Thermal management system, thermal management method and vehicle

Abstract

The present invention provides a thermal management system, a thermal management method, and a vehicle. The thermal management system includes an air conditioning management system (100), a motor management system (200), a battery management system (300), a passenger compartment management system (400), and a charger management system (500), and the air conditioning management system (100), the motor management system (200), the battery management system (300), the passenger compartment management system (400), and the charger management system (500) are connected to each other via refrigerant lines.

Description

[Technical Field]

[0001] The present invention relates to the field of vehicle thermal management technology, and more particularly to a thermal management system, a thermal management method, and a vehicle. [Background technology]

[0002] With the increasing popularity of new energy vehicles, thermal management of new energy vehicles has become an unavoidable topic. The thermal management systems for the battery, motor, passenger compartment air conditioner, and charger are closely related to the normal operation and driving range of the vehicle. Summary of the Invention

[0003] The present invention provides a thermal management system, a thermal management method, and a vehicle that integrates a charger.

[0004] The present invention discloses a thermal management system applied to a vehicle, the thermal management system including an air conditioning management system, a motor management system, a battery management system, a passenger compartment management system, and a charger management system, wherein the air conditioning management system, the motor management system, the battery management system, the passenger compartment management system, and the charger management system are connected via refrigerant lines.

[0005] Furthermore, the air conditioning management system includes a main line and a refrigerant heat dissipation line, the outflow end of the main line is connected to the inflow end of the refrigerant heat dissipation line, a compressor is provided in the main line, and an air conditioning condenser and a first solenoid valve are provided in the refrigerant heat dissipation line.

[0006] The charger management system further includes a charger cooling line and a charger provided in the charger cooling line, an outflow end and an inflow end of the charger cooling line being connected to an inflow end of the main line and an outflow end of the refrigerant heat dissipation line, respectively, and a fourth electronic expansion valve being provided at the inflow end of the charger cooling line.

[0007] The motor management system further includes a motor refrigerant path and a motor, the motor being a direct-refrigerant-cooled motor, in which refrigerant flows into one end of the motor, passes through the motor, and flows out from the other end of the motor, the outflow end and the inflow end of the motor refrigerant path are connected to the inflow end of the main line and the outflow end of the refrigerant heat dissipation line, respectively, and a first electronic expansion valve is provided at the inflow end of the motor refrigerant path.

[0008] Furthermore, the motor management system further includes a controller, the controller being arranged between the motor and the first electronic expansion valve, the motor including a rotor and a stator, the rotor and the stator being in direct contact with the refrigerant, and the motor being capable of stall heat dissipation.

[0009] Further, the battery management system includes a battery pack, a battery cooling line, and a battery heat supply line, the outflow end and the inflow end of the battery cooling line are respectively connected to the inflow end of the main line and the outflow end of the refrigerant heat dissipation line, the inflow end and the outflow end of the battery heat supply line are respectively connected to the outflow end of the main line and the inflow end of the motor refrigerant path, a second electronic expansion valve is provided at the inflow end of the battery cooling line, and a second solenoid valve is provided at the inflow end of the battery heat supply line.

[0010] Further, the passenger compartment management system includes a passenger compartment heating line and a passenger compartment cooling line, the inlet end and outlet end of the passenger compartment heating line are respectively connected to the outlet end of the main line and the inlet end of the motor refrigerant path, the outlet end and inlet end of the passenger compartment cooling line are respectively connected to the inlet end of the main line and the outlet end of the refrigerant heat dissipation line, a heater core and a third solenoid valve are provided in the passenger compartment heating line, an evaporator and a third electronic expansion valve are provided in the passenger compartment cooling line, and the third electronic expansion valve is located at the inlet end of the passenger compartment cooling line.

[0011] The present invention further discloses a vehicle including the thermal management system described above.

[0012] The present invention further discloses a thermal management method applicable to a thermal management system of a vehicle including an air conditioning management system, a motor management system, a battery management system, a passenger compartment management system, and a charger management system, the thermal management method including the air conditioning management system cooling the motor management system, the battery management system, the passenger compartment management system, and the charger management system via a refrigerant, and the air conditioning management system heating the battery management system and the passenger compartment management system via a refrigerant.

[0013] Furthermore, the motor management system includes a motor and a controller, and the air conditioning management system recovers heat from the motor and the controller via a refrigerant and supplies heat to the battery management system and the passenger compartment management system.

[0014] Furthermore, the vehicle has a high temperature running mode, a normal temperature running mode, a low temperature running mode, a low temperature cold start mode, and a parking charging mode, and in the low temperature cold start mode, the motor management system first heats up, and then the air conditioning management system recovers heat from the motor management system via a refrigerant to heat the battery management system and the passenger compartment management system, and in the parking charging mode, the air conditioning management system cools the battery management system or the charger management system via a refrigerant.

[0015] Compared with the related art, the thermal management system of the present invention is a refrigerant-based system that integrates the charger, and does not require the installation of separate equipment such as a coolant line, water pump, or coolant radiator to cool the charger. This significantly reduces the space occupied by the vehicle interior, while also improving the cooling efficiency of the refrigerant and enabling the charger to be cooled more effectively.

[0016] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. [Brief explanation of the drawings]

[0017] The drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present invention, and together with the specification, serve to explain the principles of the invention. [Figure 1] 1 is a diagram illustrating the principle of a thermal management system of the present invention; [Figure 2] FIG. 2 is a schematic diagram of the motor in FIG. 1 with a part of the housing removed. [Figure 3] FIG. 3 is a front view of the rotor in FIG. 2. DETAILED DESCRIPTION OF THE INVENTION

[0018] Illustrative embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description refers to the drawings, the same numerals in different drawings indicate the same or similar elements unless otherwise noted. It should be noted that the embodiments described in the following illustrative examples do not represent all embodiments consistent with the present invention. On the contrary, they are merely examples of apparatus and methods consistent with certain aspects of the present invention, as set forth in the appended claims.

[0019] The terms used in the present invention are merely for the purpose of describing particular embodiments and are not intended to limit the present invention. As used in the present invention and in the claims, the singular forms "a," "the," and "the" are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used in the present invention means to include any and all possible combinations of one or more of the associated listed items.

[0020] While the present invention may use terms such as "first," "second," and "third" to describe various pieces of information, it should be understood that such information is not limited to these terms. These terms are used only to distinguish between pieces of information of the same type. For example, first information may be referred to as "second information," and similarly, second information may be referred to as "first information" without departing from the scope of the present invention. Also, depending on the context, the word "if" used herein may be interpreted as "with," "when," or "in response to a determination."

[0021] Currently, as the battery capacity and charger power of new energy vehicles become larger and larger, the charger heat dissipation problem arises, and the charger cooling system of the related art occupies too much space and has insufficient cooling capacity.

[0022] In view of this, embodiments of the present invention provide a thermal management system, a thermal management method, and a vehicle. Hereinafter, embodiments of the present invention will be described in detail.

[0023] 1, the thermal management system of the present invention is applied to a vehicle and includes an air conditioning management system 100, a motor management system 200, a battery management system 300, a passenger compartment management system 400, and a charger management system 500. The air conditioning management system 100, the motor management system 200, the battery management system 300, the passenger compartment management system 400, and the charger management system 500 are connected via refrigerant lines.

[0024] The air conditioning management system 100 includes a main line 110 and a refrigerant heat dissipation line 120. The inlet end of the refrigerant heat dissipation line 120 is connected to the outlet end of the main line 110. A compressor 111, a pressure sensor 112, and a temperature sensor 113 are provided in the main line 110. The pressure sensor 112 is located on the side of the compressor 111 closer to the inlet end of the main line 110, and the temperature sensor 113 is located on the side of the compressor 111 closer to the outlet end of the main line 110. A first solenoid valve 121 and an air conditioning condenser 122 are provided in this order from the inlet end to the outlet end of the refrigerant heat dissipation line 120. When compressed by the compressor 111, the refrigerant becomes high-temperature and high-pressure. The high-temperature and high-pressure refrigerant releases heat as it passes through the air conditioning condenser 122, becoming low-temperature and high-pressure refrigerant.

[0025] The motor management system 200 includes a motor refrigerant path 210, a motor 220, and a controller 230. The motor 220 is a direct-refrigerant-cooled motor, and the refrigerant flows into one end of the motor 220, passes through the motor 220, and flows out from the other end of the motor 220. The inlet end of the motor refrigerant path 210 is connected to the outlet end of the refrigerant heat dissipation line 120, and the outlet end of the motor refrigerant path 210 is connected to the inlet end of the main line 110. A first electronic expansion valve 211 is provided at the inlet end of the motor refrigerant path 210, and the controller 230 is provided between the motor 220 and the first electronic expansion valve 211.

[0026] The low-temperature, high-pressure refrigerant flowing out of the air conditioner condenser 122 drops in temperature rapidly as it passes through the first electronic expansion valve 211. The low-temperature refrigerant first cools the controller 230, and then absorbs heat from the motor 220, lowering the temperature of the motor 220. The refrigerant carries the heat from the motor 220 and the controller 230 to the compressor 111 for heat recovery and utilization.

[0027] 2 and 3, a refrigerant inlet 221 is provided at one end of the housing of motor 220, and a refrigerant outlet 222 is provided at the other end of the housing of motor 220. The interior of motor 220 includes a rotor 223 that rotates about its axis, and a stator 224 that is provided inside the housing of motor 220 so as to surround rotor 223, with a gap between rotor 223 and stator 224. Rotor 223 is provided with four through holes 226 that extend along the axial direction, and through holes 226 are uniformly distributed within rotor 223 along the circumferential direction of rotor 223.

[0028] The coolant enters the motor 220 from the coolant inlet 221, passes through the through-holes 226 and the gap between the rotor 223 and the stator 224, and flows out from the coolant outlet 222. By directly contacting the rotor 223 and the stator 224, the coolant can cool the motor 220 better and can also more efficiently recover heat from the motor 220. Furthermore, because the coolant directly contacts the rotor 223 and the stator 224, when the motor 220 is cold, it can stall heat without burning out.

[0029] 1, the battery management system 300 includes a battery pack 310, a battery cooling line 320, and a battery heat supply line 330. The inlet end of the battery cooling line 320 is connected to the outlet end of the refrigerant heat dissipation line 120, and the outlet end of the battery cooling line 320 is connected to the inlet end of the main line 110. The inlet end of the battery heat supply line 330 is connected to the outlet end of the main line 110, and the outlet end of the battery heat supply line 330 is connected to the inlet end of the motor refrigerant path 210. A second electronic expansion valve 321 is provided at the inlet end of the battery cooling line 320. A second solenoid valve 331 is provided at the inlet end of the battery heat supply line 330.

[0030] The passenger compartment management system 400 includes a passenger compartment heating line 410 and a passenger compartment cooling line 420. The inlet and outlet ends of the passenger compartment heating line 410 are connected to the outlet end of the main line 110 and the inlet end of the motor refrigerant path 210, respectively. The outlet and inlet ends of the passenger compartment cooling line 420 are connected to the inlet end of the main line 110 and the outlet end of the refrigerant heat dissipation line 120, respectively. A third solenoid valve 411 and a heater core 412 are provided in this order from the inlet end to the outlet end of the passenger compartment heating line 410. A third electronic expansion valve 421 and an evaporator 422 are provided in this order from the inlet end to the outlet end of the passenger compartment cooling line 420.

[0031] The charger management system 500 includes a charger cooling line 510 and a charger 520 installed in the charger cooling line 510. The inlet end of the charger cooling line 510 is connected to the outlet end of the refrigerant heat dissipation line 120, and the outlet end of the charger cooling line 510 is connected to the inlet end of the main line 110. A fourth electronic expansion valve 511 is installed in the inlet end of the charger cooling line 510.

[0032] In the thermal management system of the present invention, the motor 220 is directly connected to the refrigerant line, and the refrigerant passes through the motor 220 and comes into direct contact with the rotor 223 and stator 224 of the motor 220, thereby achieving direct cooling of the motor 220 and heat recovery by the refrigerant. This method has high heat exchange efficiency and low heat loss, significantly improving the sustained power of the motor 220 at high temperatures, and improving the heat recovery and utilization rate of the motor 220 at low temperatures, allowing the heat pump performance to recover more quickly.

[0033] The thermal management system of the present invention uses a pure refrigerant line and does not require a coolant line, eliminating the need for a coolant radiator, water pump, and coolant line in the vehicle, which reduces the complexity of arranging the thermal management lines in the entire vehicle, reduces the volume of the thermal management system, and reduces the weight of the vehicle body.

[0034] In the present invention, the charger 520 and the controller 230 are integrated into the refrigerant line. When the temperature is high, the refrigerant is used to directly cool the charger 520 and the controller 230, resulting in a high cooling effect. When the temperature is low, the refrigerant is used to recover the heat of the controller 230, avoiding heat waste.

[0035] The present invention further discloses a vehicle including the thermal management system described above.

[0036] The present invention further discloses a thermal management method applicable to the thermal management system, which includes the air conditioning management system 100 cooling the motor management system 200, the battery management system 300, the passenger compartment management system 400, and the charger management system 500 via a refrigerant, and the air conditioning management system 100 heating the battery management system 300 and the passenger compartment management system 400 via a refrigerant.

[0037] The vehicle includes five driving modes: high temperature driving mode, normal temperature driving mode, low temperature driving mode, low temperature cold start mode and parking charging mode.

[0038] In the high-temperature driving mode, the motor 220 and the battery pack 310 need to be cooled, and the passenger compartment needs to be cooled. At this time, the air conditioner compressor 111 is operated, the second solenoid valve 331 is closed, the third solenoid valve 411 is closed, and the first solenoid valve 121 is opened. The first electronic expansion valve 211 is opened to cool the controller 230 and the motor 220, the second electronic expansion valve 321 is opened to dissipate heat from the battery pack 310, and the third electronic expansion valve 421 is opened to cool the passenger compartment. Because the temperature of the refrigerant passing through the expansion valve is approximately -10°C, the motor 220 is effectively cooled, and the sustained power and sustained torque of the motor 220 can be significantly improved.

[0039] In the normal temperature running mode, there is no need to cool the passenger compartment, but it is necessary to cool the battery pack 310 as needed and the motor 220. At this time, the air conditioner compressor 111 operates, the second solenoid valve 331 is closed, the third solenoid valve 411 is closed, the first solenoid valve 121 is opened, and the first electronic expansion valve 211 is opened to cool the controller 230 and the motor 220. When it is detected that the temperature of the battery pack 310 has exceeded a set value, the second electronic expansion valve 321 is opened to cool the battery pack 310.

[0040] In the low-temperature running mode, the passenger compartment and battery pack 310 need to be heated, and the motor 220 needs to be cooled. At this time, the compressor 111 operates, and the first solenoid valve 121 is closed. The second solenoid valve 331 is opened, and the high-temperature refrigerant reaches the battery pack 310 to heat it. The third solenoid valve 411 is opened, and the high-temperature refrigerant reaches the heater core 412 to heat the passenger compartment. After the refrigerant passes through the heater core 412 and the battery pack 310, the first electronic expansion valve 211 is opened, and the refrigerant passes through the controller 230 and the motor 220 to recover heat from the controller 230 and the motor 220.

[0041] The refrigerant and the motor 220 directly exchange heat, resulting in a larger temperature difference and higher heat recovery efficiency. The refrigerant then carries the heat of the controller 230 and the motor 220 and rejoins the circulation.

[0042] In low-temperature cold start mode, the battery pack 310 and passenger compartment must be heated. Because the ambient temperature is so low, the heat pump is barely operable. The compressor 111 operates, the first solenoid valve 121 is closed, and the first electronic expansion valve 211 is opened. The self-heating function of the motor 220 is turned on, the motor 220 stalls to release heat, and the refrigerant carries the heat of the motor 220 to the compressor 111 and enters the circulation system. The second solenoid valve 331 is opened, allowing the high-temperature refrigerant to reach the battery pack 310 and heat it. The third solenoid valve 411 is opened, allowing the high-temperature refrigerant to reach the heater core 412 and heat the passenger compartment.

[0043] Since the temperature of the refrigerant that has passed through the first electronic expansion valve 211 is approximately -10°C, the self-heating temperature of the motor 220 does not need to be very high, and the heat pump function can be quickly restored to heat the passenger compartment and the battery pack 310.

[0044] In the parking charging mode, the first solenoid valve 121 is opened, the second solenoid valve 331 is closed, the third solenoid valve 411 is closed, and the compressor 111 is operated. When the temperature of the battery pack 310 exceeds a set value, the second electronic expansion valve 321 is opened to cool the battery pack 310. When the temperature of the charger 520 exceeds a set value, the fourth electronic expansion valve 511 is opened to cool the charger 520.

[0045] The above are merely some embodiments of the present invention and do not limit the present invention. Although the present invention has been disclosed above in some embodiments, these embodiments do not limit the present invention. Those skilled in the art can make slight changes or modify equivalent embodiments by using the technical content disclosed above without departing from the scope of the technical solutions of the present invention. However, any simple modifications, equivalent changes and modifications made to the above examples based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention still fall within the scope of the technical solutions of the present invention. Explanation of symbols

[0046] 100 - air conditioning management system, 110 - main line, 111 - compressor, 112 - pressure sensor, 113 - temperature sensor, 120 - refrigerant heat dissipation line, 121 - first solenoid valve, 122 - air conditioning condenser, 200 - motor management system, 210 - motor refrigerant line, 211 - first electronic expansion valve, 220 - motor, 221 - refrigerant inlet, 222 - refrigerant outlet, 223 - rotor, 224 - stator, 225 - shaft seal, 226 - through hole, 230 - controller, 30 0 - battery management system, 310 - battery pack, 320 - battery cooling line, 321 - second electronic expansion valve, 330 - battery heat supply line, 331 - second solenoid valve, 400 - passenger compartment management system, 410 - passenger compartment heating line, 411 - third solenoid valve, 412 - heater core, 420 - passenger compartment cooling line, 421 - third electronic expansion valve, 422 - evaporator, 500 - charger management system, 510 - charger cooling line, 511 - fourth electronic expansion valve, 520 - charger.

Claims

1. A thermal management system applied to a vehicle, comprising an air conditioning management system, a motor management system, a battery management system, a passenger compartment management system, and a charger management system, wherein the air conditioning management system, the motor management system, the battery management system, the passenger compartment management system, and the charger management system are connected via a refrigerant line. Thermal management system.

2. The air conditioning management system includes a main line and a refrigerant heat dissipation line, an outflow end of the main line is connected to an inflow end of the refrigerant heat dissipation line, a compressor is provided in the main line, and an air conditioning condenser and a first solenoid valve are provided in the refrigerant heat dissipation line. The thermal management system of claim 1 .

3. The charger management system includes a charger cooling line and a charger provided in the charger cooling line, an outflow end and an inflow end of the charger cooling line are connected to an inflow end of the main line and an outflow end of the refrigerant heat dissipation line, respectively, and a fourth electronic expansion valve is provided in the inflow end of the charger cooling line. The thermal management system of claim 2 .

4. The motor management system includes a motor refrigerant path and a motor, the motor being a direct-cooled refrigerant motor, in which refrigerant flows into one end of the motor, passes through the motor, and flows out from the other end of the motor, the outflow end and the inflow end of the motor refrigerant path are connected to the inflow end of the main line and the outflow end of the refrigerant heat dissipation line, respectively, and a first electronic expansion valve is provided at the inflow end of the motor refrigerant path. The thermal management system of claim 2 .

5. The motor management system further includes a controller, the controller being disposed between the motor and the first electronic expansion valve, the motor including a rotor and a stator, the rotor and the stator being in direct contact with the refrigerant, and the motor being capable of stall heat dissipation; The thermal management system of claim 4 .

6. the battery management system includes a battery pack, a battery cooling line, and a battery heat supply line, an outflow end and an inflow end of the battery cooling line are respectively connected to the inflow end of the main line and the outflow end of the refrigerant heat dissipation line, an inflow end and an outflow end of the battery heat supply line are respectively connected to the outflow end of the main line and the inflow end of the motor refrigerant path, a second electronic expansion valve is provided at the inflow end of the battery cooling line, and a second solenoid valve is provided at the inflow end of the battery heat supply line; The thermal management system of claim 4 .

7. The passenger compartment management system includes a passenger compartment heating line and a passenger compartment cooling line, an inlet end and an outlet end of the passenger compartment heating line are respectively connected to the outlet end of the main line and the inlet end of the motor refrigerant path, an outlet end and an inlet end of the passenger compartment cooling line are respectively connected to the inlet end of the main line and the outlet end of the refrigerant heat dissipation line, a heater core and a third solenoid valve are provided in the passenger compartment heating line, an evaporator and a third electronic expansion valve are provided in the passenger compartment cooling line, and the third electronic expansion valve is located at the inlet end of the passenger compartment cooling line. The thermal management system of claim 4 .

8. A thermal management method applied to a thermal management system of a vehicle including an air conditioning management system, a motor management system, a battery management system, a passenger compartment management system, and a charger management system, the method including: the air conditioning management system cooling the motor management system, the battery management system, the passenger compartment management system, and the charger management system via a refrigerant; and the air conditioning management system heating the battery management system and the passenger compartment management system via the refrigerant. Heat management methods.

9. the motor management system includes a motor and a controller; The air conditioning management system further includes recovering heat from the motor and the controller via a refrigerant and supplying heat to the battery management system and the passenger compartment management system. The thermal management method of claim 8 .

10. The vehicle has a high temperature running mode, a normal temperature running mode, a low temperature running mode, a low temperature cold start mode, and a parking charging mode, In a low temperature cold start mode, the motor management system first heats up, and then the air conditioning management system recovers heat from the motor management system through a refrigerant to heat the battery management system and the passenger compartment management system; and in a parking charging mode, the air conditioning management system cools the battery management system or the charger management system through a refrigerant. The thermal management method of claim 9.

11. A vehicle including a thermal management system, the thermal management system including an air conditioning management system, a motor management system, a battery management system, a passenger compartment management system, and a charger management system, and the air conditioning management system, the motor management system, the battery management system, the passenger compartment management system, and the charger management system are connected via a refrigerant line. vehicle.

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