Thermal management system and thermal management method

Abstract

The application provides a heat management system and a heat management method. The heat management system comprises an air conditioner management system, a motor management system, a battery management system, a passenger cabin management system and a charger management system; the air conditioner management system is connected with the motor management system, the battery management system, the passenger cabin management system and the charger management system through a refrigerant pipeline. The heat management system of the application is a refrigerant system and integrates the charger, so that additional cooling liquid pipeline, water pump and cooling liquid radiator and other facilities are not needed to cool the charger, the occupation of the space in the vehicle is greatly reduced, and the cooling efficiency of the refrigerant is higher, so that the charger can be more effectively cooled.

Description

TECHNICAL FIELD

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

[0002] With the increasing popularity of new energy electric vehicles, the thermal management of new energy vehicles has always been a topic that cannot be avoided. The thermal management system of the battery, motor, passenger cabin air conditioner and charger is related to the normal operation and endurance of the vehicle. The battery capacity and charger power of the new energy electric vehicle are getting larger and larger, and the problem of charger heat dissipation follows. The existing charger cooling system occupies too much space and has insufficient cooling capacity.

[0003] Therefore, it is necessary to provide an improved thermal management system and a thermal management method to solve the above problems. SUMMARY

[0004] The present application provides a thermal management system and a thermal management method integrated with a charger.

[0005] The present application discloses a thermal management system, comprising an air conditioner management system, a motor management system, a battery management system, a passenger cabin management system and a charger management system; the air conditioner management system is connected with the motor management system, the battery management system, the passenger cabin management system and the charger management system through a refrigerant pipeline.

[0006] Further, the air conditioner management system comprises a main pipeline and a refrigerant heat dissipation pipeline; the outflow end of the main pipeline is connected with the inflow end of the refrigerant heat dissipation pipeline; the main pipeline is provided with a compressor; the refrigerant heat dissipation pipeline is provided with an air conditioner condenser and a solenoid valve one.

[0007] Further, the charger management system comprises a charger refrigeration pipeline and a charger arranged in the charger refrigeration pipeline; the outflow end and the inflow end of the charger refrigeration pipeline are connected with the inflow end of the main pipeline and the outflow end of the refrigerant heat dissipation pipeline respectively; the inflow end of the charger refrigeration pipeline is provided with an electronic expansion valve four.

[0008] Further, the motor management system comprises a motor refrigerant pipeline and a motor; the motor is a refrigerant direct cooling type motor, 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 pipeline are connected with the inflow end of the main pipeline and the outflow end of the refrigerant heat dissipation pipeline respectively; the inflow end of the motor refrigerant pipeline is provided with an electronic expansion valve one.

[0009] Further, the motor management system further comprises a controller; the controller is arranged between the motor and the electronic expansion valve; the motor comprises a rotor and a stator; the rotor and the stator are directly contacted with the refrigerant; the motor can generate locked-rotor heat.

[0010] Further, the battery management system comprises a battery pack, a battery refrigeration pipeline and a battery heating pipeline; the outflow end and the inflow end of the battery refrigeration pipeline are connected with the inflow end of the main pipeline and the outflow end of the refrigerant heat dissipation pipeline respectively; the inflow end and the outflow end of the battery heating pipeline are connected with the outflow end of the main pipeline and the inflow end of the motor refrigerant pipeline respectively; the inflow end of the battery refrigeration pipeline is provided with an electronic expansion valve two; the inflow end of the battery heating pipeline is provided with an electromagnetic valve two.

[0011] Further, the passenger cabin management system comprises a passenger cabin heating pipeline and a passenger cabin refrigeration pipeline; the inflow end and the outflow end of the passenger cabin heating pipeline are connected with the outflow end of the main pipeline and the inflow end of the motor refrigerant pipeline respectively; the outflow end and the inflow end of the passenger cabin refrigeration pipeline are connected with the inflow end of the main pipeline and the outflow end of the refrigerant heat dissipation pipeline respectively; the passenger cabin heating pipeline is provided with a heater core and an electromagnetic valve three; the passenger cabin refrigeration pipeline is provided with an evaporator and an electronic expansion valve three, and the electronic expansion valve three is located at the inflow end of the passenger cabin refrigeration pipeline.

[0012] The application further discloses a thermal management method applied to a thermal management system, the thermal management system comprising an air conditioner management system, a motor management system, a battery management system, a passenger cabin management system and a charger management system; the air conditioner management system cools the motor management system, the battery management system, the passenger cabin management system and the charger management system through refrigerant; the air conditioner management system heats the battery management system and the passenger cabin management system through refrigerant.

[0013] Further, the motor management system comprises a motor and a controller; the air conditioner management system recovers heat of the motor and the controller to heat the battery management system and the passenger cabin management system through refrigerant.

[0014] Further, the vehicle has a high-temperature driving mode, a normal-temperature driving mode, a warm-temperature driving mode, a low-temperature cold start mode and a parking charging mode; in the low-temperature cold start mode, the motor management system is first heated, and then the air conditioner management system recovers heat of the motor management system to heat the battery management system and the passenger cabin management system; in the parking charging mode, the air conditioner management system can refrigerate the battery management system or the charger management system through refrigerant.

[0015] Compared with the prior art, the thermal management system of the application is a refrigerant system and integrates a charger, without the need for additional cooling liquid pipelines, water pumps and cooling liquid radiators and other facilities to cool the charger, greatly reducing the occupation of the vehicle interior space, while the cooling efficiency of the refrigerant is higher, which can more effectively cool the charger.

[0016] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present specification. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present specification and serve to explain the principles of the present specification, together with the description.

[0018] Figure 1 is a schematic diagram of the thermal management system of the application.

[0019] Figure 2 is a schematic diagram of the thermal management system of the application. Figure 1 is a schematic diagram of the thermal management system of the application.

[0020] Figure 3 is a schematic diagram of the thermal management system of the application. Figure 2 is a front view of the rotor.

[0021] BRIEF DESCRIPTION OF DRAWINGS: Air conditioner management system, 100; main pipeline, 110; refrigerant heat dissipation pipeline, 120; motor management system, 200; motor refrigerant pipeline, 210; motor, 220; refrigerant inlet, 221; refrigerant outlet, 222; rotor, 223; stator, 224; shaft seal, 225; through hole, 226; controller, 230; battery management system, 300; battery pack, 310; battery refrigeration pipeline, 320; battery heat supply pipeline, 330; passenger compartment management system, 400; passenger compartment heat supply pipeline, 410; passenger compartment refrigeration pipeline, 420; charger pipeline system, 500; charger refrigeration pipeline, 510; charger, 520. DETAILED DESCRIPTION

[0022] The exemplary embodiments will be described in detail herein with reference to the attached drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present specification. Instead, they are merely examples of apparatuses and methods consistent with some aspects of the present specification as detailed in the appended claims.

[0023] The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of this specification. The singular forms “a,” “the,” and “the” as used in this specification and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0024] It should be understood that although the terms first, second, third, etc., may be used in this specification to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this specification, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0025] The embodiments described in this specification will now be described in detail.

[0026] like Figure 1 As shown, the thermal management system of this application 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 is connected to the motor management system 200, the battery management system 300, the passenger compartment management system 400, and the charger management system 500 via refrigerant piping.

[0027] The air conditioning management system 100 includes a main pipeline 110 and a refrigerant heat dissipation pipeline 120. The inflow end of the refrigerant heat dissipation pipeline 120 is connected to the outflow end of the main pipeline 110. A compressor, a pressure sensor, and a temperature sensor are installed on the main pipeline 110. The pressure sensor is located on the side of the compressor closer to the inflow end, and the temperature sensor is located on the side of the compressor closer to the outflow end. A solenoid valve and an air conditioning condenser are sequentially installed on the refrigerant heat dissipation pipeline 120 from the inflow end to the outflow end. After being compressed by the compressor, the refrigerant is in a high-temperature, high-pressure state. When the high-temperature, high-pressure refrigerant passes through the air conditioning condenser, it dissipates heat and becomes a low-temperature, high-pressure refrigerant.

[0028] The motor management system 200 includes a motor refrigerant circuit 210, a motor 220, and a controller 230. The inflow end of the motor refrigerant circuit 210 is connected to the outflow end of the refrigerant heat dissipation pipe 120, and the outflow end of the motor refrigerant circuit 210 is connected to the inflow end of the main pipe 110. An electronic expansion valve is installed at the inflow end of the motor refrigerant circuit 210, and the controller 230 is located between the motor 220 and the electronic expansion valve.

[0029] The low-temperature and high-pressure refrigerant passes through the electronic expansion valve 1, and the temperature of the refrigerant is sharply reduced. The low-temperature refrigerant first cools the controller 230, and then takes away the heat of the motor 220 to cool the motor. The refrigerant carrying the heat of the motor 220 and the controller 230 reaches the compressor to realize heat recycling.

[0030] As shown in FIG. 1, the motor 220 is connected to the main pipe 110 through the motor refrigerant circuit 210. The motor refrigerant circuit 210 includes an electronic expansion valve 1, a motor 220, and a motor refrigerant pipe 211. The motor refrigerant pipe 211 is connected to the main pipe 110 and the motor 220. Figure 2 As shown in FIG. 1, the motor 220 is connected to the main pipe 110 through the motor refrigerant circuit 210. The motor refrigerant circuit 210 includes an electronic expansion valve 1, a motor 220, and a motor refrigerant pipe 211. The motor refrigerant pipe 211 is connected to the main pipe 110 and the motor 220. Figure 3 As shown in FIG. 1, the motor 220 is connected to the main pipe 110 through the motor refrigerant circuit 210. The motor refrigerant circuit 210 includes an electronic expansion valve 1, a motor 220, and a motor refrigerant pipe 211. The motor refrigerant pipe 211 is connected to the main pipe 110 and the motor 220.

[0031] The refrigerant enters the motor 220 through the refrigerant inlet 221, passes through the through holes 226 and the gap between the rotor 223 and the stator 224, and flows out through the refrigerant outlet 222. The refrigerant directly contacts the rotor 223 and the stator 224, which can better cool the motor 220 and more efficiently recycle the heat of the motor 220. Moreover, because the refrigerant directly contacts the rotor 223 and the stator 224, the motor 220 can generate heat during locked-rotor operation at low temperature without worrying about burning the motor 220.

[0032] As shown in FIG. 1, the motor 220 is connected to the main pipe 110 through the motor refrigerant circuit 210. The motor refrigerant circuit 210 includes an electronic expansion valve 1, a motor 220, and a motor refrigerant pipe 211. The motor refrigerant pipe 211 is connected to the main pipe 110 and the motor 220. Figure 1 As shown in FIG. 2, the battery management system 300 includes a battery pack 310, a battery refrigeration pipe 320, and a battery heating pipe 330. The inflow end of the battery refrigeration pipe 320 is connected to the outflow end of the refrigerant heat dissipation pipe 120, and the outflow end of the battery refrigeration pipe 320 is connected to the inflow end of the main pipe 110. The inflow end of the battery heating pipe 330 is connected to the outflow end of the main pipe 110, and the outflow end of the battery heating pipe 330 is connected to the inflow end of the motor refrigerant circuit 210. The inflow end of the battery refrigeration pipe 320 is provided with an electronic expansion valve 2. The inflow end of the battery heating pipe 330 is provided with an electromagnetic valve 2.

[0033] The passenger compartment management system 400 includes a passenger compartment heating pipe 410 and a passenger compartment refrigeration pipe 420. The inflow end and the outflow end of the passenger compartment heating pipe 410 are respectively connected to the outflow end of the main pipe 110 and the inflow end of the motor refrigerant circuit 210. The outflow end and the inflow end of the passenger compartment refrigeration pipe 420 are respectively connected to the inflow end of the main pipe 110 and the outflow end of the refrigerant heat dissipation pipe 120. The passenger compartment heating pipe 410 is sequentially provided with an electromagnetic valve 3 and a heater core from the inflow end to the outflow end. The passenger compartment refrigeration pipe 420 is sequentially provided with an electronic expansion valve 3 and an evaporator from the inflow end to the outflow end.

[0034] The charger management system 500 comprises a charger refrigeration pipeline 510 and a charger 520 arranged in the charger refrigeration pipeline 510. The inflow end of the charger refrigeration pipeline 510 is connected with the outflow end of the refrigerant heat dissipation pipeline 120, and the outflow end of the charger refrigeration pipeline 510 is connected with the inflow end of the main pipeline 110. The inflow end of the charger refrigeration pipeline 510 is provided with an electronic expansion valve four.

[0035] The thermal management system of the application directly connects the motor 220 with the refrigerant pipeline, the refrigerant passes through the motor 220 and directly contacts with the rotor 223 and the stator 224 of the motor, so that the motor 220 is directly cooled and heat is recycled. The heat exchange efficiency is high, the heat loss is low, the continuous power of the motor 220 is greatly improved at high temperature, the heat recycling rate of the motor 220 is improved at low temperature, and the performance of the heat pump can be recovered faster.

[0036] The thermal management system of the application adopts a pure refrigerant pipeline, and does not need a cooling liquid pipeline. The cooling liquid radiator, water pump and cooling liquid pipeline do not need to be arranged in the vehicle, the arrangement difficulty of the whole vehicle thermal management pipeline is reduced, the volume of the thermal management system is reduced, and the weight of the vehicle body is reduced.

[0037] The charger 520 and the controller 230 are integrated in the refrigerant pipeline, the charger 520 and the controller 230 are directly cooled by the refrigerant at high temperature, the cooling effect is good, and the heat of the controller 230 is recycled by the refrigerant at low temperature, so that the heat waste is avoided.

[0038] The application further discloses a vehicle comprising the thermal management system.

[0039] 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 refrigerated. At this time, the air conditioner compressor works, the electromagnetic valve two is closed, the electromagnetic valve three is closed, and the electromagnetic valve one is opened. The electronic expansion valve one is opened to cool the controller 230 and the motor 220, the electronic expansion valve two is opened to cool the battery pack 310, and the electronic expansion valve three is opened to cool the passenger compartment. Since the temperature of the refrigerant after passing through the expansion valve is-10℃, the motor 220 can be effectively cooled, and the continuous power and the continuous torque of the motor 220 are greatly improved.

[0040] In the normal-temperature driving mode, the passenger compartment does not need to be refrigerated, the battery pack 310 needs to be cooled as needed, and the motor 220 needs to be cooled. At this time, the air conditioner compressor works, the electromagnetic valve two is closed, the electromagnetic valve three is closed, the electromagnetic valve one is opened, and the electronic expansion valve one is opened to cool the controller 230 and the motor 220. When it is detected that the temperature of the battery pack 310 exceeds the set value, the electronic expansion valve two is opened to cool the battery pack 310.

[0041] When the low-temperature driving mode is used, the passenger compartment and the battery pack 310 need to be heated, and the motor 220 needs to be cooled. At this time, the compressor works, and the electromagnetic valve one is closed. The electromagnetic valve two is opened, and the high-temperature refrigerant reaches the battery pack 310 to heat the battery pack 310. The electromagnetic valve three is opened, and the high-temperature refrigerant reaches the heater core to heat the passenger compartment. After the refrigerant passes through the heater core and the battery pack 310, the electronic expansion valve one is opened, and the refrigerant passes through the controller 230 and the motor 220 to perform heat recovery on the motor 220 and the controller 230.

[0042] Since the refrigerant and the motor 220 directly exchange heat, the temperature difference is larger, and the heat recovery efficiency is higher. Then the refrigerant carrying the heat of the controller 230 and the motor 220 participates in the cycle again.

[0043] When the low-temperature cold start mode is used, the battery pack 310 and the passenger compartment need to be heated. At this time, the ambient temperature is too low, and the heat pump is almost unable to work. The compressor is opened, the electromagnetic valve one is closed, and the electronic expansion valve one is opened. The motor 220 is self-heated, the motor 220 is blocked to generate heat, the refrigerant carries the heat of the motor 220 to the compressor to participate in the cycle. The electromagnetic valve two is opened, and the high-temperature refrigerant reaches the battery pack 310 to heat the battery pack 310. The electromagnetic valve three is opened, and the high-temperature refrigerant reaches the heater core to heat the passenger compartment.

[0044] Since the temperature of the refrigerant after passing through the electronic expansion valve two is about -10℃, the temperature of the motor 220 self-heating does not need to be too high to quickly restore the heat pump function to heat the passenger compartment and the battery pack 310.

[0045] When the parking charging mode is used, when the temperature of the battery pack 310 or the charger 520 exceeds the set value, the electromagnetic valve one is opened, the electromagnetic valve two is closed, the electromagnetic valve three is closed, and the compressor is opened. When the temperature of the battery pack 310 exceeds the set value, the electronic expansion valve two is opened to cool the battery pack 310. When the temperature of the charger 520 exceeds the set value, the electronic expansion valve four is opened to cool the charger 520.

[0046] The above only describes the preferred embodiments of the present application, and does not limit the present application in any form. Although the preferred embodiments of the present application have been disclosed as above, they are not intended to limit the present application. Any person skilled in the art can make some minor changes or modifications to the disclosed technical content without departing from the scope of the technical solutions of the present application, and any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application still belongs to the scope of the technical solutions of the present application.

[0047] The disclosed technical content is equivalent to the equivalent embodiments with slight changes or modifications, but as long as it does not deviate from the content of the technical solutions of the present application, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application still belongs to the scope of the technical solutions of the present application.

Claims

1. A thermal management system, characterized in that, include: Air conditioning management system, motor management system, battery management system, passenger compartment management system, and charger management system; The air conditioning management system is connected to the motor management system, battery management system, passenger compartment management system, and charger management system via refrigerant piping. The air conditioning management system includes a main pipeline and a refrigerant heat dissipation pipeline. The outlet end of the main pipeline is connected to the inlet end of the refrigerant heat dissipation pipeline. A compressor is installed on the main pipeline. An air conditioning condenser and a solenoid valve are installed on the refrigerant heat dissipation pipeline. The charger management system includes a charger cooling pipeline and a charger installed on the charger cooling pipeline. The outlet and inlet ends of the charger cooling pipeline are respectively connected to the inlet end of the main pipeline and the outlet end of the refrigerant heat dissipation pipeline. An electronic expansion valve is installed at the inlet end of the charger cooling pipeline. The motor management system includes a motor refrigerant pipeline and a motor. The outlet and inlet ends of the motor refrigerant pipeline are respectively connected to the inlet end of the main pipeline and the outlet end of the refrigerant heat dissipation pipeline. An electronic expansion valve is installed at the inlet end of the motor refrigerant pipeline. The battery management system includes a battery pack, a battery cooling pipeline, and a battery heating pipeline. The battery cooling pipeline... The outflow and inflow ends of the pipeline are respectively connected to the inflow end of the main pipeline and the outflow end of the refrigerant heat dissipation pipeline; the inflow and outflow ends of the battery heating pipeline are respectively connected to the outflow end of the main pipeline and the inflow end of the motor refrigerant pipeline; an electronic expansion valve II is provided at the inflow end of the battery cooling pipeline; a solenoid valve II is provided at the inflow end of the battery heating pipeline; the crew cabin management system includes a crew cabin heating pipeline and a crew cabin cooling pipeline; the inflow and outflow ends of the crew cabin heating pipeline are respectively connected to the outflow end of the main pipeline and the outflow end of the motor refrigerant pipeline; The outlet end is connected to the inflow end of the motor refrigerant circuit; the outlet end and inflow end of the passenger compartment cooling pipe are respectively connected to the inflow end of the main pipe and the outlet end of the refrigerant heat dissipation pipe; the passenger compartment heating pipe is equipped with a heater core and a solenoid valve three; the passenger compartment cooling pipe is equipped with an evaporator and an electronic expansion valve three, the electronic expansion valve three being located at the inflow end of the passenger compartment cooling pipe; the thermal management system has a high temperature driving mode, a normal temperature driving mode, a low temperature driving mode, a low temperature cold start mode, and a parking charging mode; In high-temperature driving mode, the compressor works, solenoid valve 2 is closed, solenoid valve 3 is closed, and solenoid valve 1 is open; electronic expansion valve 1 opens to cool the controller and motor, electronic expansion valve 2 opens to dissipate heat from the battery pack, and electronic expansion valve 3 opens to cool the passenger compartment. In normal temperature driving mode, the compressor works, solenoid valve 2 is closed, solenoid valve 3 is closed, solenoid valve 1 is open, and electronic expansion valve 1 is open to cool the controller and motor; when the battery pack temperature is detected to exceed the set value, electronic expansion valve 2 is opened to cool the battery pack. In low-temperature driving mode, the compressor works and solenoid valve one is closed; solenoid valve two is opened, and high-temperature refrigerant reaches the battery pack to heat the battery pack; solenoid valve three is opened, and high-temperature refrigerant reaches the heater core to heat the passenger compartment; after the refrigerant passes through the heater core and the battery pack, electronic expansion valve one is opened, and the refrigerant passes through the controller and motor to recover heat from the motor and controller. In low-temperature cold start mode, the compressor starts, the solenoid valve closes, and the electronic expansion valve opens; the motor self-heating is activated, the motor performs stall heating, and the refrigerant carries the heat from the motor to the compressor to participate in the cycle; When solenoid valve two opens, high-temperature refrigerant reaches the battery pack to heat it; when solenoid valve three opens, high-temperature refrigerant reaches the heater core to heat the passenger compartment. In parking charging mode, when the temperature of the battery pack or charger exceeds the set value, solenoid valve one opens, solenoid valve two closes, solenoid valve three closes, and the compressor turns on; when the temperature of the battery pack exceeds the set value, electronic expansion valve two opens to cool the battery pack; when the temperature of the charger exceeds the set value, electronic expansion valve four opens to cool the charger.

2. The thermal management system according to claim 1, characterized in that, The motor is a refrigerant direct-cooling motor, with refrigerant flowing in from one end of the motor, passing through the motor, and flowing out from the other end of the motor.

3. The thermal management system according to claim 2, characterized in that, The motor management system further includes a controller; the controller is located between the motor and the electronic expansion valve; the motor includes a rotor and a stator; the rotor and the stator are in direct contact with the refrigerant.

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