Thermal management system, control method and vehicle

Abstract

The invention relates to a thermal management system, a control method and a vehicle. The tuyere lower enclosure structure is arranged below the tuyere upper enclosure structure at intervals, so that an air inlet is formed between the tuyere upper enclosure structure and the tuyere lower enclosure structure; the active air-inlet grille is connected between the tuyere upper surrounding structure and the tuyere lower surrounding structure, and the active air-inlet grille comprises rotatable blades; the tuyere lower surrounding structure comprises an air inlet front edge located in front of the active air inlet grille. On the section perpendicular to the width direction of the vehicle, the air inlet front edge comprises an arc-shaped section, the arc-shaped section gradually rises from front to back, and an included angle alpha is formed between the blades and the advancing direction of the vehicle and is larger than or equal to 90 degrees and smaller than or equal to 175 degrees. According to the heat management system, under the synergistic effect of arc-shaped design of the air inlet front edge and control over the included angle between the blades and the advancing direction of the vehicle, the air inlet efficiency of the air inlet is improved, the heat interaction efficiency between the vehicle and the environment is improved, and then the heat dissipation capacity of the vehicle in the high-temperature environment is improved.

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] Since new energy vehicles, especially pure electric vehicles, have the advantages of green environmental protection and zero carbon emissions, their market sales share has gradually increased. 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 new energy vehicles. 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 prior art, the amount of air entering the vehicle is adjusted by arranging an active air intake grille on the air inlet of the vehicle. However, the active air intake grille will reduce the opening area of ​​the air inlet, resulting in the active air intake grille reducing the air intake efficiency of the air inlet when the heat dissipation demand is high, thereby reducing the heat interaction efficiency between the new energy vehicle and the environment, and reducing the heat dissipation capacity in a high temperature environment. 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 a high temperature environment.

[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, comprising: an upper air outlet enclosure structure; a lower air outlet enclosure structure, which is spaced below the upper air outlet enclosure structure to form an air inlet between the upper air outlet enclosure structure and the lower air outlet enclosure structure; an active air intake grille, which is connected between the upper air outlet enclosure structure and the lower air outlet enclosure structure, and the active air intake grille comprises rotatable blades; wherein the lower air outlet enclosure structure comprises an air intake front located in front of the active air intake grille; on a cross section perpendicular to the width direction of the vehicle, the air intake front comprises an arc segment, the arc segment 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 line 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 connected to the air inlet.

[0009] Optionally, in a cross section perpendicular to the width direction of the vehicle, the cooling module has an angle γ with the forward direction of the vehicle, satisfying 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 exceeding 60km / 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 can 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 This is a schematic structural diagram of a thermal management system (a first implementation 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 a thermal management system shown;

[0020] Figure 4 A schematic diagram of the structure of an air inlet according to an embodiment of the present invention;

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

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

[0023] Among them, the labels are:

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

[0025] The following will describe the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0026] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being 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 complicated.

[0027] This embodiment proposes a thermal management system, which is applied to a vehicle, such as Figures 1 to 6 As shown, it includes: an air outlet upper enclosure structure 10, an air outlet lower enclosure structure 20 and an active air intake grille 40. The air outlet lower enclosure structure 20 is arranged below the air outlet upper enclosure structure 10 at intervals, so that an air inlet 30 is formed between the air outlet upper enclosure structure 10 and the air outlet lower enclosure structure 20. The active air intake grille 40 is connected between the air outlet upper enclosure structure 10 and the air outlet lower enclosure structure 20, and the active air intake grille 40 includes a rotatable blade 41. Among them, the air outlet lower enclosure structure 20 includes an air intake front 21 located in front of the active air intake grille 40; on a cross section perpendicular to the width direction of the vehicle, the air intake front 21 includes an arc segment 211, and the arc segment 211 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°.

[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 mentioning that please refer to Figure 1 , the cross section perpendicular to the width of the vehicle, is the cross section of the vehicle in the length and height directions. Figure 2 , with the vehicle's forward direction being rotated toward the vertically upward 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 vertically arranged), 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 is rotated clockwise.

[0030] It should be noted that, in the present 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; moreover, 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, which satisfies 7cm≤r≤11cm; the central angle of the arc segment 211 is β, which satisfies 25°≤β≤55°; the length of the straight segment 212 is L, which satisfies 5cm≤L≤9cm. That is, the straight segment 212 extends horizontally forward from the lower end of the active air intake grille 40 by 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°.

[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 the present embodiment, the lower air outlet 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 lower air outlet enclosure structure 20 also includes a front rear stop 23, which is located behind the air intake front 21, and the front rear stop 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 further includes a cooling module 50, which 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, the battery pack, the passenger compartment, etc., and the air entering from 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 width direction of the vehicle, the cooling module 50 has an angle γ with the forward direction of the vehicle, satisfying 90°≤γ≤165°. By tilting the cooling module 50 and coordinating with the arc design of the air intake front 21 and the tilt angle of the blade 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 larger heat exchange amount and ensuring more efficient use of the cooling module 50.

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

[0039] like Figure 1 As shown, in the first embodiment of the cooling module 50, the cooling module 50 includes a front radiator and a rear radiator, and the front radiator and the rear radiator are arranged in parallel. The front radiator is the radiator close to the air inlet 30, and the rear radiator is arranged on the side of the front radiator away from the air inlet 30. One of the front radiator and the rear radiator is used for heat dissipation of components such as motors, electronic controls, batteries, and vehicle-mounted water cooling controllers, and the other of the front radiator and the rear radiator is used for cooling the air conditioning system of the passenger compartment.

[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. In this case, 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 the radiator. This radiator is called a passenger compartment cooling radiator.

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

[0042] like Figure 6As shown, in the third embodiment of the cooling module 50, the cooling module 50 includes two radiators arranged in parallel, and the two radiators are used for cooling the motor, the electronic control, the battery, the vehicle water cooling controller and the passenger compartment at the same time, that is, the coolant flows through the two radiators respectively and then is collected. Of course, the radiator can also be set to more, such as three, four, etc., which can be specifically arranged according to the heat dissipation requirements.

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

[0044] like Figure 4 As shown, in the technical solution of this embodiment, along the height direction of the vehicle, the height of the air inlet 30 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 (ie, the windward side) is a streamlined curved surface, which is more conducive to air intake and can further improve the 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, a plurality of layers of blades 41 are arranged along the height direction of the air inlet 30 , and 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 runs 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 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.

[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 runs 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 demand, the angle α between the blade 41 and the forward direction of the vehicle is controlled 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 also 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 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 vehicle's maximum heat dissipation demand refers to the situation where all heat dissipation demands such as motor cooling, battery cooling, and passenger compartment cooling are combined.

[0056] It should be noted that the entire control process of the thermal management system is basically: 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 change made by a person skilled in the art based on the present invention is within the protection scope of the present invention.

Claims

1. A thermal management system, applied to a vehicle, characterized in that: include: Tuyere upper enclosure structure (10); An air outlet lower enclosure structure (20) is spaced below the air outlet upper enclosure structure (10) so that an air inlet (30) is formed between the air outlet upper enclosure structure (10) and the air outlet 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), wherein the active air intake grille (40) comprises rotatable blades (41); The air outlet lower enclosure 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 width direction of the vehicle, the air intake front (21) includes an arc segment (211), the arc segment (211) 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 width direction of the vehicle, the air intake front (21) further comprises a straight segment (212), a rear end of the straight segment (212) being connected to a lower end of the active air intake grille (40), and a front end of the straight segment (212) being connected to a 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, 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 according to any one of claims 1 to 3, characterized in that: The thermal management system further comprises a cooling module (50), wherein the cooling module (50) is connected between the air outlet upper surrounding structure (10) and the air outlet lower surrounding structure (20), and the cooling module (50) is arranged in communication with the air inlet (30).

5. The thermal management system according to claim 4, characterized in that: In a cross section perpendicular to the width direction 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 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.

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

8. A thermal management system control method, 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 60 km / h, if the angle γ between the cooling module (50) and the vehicle's forward direction satisfies 90°≤γ≤135°, then when the vehicle has a maximum heat dissipation demand, the angle α between the blade (41) and the vehicle's forward direction is controlled to be between 90° and 135°; if the angle γ between the cooling module (50) and the vehicle's forward direction satisfies 135°<γ≤165°, then when the vehicle has a maximum heat dissipation demand, the angle α between the blade (41) and the vehicle's forward direction and the angle γ between the cooling module (50) and the vehicle's forward direction remain 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°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 vehicle's forward direction satisfies 90°≤γ≤135°, then when the vehicle has a maximum heat dissipation requirement, the angle α between the blade (41) and the vehicle's forward direction is controlled to be 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 a maximum heat dissipation requirement, the angle α between the blade (41) and the vehicle's forward direction is equal to 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 a maximum heat dissipation requirement, the angle α between the blade (41) and the vehicle's forward direction is equal to 175°; When the ambient temperature exceeds 30° C. and the vehicle is parked, and the vehicle has a maximum heat dissipation requirement, the included angle α between the blade (41) and the forward direction of the vehicle is 175°.

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

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