounding structure comprises an air inlet front edge located in front of the active air inlet grille; and in a cross section perpendicular to the width direction of the vehicle, the air inlet front edge comprises an arc-shaped section, which gradually rises from front to back, and the blades have an angle a with the forward direction of the vehicle, satisfying 90 DEG <= a <= 175 DEG. The heat management system of the present application, under the synergistic effect of the arc-shaped design of the air inlet front edge and the control of the angle of the blades with the forward direction of the vehicle, improves the air inlet efficiency, improves the heat exchange efficiency between the vehicle and the environment, and further improves the heat dissipation capacity of the vehicle in a high temperature environment.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to a thermal management system, a control method and a vehicle. Background Art

[0002] Due to the advantages of green environmental protection and zero carbon emissions of new energy vehicles, especially pure electric vehicles, their market share is gradually increasing. Compared with traditional energy vehicles, new energy vehicles have more complex functional requirements for thermal management systems. All heat transfer involved in the vehicle needs to be absorbed from the environment or released to the environment through the thermal management system of the new energy vehicle. Therefore, the thermal management system of new energy vehicles is a key factor in determining the cooling and heating experience and battery safety of new energy vehicles. In the existing technology, the amount of air entering the vehicle is adjusted by arranging active air intake grilles on the air intake of the vehicle. However, the active air intake grille will reduce the opening area of ​​the air intake, resulting in a reduction in the air intake efficiency of the air intake when high heat dissipation demand is required, thereby reducing the heat interaction efficiency between the new energy vehicle and the environment, and reducing the heat dissipation capacity in high temperature environments. Summary of the Invention

[0003] The purpose of the present invention is to provide a thermal management system, a control method and a vehicle to solve the problems in the prior art of low heat exchange efficiency between new energy vehicles and the environment and low heat dissipation capacity in high temperature environments.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] The present invention provides a thermal management system, which is applied to a vehicle and includes: an upper air vent structure; a lower air vent structure, which is spaced below the upper air vent structure to form an air inlet between the upper air vent structure and the lower air vent structure; an active air intake grille, which is connected between the upper air vent structure and the lower air vent structure, and the active air intake grille includes rotatable blades; wherein the lower air vent structure includes an air intake front located in front of the active air intake grille; in a cross section perpendicular to the width direction of the vehicle, the air intake front includes an arc segment, which gradually rises from front to rear, and the blade has an angle α with the forward direction of the vehicle, satisfying 90°≤α≤175°.

[0006] Optionally, in a cross section perpendicular to the width direction of the vehicle, the air intake front further includes a straight segment, a rear end of the straight segment is connected to the lower end of the active air intake grille, and a front end of the straight segment is connected to the rear end of the arc segment.

[0007] 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.

[0008] Optionally, the thermal management system further includes a cooling module, wherein the cooling module is connected between the air outlet upper surrounding structure and the air outlet lower surrounding structure, and the cooling module is arranged in communication with the air inlet.

[0009] Optionally, in a cross section perpendicular to the width direction of the vehicle, the cooling module and the forward direction of the vehicle have an angle γ that satisfies 90°≤γ≤165°.

[0010] Optionally, along the height direction of the vehicle, the height of the air inlet is A, satisfying 90mm≤A≤170mm; and / or, along the width direction of the vehicle, the length of the air inlet is B, satisfying 600mm≤B≤700mm.

[0011] Optionally, a surface of the blade facing the air inlet is a streamlined curved surface.

[0012] The present invention also provides a thermal management system control method for controlling the above-mentioned thermal management system, including: 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 and the forward direction of the vehicle satisfies 90°≤γ≤135°, then when the vehicle has a maximum heat dissipation demand, the angle α between the blade and the forward direction of the vehicle is controlled between 90° and 135°; if the angle γ between the cooling module and the forward direction of the vehicle satisfies 135°<γ≤165°, then when the vehicle has a maximum heat dissipation demand, the angle α between the blade and the forward direction of the vehicle and the angle γ between the cooling module and the forward direction of the vehicle remain consistent.

[0013] Optionally, the thermal management system control method also includes: when the ambient temperature exceeds 30°C and the vehicle runs uphill at a speed of more than 60 km / h along a slope k, if the angle γ between the cooling module and the forward direction of the vehicle satisfies 90°≤γ≤135°, then when the vehicle has a maximum heat dissipation demand, the angle α between the blade and the forward direction of the vehicle is controlled to be between 90° and γ+k; if the angle γ between the cooling module and the forward direction of the vehicle satisfies 135°<γ≤165°, then when the vehicle has a maximum heat dissipation demand, the angle α between the blade and the forward direction of the vehicle is max[135°+k,γ]; if the angle γ between the cooling module and the forward direction of the vehicle satisfies γ+k≥175°, then when the vehicle has a maximum heat dissipation demand, the angle α between the blade and the forward direction of the vehicle is 175°; when the ambient temperature exceeds 30°C and the vehicle is parked, when the vehicle has a maximum heat dissipation demand, the angle α between the blade and the forward direction of the vehicle is 175°.

[0014] The present invention also provides a vehicle comprising the above-mentioned thermal management system.

[0015] Beneficial effects of the present invention:

[0016] By utilizing the technical solution of the present invention, the arc design of the air intake front and the synergistic effect of controlling the angle between the blades and the forward direction of the vehicle are used to improve the air intake efficiency of the air inlet, improve the heat exchange efficiency between the vehicle and the environment, and thus improve the heat dissipation capacity of the vehicle in a high-temperature environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the structure of a thermal management system (a first embodiment of a cooling module) according to an embodiment of the present invention;

[0018] Figure 2 for Figure 1 A partially enlarged schematic diagram of the thermal management system shown;

[0019] Figure 3 for Figure 1 A dimensioned schematic diagram of the thermal management system shown;

[0020] Figure 4 This is a schematic structural diagram of an air inlet according to an embodiment of the present invention;

[0021] Figure 5 This is a schematic structural diagram of a second embodiment of a cooling module according to an embodiment of the present invention;

[0022] Figure 6 This is a schematic structural diagram of a third implementation of a cooling module according to an embodiment of the present invention.

[0023] Among them, the labels are:

[0024] 10. Upper air outlet structure; 11. Air hood; 12. Nacelle cover; 20. Lower air outlet structure; 21. Air intake front edge; 211. Arc segment; 212. Straight segment; 22. Nacelle lower guard plate; 23. Front edge rear baffle; 30. Air inlet; 40. Active air intake grille; 41. Blades; 50. Cooling module. DETAILED DESCRIPTION

[0025] The following describes the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art will readily appreciate the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the various details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are intended only to illustrate the present invention and are not intended to limit the scope of protection of the present invention.

[0026] It should be noted that the illustrations provided in the following embodiments are merely schematic illustrations of the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the number, shape, and size of components in actual implementation. In actual implementation, the type, quantity, and proportion of each component may be changed arbitrarily, and the component layout may also be more complex.

[0027] This embodiment proposes a thermal management system, which is applied to a vehicle, such as Figures 1 to 6 As shown, the vehicle comprises an upper air intake structure 10, a lower air intake structure 20, and an active air intake grille 40. The lower air intake structure 20 is spaced below the upper air intake structure 10, so that an air inlet 30 is formed between the upper air intake structure 10 and the lower air intake structure 20. The active air intake grille 40 is connected between the upper air intake structure 10 and the lower air intake structure 20, and includes rotatable blades 41. The lower air intake structure 20 includes an air intake front 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 21 includes an arcuate segment 211 that gradually rises from front to rear, and the blades 41 form an angle α with the vehicle's forward direction, satisfying 90°≤α≤175°.

[0028] By applying the thermal management system of this embodiment, the arc design of the air intake front 21 and the synergistic effect of controlling the angle between the blade 41 and the forward direction of the vehicle can improve the air intake efficiency of the air inlet 30, improve the heat exchange efficiency between the vehicle and the environment, and thus improve the heat dissipation capacity of the vehicle in a high temperature environment.

[0029] It is worth noting that, please refer to Figure 1 , the cross section perpendicular to the width of the vehicle, that is, the cross section of the vehicle in the length and height directions. Figure 2 , with the rotation towards the vertical upward direction of the vehicle's forward direction as a positive angle. Specifically, when the angle α between the blade 41 and the vehicle's forward direction is 90° (that is, the blade 41 is set vertically), the active air intake grille 40 is in a closed state, blocking air from entering from the air inlet 30; when the active air intake grille 40 needs to be opened, the blade 41 rotates counterclockwise to the required 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 the maximum open state; when the active air intake grille 40 needs to be closed, the blade 41 can be rotated clockwise.

[0030] It should be noted that, in this embodiment, the air intake front 21 includes an arc segment 211, and the arc segment 211 is gradually raised from front to back. In the process of air passing through the air intake front 21 and entering the air inlet 30, the air is regulated by the air intake front 21, thereby reducing the high-pressure air area in the horizontal direction, reducing the air resistance of the vehicle, and optimizing power consumption; and the air is directed upward and can cooperate with the inclined blades 41 to ensure the air intake efficiency and air intake volume of the air inlet 30.

[0031] like Figure 1 As shown, in the technical solution of this embodiment, on the cross section perpendicular to the width direction of the vehicle, the air intake front 21 also includes a straight line segment 212, the rear end of the straight line segment 212 is connected to the lower end of the active air intake grille 40, and the front end of the straight line segment 212 is connected to the rear end of the arc segment 211.

[0032] Further, such as Figure 3 As shown, 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, then bends downward at the end of the straight segment 212 away from the active air intake grille 40 to form the arc segment 211 with a radius of 7cm to 11cm and a central angle of 25° to 55°.

[0033] Optionally, the radius r of the arc segment 211 is 9 cm, the central angle β of the arc segment 211 is 30°, and the length L of the straight segment 212 is 6 cm.

[0034] like Figure 1 As shown, in the technical solution of this embodiment, the air outlet lower enclosure structure 20 also includes a cabin lower guard plate 22, which is located below the air intake front 21, the front end of the cabin lower guard plate 22 is connected to the front end of the air intake front 21, and the rear end of the cabin lower guard plate 22 is extended backward; the air outlet lower enclosure structure 20 also includes a front rear block 23, which is located behind the air intake front 21, and the front rear block 23 connects the rear end of the air intake front 21 and the upper surface of the cabin lower guard plate 22.

[0035] like Figures 1 to 3 As shown, in the technical solution of this embodiment, the thermal management system also includes a cooling module 50. The cooling module 50 is connected between the air outlet upper enclosure structure 10 and the air outlet lower enclosure structure 20, and the cooling module 50 is connected to the air inlet 30. The cooling module 50 is used to cool the motor, battery pack, passenger compartment, etc., and the air entering through the air inlet 30 is used to dissipate heat for the cooling module 50.

[0036] like Figure 2As shown, in the technical solution of this embodiment, in a cross section perpendicular to the vehicle width, the cooling module 50 forms an angle γ with the vehicle's forward direction, satisfying 90°≤γ≤165°. By tilting the cooling module 50, and in conjunction with the curved design of the intake front 21 and the tilt angle of the blades 41, the heat dissipation effect of the cooling module 50 is improved.

[0037] It is worth noting that in this embodiment, the air is directed upward through the air intake front 21, so that after entering through the air inlet 30, the air flows from the lower end of the cooling module 50 to the upper end of the cooling module 50, and flows out through the upper end of the cooling module 50, thereby enabling the cooling module 50 to obtain a greater heat exchange capacity and ensuring more efficient utilization of the cooling module 50.

[0038] Three implementations of the cooling module 50 are introduced below.

[0039] like Figure 1 As shown, 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 radiator 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 to dissipate heat for components such as the motor, electronic control, battery, and onboard water cooling controller, while the other is used to cool the passenger compartment's air conditioning system.

[0040] Furthermore, there are two ways to cool the air-conditioning system in the passenger compartment: the first is that the refrigerant of the air-conditioning system directly exchanges heat with the air through a radiator for cooling. At this time, the passenger compartment cooling radiator is called an air condenser, which is a special 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 heated by the refrigerant exchanges heat with the air through a radiator. This radiator is called a passenger compartment cooling radiator.

[0041] like Figure 5 As shown, in a second embodiment of the cooling module 50, the cooling module 50 includes a single radiator. That is, the motor, electronic control, battery, onboard water cooling controller, and passenger compartment share a single radiator. The coolant first passes through the electric drive system's water-to-oil plate heat exchanger and then through a water-to-refrigerant plate heat exchanger. The heated coolant then exchanges heat with the air through the cooling module 50.

[0042] like Figure 6As shown, in a third embodiment of the cooling module 50, the cooling module 50 includes two parallel radiators. Both radiators are used to cool the motor, electronic control, battery, onboard water-cooling controller, and passenger compartment. In other words, the coolant flows through the two radiators separately and then is combined. Of course, more radiators can be provided, such as three or four, depending on the specific heat dissipation requirements.

[0043] like Figure 1 As shown, in the technical solution of this embodiment, the air inlet upper enclosure structure 10 includes an air hood 11 and a cabin cover 12 that are connected and arranged, and the air hood 11 wraps the cooling module 50.

[0044] like Figure 4 As shown, in the technical solution of this embodiment, the height of the air inlet 30 along the height direction of the vehicle is A, satisfying 90mm≤A≤170mm; along the width direction of the vehicle, the length of the air inlet 30 is B, satisfying 600mm≤B≤700mm.

[0045] Optionally, the height A of the air inlet 30 is 105 mm, and the length B of the air inlet 30 is 650 mm.

[0046] In the technical solution of this embodiment, the side of the blade 41 facing the air inlet 30 (i.e., the windward side) is a streamlined curved surface, which is more conducive to air intake and can further improve air intake efficiency.

[0047] Furthermore, a side of the blade 41 facing away from the air inlet 30 (ie, the leeward side) is provided with reinforcing ribs to improve the overall strength of the blade 41 .

[0048] 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.

[0049] The present invention also provides a thermal management system control method for controlling the above thermal management system, comprising:

[0050] 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 forward direction of the vehicle satisfies 90°≤γ≤135°, then when the vehicle has the maximum heat dissipation demand, the angle α between the blade 41 and the forward direction of the vehicle is controlled between 90° and 135°; if the angle γ between the cooling module 50 and the forward direction of the vehicle satisfies 135°<γ≤165°, then when the vehicle has the maximum heat dissipation demand, the angle α between the blade 41 and the forward direction of the vehicle and the angle γ between the cooling module 50 and the forward direction of the vehicle remain consistent.

[0051] In the technical solution of this embodiment, the thermal management system control method also includes: when the ambient temperature exceeds 30°C and the vehicle is running uphill at a speed of more than 60 km / h along a slope k, if the angle γ between the cooling module 50 and the forward direction of the vehicle satisfies 90°≤γ≤135°, then when the vehicle has a maximum heat dissipation demand, the angle α between the blade 41 and the forward direction of the vehicle is controlled to be between 90° and γ+k; if the angle γ between the cooling module 50 and the forward direction of the vehicle satisfies 135°<γ≤165°, then when the vehicle has a maximum heat dissipation demand, the angle α between the blade 41 and the forward direction of the vehicle is max[135°+k,γ]; if the angle γ between the cooling module 50 and the forward direction of the vehicle satisfies γ+k≥175°, then when the vehicle has a maximum heat dissipation demand, the angle α between the blade 41 and the forward direction of the vehicle is 175°.

[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 parked, and the vehicle has a maximum heat dissipation demand, the angle α between the blade 41 and the forward direction of the vehicle is 175°.

[0053] In the technical solution of this embodiment, 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 coordinated and controlled in combination with the ambient temperature and vehicle speed to improve the heat dissipation effect of the cooling module 50, thereby improving the heat dissipation efficiency of the entire vehicle.

[0054] It is worth noting that the ambient temperature refers to the temperature of the environment in which the vehicle is located, that is, the air intake temperature detected by the wind temperature sensor. The wind temperature sensor is arranged inside the active air intake grille 40 to measure the temperature of the air entering through the air inlet 30.

[0055] It is worth noting that the maximum heat dissipation demand of a vehicle refers to the situation where all the heat dissipation demands such as motor cooling, battery cooling, and passenger compartment cooling are superimposed.

[0056] It should be noted that the entire control process of the thermal management system is basically as follows: first determine the vehicle speed, then determine the ambient temperature, and then confirm the maximum angle of the active air intake grille 40.

[0057] The present invention also provides a vehicle comprising the above-mentioned thermal management system.

[0058] In the technical solution of this embodiment, the vehicle is a pure electric vehicle.

[0059] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention.

Claims

1. A thermal management system control method for controlling a thermal management system applied to a vehicle, characterized in that: The thermal management system includes: Tuyere upper enclosure structure (10); An air vent lower enclosure structure (20) is spaced below the air vent upper enclosure structure (10) to form an air inlet (30) between the air vent upper enclosure structure (10) and the air vent lower enclosure structure (20); An active air intake grille (40) connected between the air outlet upper enclosure structure (10) and the air outlet lower enclosure structure (20), the active air intake grille (40) including rotatable blades (41); a cooling module (50), the cooling module (50) being connected between the air outlet upper surrounding structure (10) and the air outlet lower surrounding structure (20), the cooling module (50) being in communication with the air inlet (30); The air outlet lower enclosure 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 segment (211), the arc segment (211) gradually rises from front to rear, and the blade (41) has an angle α with the forward direction of the vehicle, which satisfies 90°≤α≤175°; 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 forward direction of the vehicle satisfies 90°≤γ≤135°, then when the vehicle has a maximum heat dissipation demand, the angle α between the blade (41) and the forward direction of the vehicle is controlled to be between 90° and 135°; if the angle γ between the cooling module (50) and the forward direction of the vehicle satisfies 135°<γ≤165°, then when the vehicle has a maximum heat dissipation demand, the angle α between the blade (41) and the forward direction of the vehicle and the angle γ between the cooling module (50) and the forward direction of the vehicle remain consistent.

2. The thermal management system control method according to claim 1, characterized in that: In a cross section perpendicular to the vehicle width direction, the air intake front (21) further comprises a straight segment (212), a rear end of the straight segment (212) being connected to the lower end of the active air intake grille (40), and a front end of the straight segment (212) being connected to the rear end of the arc segment (211).

3. The thermal management system control method 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, which satisfies 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 control method according to any one of claims 1 to 3, characterized in that: On a cross section perpendicular to the width direction of the vehicle, the cooling module (50) has an included angle γ with the forward direction of the vehicle, satisfying 90°≤γ≤165°.

5. The thermal management system control method 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 90 mm ≤ A ≤ 170 mm; and / or, Along the width direction of the vehicle, the length of the air inlet (30) is B, satisfying 600mm≤B≤700mm.

6. The thermal management system control method 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.

7. The thermal management system control method according to any one of claims 1 to 3, characterized in that: 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 (50) and the forward direction of the vehicle satisfies 90°≤γ≤135°, then when the vehicle has a maximum heat dissipation requirement, the angle α between the blade (41) and the forward direction of the vehicle is controlled to be between 90° and γ+k; if the angle γ between the cooling module (50) and the forward direction of the vehicle satisfies 135°<γ≤165°, then when the vehicle has a maximum heat dissipation requirement, the angle α between the blade (41) and the forward direction of the vehicle is equal to max[135°+k,γ]; if the angle γ between the cooling module (50) and the forward direction of the vehicle satisfies γ+k≥175°, then when the vehicle has a maximum heat dissipation requirement, the angle α between the blade (41) and the forward direction of the vehicle is equal to 175°; When the ambient temperature exceeds 30°C and the vehicle is parked, the angle α between the blade (41) and the forward direction of the vehicle is 175° when the vehicle has a maximum heat dissipation demand.

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