A thermal management system and vehicle

Abstract

The application belongs to the technical field of vehicle thermal management, and particularly relates to a thermal management system and a vehicle. The thermal management system comprises a first cooling device; the first cooling device comprises a first radiator, a first cooling pipeline provided with a first cooling component, and a second cooling pipeline provided with a second cooling component; the first radiator comprises a first radiator body and a second radiator body; an outlet of the first radiator body is communicated with an inlet of the second radiator body; the thermal management system comprises a first cooling circuit and a second cooling circuit; in the first cooling circuit, cooling liquid flows through the first radiator body, the second radiator body, the first cooling pipeline, and then flows to the second cooling pipeline; in the second cooling circuit, cooling liquid flows through the first radiator body, and then flows to the second cooling pipeline. In the application, the structure of the thermal management system is simple, the components are less, and the manufacturing cost is low.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of vehicle thermal management, in particular to a thermal management system and a vehicle. BACKGROUND

[0002] With the continuous development of vehicle technology, the oil consumption regulation is becoming more and more strict, and the sales of hybrid vehicles are rising. For some hybrid vehicles, due to the limitation of installation space, the thermal management system needs to meet the cooling requirements of the motor controller, the motor, the intercooler, the battery and the exhaust gas recirculation device in a compact space, so a compact and efficient thermal management system needs to be developed.

[0003] In the prior art, in order to meet the cooling requirements of each cooling module of the thermal management system, a complex pipeline system needs to be arranged, thereby increasing the manufacturing cost of the thermal management system and increasing the occupied space. SUMMARY

[0004] The present application solves the technical problems of complex structure and large occupied space of the thermal management system, and provides a thermal management system and a vehicle.

[0005] In view of the above problems, the present application provides a thermal management system, which comprises a first cooling device; the first cooling device comprises a first radiator, a first cooling pipeline provided with a first cooling component, and a second cooling pipeline provided with a second cooling component; the first radiator comprises a first radiator body and a second radiator body;

[0006] The outlet of the first radiator body is communicated with the inlet of the second radiator body, and the thermal management system comprises a first cooling loop and a second cooling loop; in the first cooling loop, the cooling liquid flows through the first radiator body, the second radiator body, the first cooling pipeline, and then flows to the second cooling pipeline; in the second cooling loop, the cooling liquid flows through the first radiator body and then flows to the second cooling pipeline.

[0007] Optionally, the thermal management system further comprises a condenser which is arranged opposite to the first radiator body and the second radiator body.

[0008] Optionally, the thermal management system further comprises a throttle valve, the outlet of the first radiator body is communicated with the throttling port of the throttle valve, the first cooling pipeline is communicated with the liquid inlet of the throttle valve, and the second cooling pipeline is communicated with the liquid outlet of the throttle valve; in the first cooling loop, the cooling liquid flows through the first radiator body, the second radiator body, the inlet of the throttle valve and the outlet of the throttle valve, and then flows to the second cooling pipeline; in the second cooling loop, the cooling liquid flows through the first radiator body, the throttling port of the throttle valve and the outlet of the throttle valve, and then flows to the second cooling pipeline.

[0009] Optionally, the first radiator further comprises a water outlet chamber provided with a water outlet space, and the outlet of the first radiator body communicates with the inlet of the second radiator body and the throttling inlet of the throttling valve through the water outlet space.

[0010] The first radiator further comprises a water inlet chamber provided with a first liquid space and a second liquid space, and the second cooling pipeline communicates with the inlet of the first radiator body through the first liquid space, and the outlet of the second radiator body communicates with the first cooling pipeline through the second liquid space.

[0011] Optionally, the first radiator body is arranged above the second radiator body, and the water inlet chamber and the water outlet chamber are arranged on opposite sides of the first radiator.

[0012] The first radiator further comprises a partition plate arranged on the side of the water inlet chamber away from the water outlet chamber and used for partitioning the first liquid space and the second liquid space.

[0013] Optionally, the partition plate is bent on the water inlet chamber to form a partition groove with an opening, and the opening of the partition groove is arranged on the side of the water inlet chamber away from the water outlet chamber.

[0014] Optionally, the partition plate comprises a first inclined plate, a connecting plate and a second inclined plate connected in sequence, and the first inclined plate and the second inclined plate are arranged at a first preset included angle.

[0015] Optionally, the thermal management system further comprises a second cooling device and a cooling fan, the second cooling device comprises a second radiator and a third cooling pipeline provided with an engine, the second radiator is arranged on the side of the first radiator away from the condenser, the cooling fan is arranged on the side of the second radiator away from the first radiator, and the inlet of the second radiator communicates with the outlet of the second radiator through the third cooling pipeline.

[0016] Optionally, the second cooling device further comprises a bypass pipe, a thermostatic valve and a main water pump, the outlet of the second radiator communicates with the inlet of the main water pump, the outlet of the main water pump communicates with the first through port of the thermostatic valve through the third cooling pipeline, the second through port of the thermostatic valve communicates with the inlet of the second radiator, and the third through port of the thermostatic valve communicates with the inlet of the main water pump through the bypass pipe.

[0017] Optionally, the area of the throttling inlet is smaller than the area of the liquid inlet.

[0018] Another embodiment of the present application further provides a vehicle comprising the above thermal management system.

[0019] In the present application, the heat management system comprises a first cooling circuit and a second cooling circuit, in the first cooling circuit, cooling liquid flows through the first heat dissipation body, the second heat dissipation body, the first cooling pipeline and then flows to the second cooling pipeline; in the second cooling circuit, cooling liquid flows through the first heat dissipation body and then flows to the second cooling pipeline. The cooling liquid in the first cooling pipeline is subjected to twice cooling treatment in the first heat dissipation body and the second heat dissipation body, so that the cooling liquid in the first cooling pipeline for cooling the first cooling component has a lower temperature, and the cooling effect on the first cooling component is obvious; and the cooling liquid in the second cooling pipeline comprises cooling liquid subjected to once cooling treatment in the first heat dissipation body and cooling liquid after cooling treatment of the first cooling component (cooling liquid after twice cooling treatment of the condenser and completion of cooling treatment of the first cooling component), so that the cooling liquid in the second cooling pipeline for cooling the second cooling component has a higher temperature. In the present application, according to different temperature requirements of the first cooling component and the second cooling component, the heat management system can realize reasonable distribution of cooling liquid in the first cooling device, so as to meet different cooling temperature requirements of different cooling components and improve the cooling efficiency of the heat management system; and the heat management system has simple structure, fewer components and low manufacturing cost. BRIEF DESCRIPTION OF DRAWINGS

[0020] The present application is further illustrated below in combination with the drawings and examples.

[0021] Figure 1 A schematic diagram of a heat management system provided by an embodiment of the present application is shown in the figure.

[0022] Figure 2 A schematic diagram of a first cooling device of a heat management system provided by another embodiment of the present application is shown in the figure.

[0023] Figure 3 A sectional view of a water inlet chamber of a heat management system provided by an embodiment of the present application is shown in the figure.

[0024] Figure 4 A sectional view of a throttle valve of a heat management system provided by an embodiment of the present application is shown in the figure.

[0025] Figure 5 A sectional view of a throttle valve of a heat management system provided by another embodiment of the present application is shown in the figure.

[0026] The reference signs in the specification are as follows:

[0027] 1. Condenser; 2. First cooling device; 21. First radiator; 211. First radiator body; 212. Second radiator body; 213. Water outlet chamber; 2131. Water outlet space; 214. Water inlet chamber; 2141. First liquid space; 2142. Second liquid space; 215. Divider plate; 2151. Divider groove; 2152. First inclined plate; 2153. Connecting plate; 2154. Second inclined plate; 22. Throttling valve; 221. Throttling inlet; 222. Liquid inlet; 223. Liquid outlet; 23. First cooling pipe; 231. First cooling assembly; 24. Second cooling pipe; 241. Second cooling assembly; 242. Electric pump; 3. Second cooling device; 31. Second radiator; 32. Third cooling pipe; 321. Engine; 33. Bypass pipe; 34. Thermostatic valve; 35. Main water pump; 4. Cooling fan. Detailed Implementation

[0028] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention.

[0029] It should be understood that the terms "upper", "lower", "left", "right", "front", "rear", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of the present invention.

[0030] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a thermal management system, including a first cooling device 2; the first cooling device 2 includes a first radiator 21, a throttle valve 22, a first cooling pipe 23 provided with a first cooling component 231, and a second cooling pipe 24 provided with a second cooling component 241; the first radiator 21 includes a first heat dissipation body 211 and a second heat dissipation body 212; it is understood that the second cooling component 241 includes, but is not limited to, a motor cooler, an intercooler, an exhaust gas recirculation system, etc., and the first cooling pipe 23 is also provided with an electric pump 242; while the first cooling component 231 includes, but is not limited to, a motor controller, a DC step-down converter, etc., and the operating temperature of the first cooling component 231 is lower than the operating temperature of the second cooling component 241. Further, the condenser 1 can cool the coolant in both the first heat dissipation body 211 and the second heat dissipation body 212.

[0031] The outlet of the first heat dissipation body 211 is communicated with the inlet of the second heat dissipation body 212, and the heat management system comprises a first cooling loop and a second cooling loop. In the first cooling loop, the cooling liquid flows through the first heat dissipation body 211, the second heat dissipation body 212 and the first cooling pipeline 23 and then flows to the second cooling pipeline 24. In the second cooling loop, the cooling liquid flows through the first heat dissipation body 211 and then flows to the second cooling pipeline 24. It can be understood that one end of the second cooling pipeline 24 is communicated with the inlet of the first heat dissipation body 211, the other end of the second cooling pipeline 24 is communicated with the outlet of the first heat dissipation body 211 and the first cooling pipeline 23, and the first cooling pipeline 23 is communicated with the outlet of the second heat dissipation body 212 away from the second cooling pipeline 24.

[0032] The heat management system comprises a first cooling loop and a second cooling loop. In the first cooling loop, the cooling liquid flows through the first heat dissipation body 211, the second heat dissipation body 212 and the first cooling pipeline 23 and then flows to the second cooling pipeline 24. In the second cooling loop, the cooling liquid flows through the first heat dissipation body 211 and then flows to the second cooling pipeline 24.

[0033] Specifically, the cooling liquid in the first heat dissipation body 211 is cooled for the first time in the first heat dissipation body 211, part of the cooling liquid enters the second heat dissipation body 212 and is cooled for the second time, and then flows into the second cooling pipeline 24 after the first cooling component 231 is cooled to a first preset temperature in the first cooling pipeline 23. Another part of the cooling liquid directly flows into the second cooling pipeline 24, and after the second cooling component 241 is cooled to a second preset temperature, the cooling liquid flows back to the first heat dissipation body 211. The second preset temperature is less than the first preset temperature.

[0034] In the present application, the heat management system comprises a first cooling circuit and a second cooling circuit. In the first cooling circuit, the cooling liquid flows through the first heat dissipation body 211, the second heat dissipation body 212, the first cooling pipeline 23 and then flows to the second cooling pipeline 24. In the second cooling circuit, the cooling liquid flows through the first heat dissipation body 211 and then flows to the second cooling pipeline 212. The cooling liquid in the first cooling pipeline 23 is subjected to twice cooling treatment in the first heat dissipation body 211 and the second heat dissipation body 212, so that the cooling liquid in the first cooling pipeline 23 for cooling the first cooling component 231 has a lower temperature, and the cooling effect on the first cooling component 231 is obvious. The cooling liquid in the second cooling pipeline 24 comprises the cooling liquid subjected to once cooling treatment in the first heat dissipation body 211 and the cooling liquid after the cooling treatment of the first cooling component 231 (the cooling liquid after twice cooling treatment of the condenser 1 and the completion of the cooling treatment of the first cooling component 231). Therefore, the cooling liquid in the second cooling pipeline 24 for cooling the second cooling component 241 has a higher temperature. In the present application, the cooling liquid in the first cooling device 2 can be reasonably distributed by the heat management system according to the different temperature requirements of the first cooling component 231 and the second cooling component 241, so that the different cooling temperature requirements of different cooling components are met, and the cooling efficiency of the heat management system is improved. Moreover, the heat management system has a simple structure, fewer components and low manufacturing cost.

[0035] In an embodiment, as shown in Figure 1 and 2 The heat management system further comprises a condenser 1 arranged opposite to the first heat dissipation body 211 and the second heat dissipation body 212. It can be understood that the first heat dissipation body 211 is installed above the second heat dissipation body 212, and the condenser 1 has a cooling effect on the cooling liquid in the first heat dissipation body 211 and the cooling liquid in the second heat dissipation body 212.

[0036] In an embodiment, as shown in Figure 1 and 2As shown, the heat management system further comprises a throttle valve 22, an outlet of the first radiator 211 is communicated with a throttle inlet 221 of the throttle valve 22, the first cooling pipeline 23 (i.e. one end of the first cooling pipeline 23 away from the second radiator 212) is communicated with a liquid inlet 222 of the throttle valve 22, the second cooling pipeline 24 (i.e. one end of the second cooling pipeline 24 away from the first radiator 211) is communicated with a liquid outlet 223 of the throttle valve 22; in the first cooling loop, the coolant flows through the first radiator 211, the second radiator 212, the liquid inlet 222 of the throttle valve 22 and the liquid outlet 223 of the throttle valve 22 and then flows to the second cooling pipeline 23; in the second cooling loop, the coolant flows through the first radiator 211, the throttle inlet 221 of the throttle valve 22 and the liquid outlet 223 of the throttle valve 22 and then flows to the second cooling pipeline 24. It can be understood that the throttle valve 22 has the throttle inlet 221, the liquid inlet 222 and the liquid outlet 223 communicated with each other, the area of the throttle inlet 221 is smaller than the area of the liquid inlet 222 (i.e. the opening space of the throttle inlet 221 is smaller than the opening space of the liquid inlet 222); further, the area of the throttle inlet 221 is smaller than the area of the liquid outlet 223 (i.e. the opening space of the throttle inlet 221 is smaller than the opening space of the liquid outlet 222). Specifically, the first radiator 211 flows into the throttle inlet 221 of the throttle valve 22, due to the smaller opening space of the throttle inlet 221, a part of the coolant is pressed back to the second radiator 212, and another part of the coolant directly enters the second cooling pipeline 24 through the liquid outlet 223 of the throttle valve 22, so that the coolant in the first radiator 211 is branched without setting a power device, thereby reducing the manufacturing cost of the heat management system.

[0037] In an embodiment, as shown in Figure 2 As shown, the first radiator 21 further comprises a water outlet chamber 213 provided with a water outlet space 2131, the outlet of the first radiator 211 is communicated with the inlet of the second radiator 212 and the throttle inlet 221 of the throttle valve 22 through the water outlet space 2131. It can be understood that the first radiator 211 is provided with a plurality of first radiator pipes, the second radiator 212 is provided with a plurality of second radiator pipes, the outlets of the plurality of first radiator pipes are all communicated with the water outlet space 2131, and the inlets of the plurality of second radiator pipes are all communicated with the water outlet space 2131, so that the water outlet chamber 213 can play a role of buffering the coolant.

[0038] In an embodiment, as shown in Figure 2As shown, the first radiator 21 further comprises a water inlet chamber 214 provided with a first liquid space 2141 and a second liquid space 2142, the second cooling pipeline 24 (i.e. the end of the second cooling pipeline 24 away from the throttle valve 22) is connected to the inlet of the first radiator body 211 through the first liquid space 2141, and the outlet of the second radiator body 212 is connected to the first cooling pipeline 23 through the second liquid space 2142. It can be understood that the first liquid space 2141 and the second liquid space 2142 are arranged on the water inlet chamber 214 in a spaced manner, the inlets of the plurality of first radiator pipes are connected to the first liquid space 2141, and the outlets of the plurality of second radiator pipes are connected to the second liquid space 2142, so that the water inlet chamber 214 can play a role of buffering the cooling liquid.

[0039] In an embodiment, as shown in Figure 2 and Figure 3 The first radiator body 211 is arranged above the second radiator body 212, the water inlet chamber 214 and the water outlet chamber 213 are arranged on opposite sides of the first radiator 21, respectively. It can be understood that the first radiator 21 is of an upper and lower side structure, the upper layer is the first radiator body 211, the lower layer is the second radiator body 212, and the condenser 1 has a cooling effect on the cooling liquid in the first radiator body 211 and the second radiator body 212, and the water inlet chamber 214 and the water outlet chamber 213 are arranged on the left and right sides of the first radiator 21, respectively.

[0040] The first radiator 21 further comprises a partition plate 215 arranged on the side of the water inlet chamber 214 away from the water outlet chamber 213 and used for separating the first liquid space 2141 and the second liquid space 2142. It can be understood that the water inlet chamber 214 is provided with the partition plate 215, and the partition plate 215 separates the internal space of the water inlet chamber 214 into the first liquid space 2141 and the second liquid space 2142. In this example, the first radiator 21 has a simple structure and low manufacturing cost.

[0041] In an embodiment, as shown in Figure 3As shown, the partition plate 215 is bent on the water inlet chamber 214 to form a partition groove 2151 with an opening; the opening of the partition groove 2151 is arranged on the side of the water inlet chamber 214 away from the water outlet chamber 213. It can be understood that the partition groove 2151 is a structure formed by recessing the outer wall of the water inlet chamber 214, and since the temperature of the cooling liquid in the second liquid space 2142 is lower than the temperature of the cooling liquid in the first liquid space 2141, the cooling liquid in the water inlet chamber 214 has a certain thermal stress due to the temperature difference; and the partition plate 215 is designed as a partition groove 2151 structure, and the opposite two side walls of the partition groove 2151 can resist thermal stress, thereby reducing the influence of thermal stress on the first radiator 21 and prolonging the service life of the first radiator 21.

[0042] In an embodiment, as shown in Figure 3 As shown, the partition plate 215 includes a first inclined plate 2152, a connecting plate 2153 and a second inclined plate 2154 connected in sequence, and the first inclined plate 2152 and the second inclined plate 2154 are arranged at a first preset angle. As preferred, the first preset angle is greater than or equal to 30 degrees and less than or equal to 60 degrees; that is, the first preset angle is in the range of 30 degrees to 60 degrees (for example, 30 degrees, 40 degrees, 50 degrees and 60 degrees, etc.). It can be understood that the first inclined plate 2152 and the second inclined plate 2154 are symmetrically arranged on opposite sides of the connecting plate 2153, and the connecting plate 2153 abuts the inner side wall of the water inlet chamber 214 towards the first radiator body 211, so that the partition plate 215 can separate the inner wall space of the water inlet chamber 214 into a first liquid chamber and a second liquid chamber (the first liquid chamber and the second liquid chamber are not communicated). In this embodiment, the first inclined plate 2152 and the second inclined plate 2154 can resist the thermal stress of the cooling liquid in the water inlet chamber 214, thereby prolonging the service life of the first radiator 21.

[0043] In an embodiment, as shown in Figure 1As shown, the heat management system further comprises a second cooling device 3 and a cooling fan 4, the second cooling device 3 comprises a second radiator 31 and a third cooling pipeline 32 provided with an engine 321, the second radiator 31 is arranged at a side of the first radiator 21 away from the condenser 1, the cooling fan 4 is arranged at a side of the second radiator 31 away from the first radiator 21; an inlet of the second radiator 31 is communicated with an outlet of the second radiator 31 through the third cooling pipeline 32. Understandably, the cold wind blown by the cooling fan 4 can play a role in cooling the coolant in the second radiator 31. In the embodiment, the condenser 1, the first radiator 21, the second radiator 31 and the cooling fan 4 are arranged in sequence and are spaced, and no component for blocking heat transmission is arranged between the condenser 1 and the first radiator 21, so that the cooling efficiency of the heat management system is improved.

[0044] In an embodiment, as shown in Figure 1 As shown, the second cooling device 3 further comprises a bypass pipe 33, a thermostat 34 and a main water pump 35, an outlet of the second radiator 31 is communicated with an inlet of the main water pump 35, an outlet of the main water pump 35 is communicated with a first port of the thermostat 34 through the third cooling pipeline 32, a second port of the thermostat 34 is communicated with an inlet of the second radiator 31, and a third port of the thermostat 34 is communicated with the inlet of the main water pump 35 through the bypass pipe 33. Understandably, when the temperature of the coolant in the third cooling pipeline 32 is low, the first port and the third port of the thermostat 34 are opened, and the second port is closed, and the coolant circulates in the third cooling pipeline 32 and the bypass pipe 33 under the action of the main water pump 35, so that the temperature of the coolant in the third pipeline rises, thereby facilitating the start of the engine 321; when the temperature of the coolant in the third cooling pipeline 32 rises to a preset temperature threshold, the first port and the second port of the thermostat 34 are opened, and the third port is closed, so that the coolant circulates in the second radiator and the third cooling pipeline 32, and the second radiator can play a role in cooling the coolant under the action of the cooling fan 4, and then the coolant in the third cooling pipeline 32 can play a role in cooling the engine 321.

[0045] Another embodiment of the present application further provides a vehicle comprising the heat management system.

[0046] The above only describes the preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A thermal management system, characterized by, The first cooling device comprises a first radiator, a first cooling pipeline provided with a first cooling component, and a second cooling pipeline provided with a second cooling component; the first radiator comprises a first radiator body and a second radiator body; The outlet of the first radiator body is communicated with the inlet of the second radiator body, and the heat management system comprises a first cooling loop and a second cooling loop; in the first cooling loop, the cooling liquid flows through the first radiator body, the second radiator body, the first cooling pipeline, and then flows to the second cooling pipeline; in the second cooling loop, the cooling liquid flows through the first radiator body, and then flows to the second cooling pipeline; The heat management system further comprises a throttle valve, the outlet of the first radiator body is communicated with the throttling inlet of the throttle valve, the first cooling pipeline is communicated with the liquid inlet of the throttle valve, and the second cooling pipeline is communicated with the liquid outlet of the throttle valve; in the first cooling loop, the cooling liquid flows through the first radiator body, the second radiator body, the liquid inlet of the throttle valve, and the liquid outlet of the throttle valve, and then flows to the second cooling pipeline; in the second cooling loop, the cooling liquid flows through the first radiator body, the throttling inlet of the throttle valve, and the liquid outlet of the throttle valve, and then flows to the second cooling pipeline; The area of the throttling inlet is smaller than the area of the liquid inlet; The first radiator further comprises a water outlet chamber provided with a water outlet space, and the outlet of the first radiator body is communicated with the inlet of the second radiator body and the throttling inlet of the throttle valve through the water outlet space.

2. The thermal management system of claim 1, wherein, The heat management system further comprises a condenser which is arranged opposite to the first radiator body and the second radiator body.

3. The thermal management system of claim 1, wherein, The first radiator further comprises a water inlet chamber provided with a first liquid space and a second liquid space, and the second cooling pipeline is communicated with the inlet of the first radiator body through the first liquid space, and the outlet of the second radiator body is communicated with the first cooling pipeline through the second liquid space.

4. The thermal management system of claim 3, wherein, The first radiator body is arranged above the second radiator body; the water inlet chamber and the water outlet chamber are arranged on opposite sides of the first radiator respectively; The first radiator further comprises a partition plate arranged on the side of the water inlet chamber away from the water outlet chamber and used for separating the first liquid space and the second liquid space.

5. The thermal management system of claim 4, wherein, The partition plate is bent on the water inlet chamber to form a partition groove with an opening; the opening of the partition groove is arranged on the side of the water inlet chamber away from the water outlet chamber.

6. The thermal management system of claim 5, wherein, The partition plate comprises a first inclined plate, a connecting plate, and a second inclined plate which are connected in sequence; the first inclined plate and the second inclined plate are arranged at a first preset included angle.

7. The thermal management system of claim 2, wherein, The heat management system further comprises a second cooling device and a cooling fan; the second cooling device comprises a second radiator and a third cooling pipeline provided with an engine; the second radiator is arranged on the side of the first radiator away from the condenser, and the cooling fan is arranged on the side of the second radiator away from the first radiator; the inlet of the second radiator is communicated with the outlet of the second radiator through the third cooling pipeline.

8. The thermal management system of claim 7, wherein, The second cooling device further comprises a bypass pipe, a thermostat valve and a main water pump, an outlet of the second radiator is communicated with an inlet of the main water pump, an outlet of the main water pump is communicated with a first through hole of the thermostat valve through the third cooling pipe, a second through hole of the thermostat valve is communicated with an inlet of the second radiator, and a third through hole of the thermostat valve is communicated with the inlet of the main water pump through the bypass pipe.

9. A vehicle characterized by comprising: A thermal management system comprising any one of claims 1 to 8.

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