Heat management system and heat management method of vehicle and vehicle

Abstract

The invention discloses a heat management system for a vehicle, a heat management method and the vehicle with the system. The heat management system comprises an electric drive module, and lubricating oil flows through the electric drive module for heat exchange; the lubricating oil and the cooling liquid are thermally coupled through the oil path heat exchanger; the refrigerant module comprises a compressor, an evaporator and a condenser, and a refrigerant is arranged in the refrigerant module; wherein the evaporator comprises a first evaporator, and the lubricating oil and the refrigerant are thermally coupled through the first evaporator. By means of the heat management system, the heat management efficiency of the vehicle can be improved, and the effects of improving the air conditioner heating effect and improving the performance of the electric drive module are achieved.

Description

Technical Field

[0001] The present application relates to thermal management in vehicles, particularly electric vehicles. Background Art

[0002] Vehicles, particularly electric vehicles, include electric drive systems (EDS), power batteries, and heating, ventilation, and air conditioning (HVAC) systems. The components of the EDS typically include a motor, controller, and reduction gearbox. These components generate heat during operation and require heat dissipation. In the art, heat can be dissipated from at least one of these components by flowing lubricating oil through the EDS, and the heat in the oil can be further removed by coolant. However, this approach fails to fully utilize the heat in the EDS, and there is room for further improvement in the efficiency of heat management in vehicles.

[0003] The information provided in this section is for the purpose of generally presenting the background of the application and therefore may contain information that does not form the prior art in the art. Summary of the Invention

[0004] The purpose of this application is to solve or at least alleviate one or more problems existing in the prior art.

[0005] One aspect of the present application relates to a thermal management system for a vehicle, comprising:

[0006] Electric drive module, lubricating oil flows through the electric drive module for heat exchange,

[0007] The oil heat exchanger is used to thermally couple the lubricating oil and the coolant.

[0008] The refrigerant module includes a compressor, an evaporator, and a condenser. The refrigerant is provided in the refrigerant module.

[0009] The evaporator includes a first evaporator, and the lubricating oil and the refrigerant are thermally coupled via the first evaporator.

[0010] In an embodiment of the present application, optionally, the evaporator also includes a second evaporator, the refrigerant module includes a refrigerant regulating valve for adjusting the refrigerant flow rate flowing through the first evaporator and the second evaporator, the refrigerant and the coolant are thermally coupled via the second evaporator, and the refrigerant and the coolant are also thermally coupled via the condenser.

[0011] In an embodiment of the present application, optionally, when thermal coupling is performed in the first evaporator, the refrigerant absorbs heat from the lubricating oil, and / or, when thermal coupling is performed in the second evaporator, the refrigerant absorbs heat from the coolant, and / or, when thermal coupling is performed in the condenser, the refrigerant releases heat to the coolant.

[0012] In an embodiment of the present application, optionally, the coolants in the first evaporator, the second evaporator and the condenser are fluidly connected and disconnected via a coolant regulating valve.

[0013] In an embodiment of the present application, optionally, the oil heat exchanger and the flow path of the lubricating oil in the first evaporator are arranged in series, and a first bypass branch of the lubricating oil is provided at the oil heat exchanger and / or a second bypass branch of the lubricating oil is provided at the first evaporator; or,

[0014] The oil heat exchanger and the flow path of the lubricating oil in the first evaporator are arranged in parallel.

[0015] In an embodiment of the present application, optionally,

[0016] The coolant flowing through the second evaporator is configured to be used for at least one of the following: cooling the passenger compartment of the vehicle; cooling the power battery; cooling the components of the electric drive module; and / or,

[0017] The coolant flowing through the condenser is configured to be used for at least one of the following: heating a passenger compartment of a vehicle; heating a power battery; and / or,

[0018] The coolant flowing through the oil heat exchanger is configured to be used for at least one of the following: heating the power battery; heating the passenger compartment of the vehicle; and heating the refrigerant in the second evaporator.

[0019] In an embodiment of the present application, optionally, the electric drive module includes a shell, and at least one of the following is integrated on the outer surface of the shell: one or more components in the refrigerant module, and the oil circuit heat exchanger.

[0020] Another aspect of the present application relates to a method for thermal management of a vehicle using any of the thermal management systems described above, comprising the following steps:

[0021] Detect the temperature of the electric drive module,

[0022] When the temperature of the electric drive module is higher than a first electric drive temperature threshold and lower than a second electric drive temperature threshold, controlling the coolant to cool the lubricating oil via the oil circuit heat exchanger, controlling the refrigerant not to flow through the first evaporator and / or controlling the lubricating oil not to flow through the first evaporator;

[0023] When the temperature of the electric drive module is above the second electric drive temperature threshold, the refrigerant is controlled to cool the lubricating oil via the first evaporator.

[0024] In an embodiment of the present application, optionally, when the temperature of the electric drive module is above the second electric drive temperature threshold,

[0025] Controlling the coolant to cool the lubricating oil via the oil circuit heat exchanger, and controlling the refrigerant to cool the lubricating oil via the first evaporator; or,

[0026] The lubricating oil is cooled by the refrigerant through the first evaporator, and the lubricating oil is controlled not to be cooled by the coolant through the oil heat exchanger, wherein,

[0027] All of the lubricating oil flows through the first evaporator to be cooled by the refrigerant, or part of the lubricating oil flows through the first evaporator to be cooled by the refrigerant.

[0028] Another aspect of the present application relates to a method for thermal management of a vehicle using any of the thermal management systems described above, comprising the following steps:

[0029] detecting the power of the electric drive module,

[0030] When the power of the electric drive module is lower than the electric drive power threshold, the refrigerant is controlled not to flow through the first evaporator and / or the lubricating oil is controlled not to flow through the first evaporator.

[0031] When the power of the electric drive module is higher than an electric drive power threshold, the refrigerant and the lubricating oil are controlled to flow through the first evaporator to perform heat exchange in the first evaporator.

[0032] The present application also relates to a method for thermal management of a vehicle using any of the thermal management systems described above, comprising the following steps:

[0033] Detect ambient temperature or passenger compartment temperature,

[0034] When the ambient temperature is lower than the ambient temperature threshold, or when the passenger compartment temperature is lower than the passenger compartment temperature threshold,

[0035] The refrigerant and the lubricating oil are controlled to flow through the first evaporator to perform heat exchange in the first evaporator.

[0036] The present application also relates to a vehicle having a thermal management system according to any one of the above items. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The disclosure of this application will be more easily understood with reference to the accompanying drawings. Those skilled in the art will readily appreciate that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this application. Furthermore, similar numbers in the figures represent similar components, where:

[0038] Figure 1a -b shows a schematic diagram comparing the before and after improvements to a vehicle thermal management system according to the present application;

[0039] Figure 2 A schematic diagram illustrating a thermal management system for a vehicle according to an embodiment of the present application is shown;

[0040] Figure 3 A schematic diagram illustrating a thermal management system for a vehicle according to another embodiment of the present application is shown;

[0041] Figure 4 A schematic diagram showing a thermal management system for a vehicle according to another embodiment of the present application;

[0042] Figure 5 A schematic diagram illustrating an integration method of a refrigerant module and an electric drive module according to an embodiment of the present application;

[0043] Figure 6 A schematic diagram showing an integration method of a refrigerant module and an electric drive module according to another embodiment of the present application;

[0044] Figure 7 A block diagram illustrating a method for thermal management of a vehicle according to an embodiment of the present application;

[0045] Figure 8 A block diagram illustrating a method for thermal management of a vehicle according to another embodiment of the present application;

[0046] Figure 9 A block diagram illustrating a method for thermal management of a vehicle according to another embodiment of the present application;

[0047] List of reference numerals: lubricating oil circuit 10, refrigerant circuit 20, coolant circuit 40, electric drive module 100, refrigerant module 200, compressor 210, first evaporator 221, refrigerant inlet 2211, refrigerant outlet 2212, second evaporator 222, condenser 230, liquid storage tank 240, first refrigerant regulating valve 251, second refrigerant regulating valve 252, oil circuit heat exchanger 310, coolant inlet 3101, coolant outlet 3102, first lubricating oil regulating valve 321, second lubricating oil regulating valve 322, oil filter 330, oil pump 340, first bypass branch 351, second bypass branch 352. DETAILED DESCRIPTION

[0048] First, it should be noted that the following will illustrate the components, features, and advantages of the thermal management system, thermal management method, and vehicle according to the present application by way of example. However, it should be understood that all descriptions are provided for illustrative purposes only and should not be construed as limiting the present application in any way. In this document, the technical terms "first" and "second" are used solely for distinguishing purposes and are not intended to indicate their order or relative importance. The description of a "first technical feature A" related to a technical feature A does not necessarily imply the existence of a corresponding "second technical feature A," and vice versa. The technical term "connected (or connected, etc.)" encompasses the direct connection of a particular component to another component and / or the indirect connection to another component. Furthermore, unless otherwise expressly specified or limited, the technical terms "length," "width," "height," "top," "top," "bottom," etc., indicating dimensions, directions, or positional relationships, are based on the dimensions, orientations, or positional relationships shown in the accompanying drawings and are provided solely for the purpose of facilitating the description of the present application and simplifying the description, and should not be construed as limiting the present application.

[0049] In addition, for any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature shown or implied in the drawings, this application still allows for any combination or deletion between these technical features (or their equivalents) without any technical obstacles, thereby obtaining more other embodiments of the application that may not be directly mentioned herein. In addition, general matters that are already known to those skilled in the art will not be repeated herein.

[0050] Figure 1a A simplified schematic diagram of a vehicle thermal management system before improvement is shown. The lubricating oil circuit 10 cools the EDS, and the lubricating oil heat exchanger transfers the heat in the EDS to the coolant circuit 40. The coolant circuit 40 then transfers the heat to the refrigerant circuit 20 in the HVAC through the heat exchanger, and the heat is transferred out through the cooling capacity of the air conditioning system. One disadvantage of this solution is that the heat in the EDS has to go through two heat exchange processes before it reaches the HVAC, resulting in two heat exchange losses. In addition, the heat exchange efficiency between the coolant and the lubricating oil and the refrigerant is low, resulting in lower overall heat exchange efficiency. For example, in one case, the heat exchange efficiency between the lubricating oil and the coolant is 54%, and the heat exchange efficiency between the coolant and the refrigerant is 85%. The combination of the two results in lower overall heat exchange efficiency.

[0051] Figure 1bA simplified schematic diagram of an improved solution of the present application is shown in the figure, in which the lubricating oil circuit 10 and the refrigerant circuit 20 are directly exchanged through a heat exchanger. Since the heat exchange efficiency between the refrigerant and the lubricating oil is higher, which can be, for example, 92%, the heat exchange efficiency is greatly improved. On the one hand, this improvement improves the cooling effect on the EDS, so that in the scenario where the EDS performance explodes, the lubricating oil temperature of the EDS can be effectively reduced, and the continuous power and peak duration of the EDS can be significantly improved. On the other hand, when the HVAC is heating, the high-grade heat source from the lubricating oil can be directly utilized, and the heating effect of the air conditioner is also significantly improved, the heating is faster, the heating efficiency is higher and the heating cost is lower. It can also reduce or avoid PTC heating and hot gas bypass, thereby simplifying the heating system components, reducing costs and improving reliability. Furthermore, the utilization rate of the waste heat of the EDS is improved under winter conditions, which reduces the energy consumption of thermal management and improves the low-temperature endurance. The following further explains the technical solution of the present application in detail through examples.

[0052] Figure 2 A schematic diagram of an embodiment of the thermal management system of the present application is shown. The thermal management system includes an electric drive module 100, which includes components such as a motor, a controller, and a reduction gearbox. A lubricating oil circuit 10 flows through the electric drive module 100 to lubricate and cool at least one of these components. The electric drive module and electric drive system / EDS herein can be used interchangeably. The thermal management system also includes an oil heat exchanger 310, which is provided on the lubricating oil circuit 10. The lubricating oil can be thermally coupled with the coolant in the coolant circuit 40 in the oil heat exchanger 310. The lubricating oil circuit 10 can be provided with an oil pump 340 for driving the flow of the lubricating oil, and an oil filter 330 for filtering the lubricating oil. The oil filter 330 can be provided at a position before the lubricating oil circuit enters the oil heat exchanger 310. The thermal management system also includes a refrigerant module 200. The lubricating oil circuit 10 can flow through an evaporator to achieve thermal coupling with the refrigerant module 200. The refrigerant module includes components such as a compressor 210, an evaporator, a condenser 230 and a liquid storage tank 240. The refrigerant circuit 20 flows through these components. The refrigerant module absorbs and releases heat through the evaporation and condensation of the refrigerant to achieve cooling and heating.

[0053] The evaporator may further include a first evaporator 221 and a second evaporator 222. The refrigerant may flow through the first evaporator 221 to thermally couple with the lubricating oil via the first evaporator. The refrigerant may also flow through the second evaporator 222 to thermally couple with the coolant in the coolant circuit 40 via the second evaporator. The refrigerant module may be provided with a refrigerant regulating valve to adjust the refrigerant flow rate / ratio flowing through the first and second evaporators. For example, the refrigerant circuit 20 may be provided with a first refrigerant regulating valve 251 and a second refrigerant regulating valve 252. The first refrigerant regulating valve 251 is located on the refrigerant branch where the first evaporator 221 is located. It can regulate the flow rate of the refrigerant passing through the first evaporator 221. The opening of the first refrigerant regulating valve 251 can be adjusted from zero to maximum. When the opening is zero, the refrigerant does not flow through the first evaporator 221. The second refrigerant regulating valve 252 is located on the branch line where the second evaporator 222 is located. It regulates the flow of refrigerant through the second evaporator 222. Its opening can be adjusted from zero to maximum. When the opening is zero, no refrigerant flows through the second evaporator 222. Therefore, by controlling the first refrigerant regulating valve 251 and the second refrigerant regulating valve 252, the flow rate and ratio of refrigerant flowing through the first evaporator 221 and the second evaporator 222 can be controlled. Specifically, the first refrigerant regulating valve 251 and the second refrigerant regulating valve 252 can be electronic expansion valves. The refrigerant can also be thermally coupled to the coolant in the coolant circuit 40 through the condenser 230.

[0054] In the embodiment shown in the accompanying drawings, the refrigerant in the evaporator in the refrigerant module 200 only undergoes a heat absorption process, and the refrigerant in the condenser 230 only undergoes a heat release process. When the refrigerant module 200 is heating the outside world, heat is transported to the outside world by the coolant flowing through the condenser 230. When the refrigerant module 200 is cooling the outside world, cold air is transported to the outside world by the lubricating oil and / or coolant at the evaporator. Therefore, the refrigerant module or HVAC in this application can optionally be an indirect (or secondary loop) air-conditioning system, which has a simpler component composition and is more conducive to structural integration than a direct air-conditioning system, which will be further described in detail below. The HVAC / air-conditioning system and refrigerant module in this article can be used interchangeably.

[0055] The flow of lubricating oil in the lubricating oil circuit 10 through the oil heat exchanger 310 and the first evaporator 221 can be controlled by one or more lubricating oil regulating valves. As shown in more detail below, the lubricating oil regulating valves may include a first lubricating oil regulating valve 321 and a second lubricating oil regulating valve 322. Figure 2 In the embodiment, the flow path of the lubricating oil in the oil heat exchanger 310 and the flow path of the lubricating oil in the first evaporator are arranged in series, and a first bypass branch 351 of the lubricating oil is also provided at the oil heat exchanger 310. The flow rate and ratio of the lubricating oil in the oil heat exchanger 310 and the first bypass branch 351 can be adjusted by the first lubricating oil regulating valve 321. Figure 3Another embodiment is shown, in which the oil heat exchanger 310 and the lubricating oil flow path in the first evaporator 221 are arranged in series, and a second lubricating oil bypass branch 352 is also provided at the first evaporator 221. The second lubricating oil regulating valve 322 can adjust the flow rate and ratio of the lubricating oil flowing through the first evaporator 221 and the second bypass branch 352. The flow rate and / or ratio of the lubricating oil between the oil heat exchanger and the first evaporator can also be adjusted by adjusting the flow rate of the lubricating oil in the first bypass branch 351 and / or the second bypass branch 352 in any suitable manner.

[0056] Apart from Figure 2 and Figure 3 The oil heat exchanger 310 and the flow path of the lubricating oil in the first evaporator 221 can also be arranged in parallel, as shown in FIG. Figure 4 As shown, the flow rate and ratio of the lubricating oil in the first evaporator 221 and the oil heat exchanger 310 can be adjusted by the third lubricating oil regulating valve 323. In another embodiment, the oil heat exchanger 310 is arranged in parallel with the lubricating oil circuit in the first evaporator, and a third bypass branch (not shown) for the lubricating oil can also be provided. The flow path of the lubricating oil in the third bypass branch is arranged in parallel with the flow paths of the lubricating oil in the first evaporator 221 and the oil heat exchanger 310. The flow rate of the lubricating oil flowing through the first evaporator and the oil heat exchanger can be adjusted by adjusting the flow rate of the lubricating oil in the third bypass branch.

[0057] In the embodiments of the present application, the coolant circuit 40 can be thermally coupled with different media at multiple locations. As described above, the coolant circuit 40 can exchange heat with lubricating oil and refrigerant in the oil heat exchanger 310, the second evaporator 222, and the condenser 230, respectively, and can perform different types of heat exchange processes, such as heat absorption and heat release. The coolant at different locations in the coolant circuit 40 can be fluidically connected and disconnected via one or more coolant regulating valves. The coolant can be antifreeze for the vehicle.

[0058] In some embodiments, the coolant flowing through the second evaporator 222 can be used for at least one of the following: delivering cold air to / cooling the vehicle's passenger compartment; cooling the power battery to prevent overheating or to rapidly cool it in the event of thermal runaway; or cooling components in the electric drive module, such as the electric drive controller. In some embodiments, the coolant flowing through the condenser 230 is configured to be used for at least one of the following: heating the vehicle's passenger compartment; or heating the power battery. In some embodiments, after absorbing heat from the lubricating oil, the coolant flowing through the oil heat exchanger 310 can be used for at least one of the following: heating the power battery to prevent low battery temperatures from affecting its performance and lifespan; delivering heat to / heating the vehicle's passenger compartment; or transferring heat to the refrigerant in the second evaporator 222. In embodiments of the present application, delivering heat to / heating the passenger compartment includes raising the cabin temperature to a comfortable level, and may also include other heating functions such as demisting and defrosting the vehicle. Similarly, delivering cooling to the passenger compartment involves lowering the cabin temperature to a comfortable level, and may also involve cooling onboard refrigeration equipment (e.g., a refrigerator) to meet other cabin cooling needs. Coolant heating / cooling the vehicle's passenger compartment is typically accomplished by heating / cooling air and delivering the heated / cooled air to designated locations within the cabin.

[0059] Since the refrigerant module in the embodiment of the present application can be a secondary circuit air conditioning system, it can be easily fully or at least partially integrated on the housing of the electric drive module and arranged in a more compact and efficient space utilization manner. Figure 5 The figure shows a schematic diagram of an embodiment of the integration of the refrigerant module and the electric drive module. In this embodiment, all components of the refrigerant module and the oil heat exchanger are integrated on the outer surface of the shell of the electric drive module. The components in the refrigerant module are arranged and installed on the electric drive module in sequence according to the refrigerant circulation path, and the refrigerant inlet and outlet of each component are connected by an external refrigerant pipeline 260. The refrigerant circulation flow direction is as follows: Figure 5As shown by the middle arrow, the gas is compressed into a high-temperature and high-pressure gas by the compressor, enters the condenser 230 and condenses into a high-temperature and high-pressure gas-liquid mixture, enters the liquid storage tank 240 for gas-liquid separation, and the liquid is then divided into two paths, entering the first refrigerant regulating valve 251 and the second refrigerant regulating valve 252 respectively. The opening of the refrigerant regulating valve is used to control the refrigerant flow entering the two evaporators 221 and 222 accordingly. After the refrigerant evaporates and absorbs heat in the evaporator, it merges into one path and enters the suction port of the compressor 210. After being compressed by the compressor, it enters the next cycle. Specifically, the compressor 210, the condenser 230, the liquid storage tank 240, the first refrigerant regulating valve 251, the second refrigerant regulating valve 252, the first evaporator 221, and the second evaporator 222 are all arranged on the housing of the electric drive module 100, and the oil circuit heat exchanger 310 is also integrated on the housing of the electric drive module. Figure 5 In the embodiment, the refrigerant pipeline 260 is an external pipeline. In addition to this connection method, a refrigerant pipeline can also be set inside the electric drive module housing. After the components in the refrigerant module are fixed to the outside of the housing of the electric drive module, they are connected through the refrigerant pipeline inside the housing, so that the integration of the equipment is further improved. In other embodiments, an adapter plate can be set between the electric drive module and the components of the refrigerant module, and a refrigerant channel and a lubricating oil channel can be set in the adapter plate. The components of the refrigerant module are first fixed and connected to the adapter plate, and then installed on the housing of the electric drive module. The refrigerant channel in the adapter plate is connected to the fluid of the components of the refrigerant module through the refrigerant interface thereon, and the lubricating oil channel in the adapter plate is connected to the lubricating oil fluid in the electric drive module through the lubricating oil interface thereon.

[0060] In another embodiment, the components in the refrigerant module can also be partially integrated into the electric drive module, for example, only the first evaporator 221 in the refrigerant module is integrated into the electric drive module. For example, the first evaporator 221 and the oil circuit heat exchanger 310 are integrated into the electric drive module 100, referring to FIG. Figure 6 . Figure 6 In the example, the coolant inlet 3101 and the coolant outlet 3102 of the oil heat exchanger 310 are connected to the coolant circuit so that the coolant and the lubricating oil are thermally coupled therein. The first evaporator is connected to the refrigerant module via the refrigerant inlet 2211 and the refrigerant outlet 2212 so that the lubricating oil in the electric drive module and the refrigerant in the refrigerant module are thermally coupled therein. For those situations where it is not possible to integrate all the components of the refrigerant module into the electric drive module due to limited space, or when the refrigerant module does not belong to the secondary circuit air conditioning system, a refrigerant module can be used. Figure 6 In the embodiment.

[0061] The technical solution of the heat management system of the present application can be modified in the layout of the existing vehicle by adding an evaporator (first evaporator 221) to the refrigerant module and connecting appropriate pipelines. In addition to the above embodiments, the electric drive module can also be configured to not integrate any components of the refrigerant module. For example, when the existing equipment is improved according to the technical solution of the present application, the components of the refrigerant module are fixed or cannot be changed, or the spatial distance between the components of the refrigerant module and the electric drive module is too large and is not suitable for integration. In this case, the electric drive module can be connected to the refrigerant module (such as the first evaporator) through a lubricating oil pipeline.

[0062] The present application also relates to a method for thermal management of a vehicle, in particular, a method for thermal management of a vehicle according to the thermal management system described above. In an embodiment of the method, thermal management of the electric drive module can be performed according to its operating temperature. Figure 7 In one embodiment, the method includes detecting a temperature Te of the electric drive module (step 1010). The electric drive module temperature Te may be the temperature of one or more locations in the electric drive system or the temperature of one or more components in the electric drive system, and comparing Te with a temperature threshold (step 1020). When the electric drive module temperature Te is higher than a first electric drive temperature threshold Te1 and lower than a second electric drive temperature threshold Te2, the lubricating oil is cooled only by coolant through the oil heat exchanger, and the lubricating oil is not cooled by refrigerant through the first evaporator. That is, the coolant and lubricating oil circuits are controlled to flow through the oil heat exchanger 310, and the refrigerant is controlled not to flow through the first evaporator 221 and / or the lubricating oil is controlled not to flow through the first evaporator 221. When the electric drive module temperature Te is higher than the second electric drive temperature threshold Te2, the electric drive module temperature is too high and the coolant may not be sufficient to achieve optimal cooling. In this case, the lubricating oil is cooled by a refrigerant with higher cooling efficiency through the first evaporator, as shown in step 1020. In step 1020, when Te ≥ Te2, the lubricating oil may be cooled simultaneously via the coolant through the oil circuit heat exchanger and via the refrigerant through the first evaporator, or only via the refrigerant through the first evaporator without sampling the coolant. When the lubricating oil is cooled only via the refrigerant, all of the lubricating oil in the lubricating oil circuit may be cooled via the refrigerant, or only a portion of the lubricating oil in the lubricating oil circuit may be cooled via the refrigerant, so that the lubricating oil is cooled according to cooling requirements, which can be determined based on the temperature of the electric drive module.

[0063] Another aspect of the present application relates to a method for thermal management of a vehicle based on the power of an electric drive module. Figure 8The method includes, in step 2010, detecting the power Pe of the electric drive module, when Pe is lower than the electric drive power threshold Pe0, preventing the refrigerant and / or lubricating oil from flowing through the first evaporator, and when Pe is above the electric drive power threshold Pe0, the electric drive module requires a greater cooling power, controlling the refrigerant and lubricating oil to flow through the first evaporator to perform heat exchange in the first evaporator.

[0064] Another aspect of the present application relates to a method for thermal management of a vehicle according to the vehicle's passenger compartment temperature or ambient temperature, for example, in a scenario where the air conditioning heating function is turned on in winter, Figure 9 As described in

[15] , the method includes, in step 3010, detecting an ambient temperature Ta or a passenger compartment temperature Tc. When the ambient temperature Ta is lower than an ambient temperature threshold Ta0, or when the passenger compartment temperature Tc is lower than a passenger compartment temperature threshold Tc0, controlling the refrigerant and lubricating oil to flow through the first evaporator to exchange heat in the first evaporator 221. By using the higher temperature lubricating oil as the heat source for the evaporator, the heating effect of the air conditioner can be greatly improved.

[0065] One aspect of the present application also relates to a vehicle, which has the thermal management system in any one of the above embodiments, and / or can execute the thermal management method disclosed in any one of the above embodiments.

[0066] The specific embodiments described above are intended only to more clearly illustrate the principles of the present invention, wherein the various components are clearly shown or described to make the principles of the present invention easier to understand. Those skilled in the art may readily make various modifications or variations to the present invention without departing from the scope of the present invention. It should be understood that such modifications or variations are intended to be within the scope of the present invention.

Claims

1. A thermal management system for a vehicle, comprising: Electric drive module, lubricating oil flows through the electric drive module for heat exchange, The oil heat exchanger is used to thermally couple the lubricating oil and the coolant. The refrigerant module includes a compressor, an evaporator, and a condenser. The refrigerant is provided in the refrigerant module. The evaporator includes a first evaporator, and the lubricating oil and the refrigerant are thermally coupled via the first evaporator.

2. The heat management system according to claim 1, wherein: The evaporator also includes a second evaporator, and the refrigerant module includes a refrigerant regulating valve for regulating the refrigerant flow through the first evaporator and the second evaporator. The refrigerant and the coolant are thermally coupled via the second evaporator, and the refrigerant and the coolant are also thermally coupled via the condenser.

3. The heat management system according to claim 2, wherein: When thermally coupled in the first evaporator, the refrigerant absorbs heat from the lubricating oil, and / or, when thermally coupled in the second evaporator, the refrigerant absorbs heat from the coolant, and / or, when thermally coupled in the condenser, the refrigerant releases heat to the coolant.

4. The heat management system according to claim 2 or 3, wherein: The coolants in the first evaporator, the second evaporator and the condenser are fluidly connected and disconnected via a coolant regulating valve.

5. The heat management system according to claim 1, wherein: The oil heat exchanger and the flow path of the lubricating oil in the first evaporator are arranged in series, and a first bypass branch of the lubricating oil is provided at the oil heat exchanger and / or a second bypass branch of the lubricating oil is provided at the first evaporator; or, The oil heat exchanger and the flow path of the lubricating oil in the first evaporator are arranged in parallel.

6. The heat management system according to claim 2, wherein: The coolant flowing through the second evaporator is configured to be used for at least one of the following: cooling the passenger compartment of the vehicle; cooling the power battery; cooling the components of the electric drive module; and / or, The coolant flowing through the condenser is configured to be used for at least one of the following: heating a passenger compartment of a vehicle; heating a power battery; and / or, The coolant flowing through the oil heat exchanger is configured to be used for at least one of the following: heating the power battery; heating the passenger compartment of the vehicle; and heating the refrigerant in the second evaporator.

7. A method for thermal management of a vehicle using the thermal management system according to any one of claims 1 to 6, comprising the following steps: Detect the temperature of the electric drive module, When the temperature of the electric drive module is higher than a first electric drive temperature threshold and lower than a second electric drive temperature threshold, controlling the coolant to cool the lubricating oil via the oil circuit heat exchanger, controlling the refrigerant not to flow through the first evaporator and / or controlling the lubricating oil not to flow through the first evaporator; When the temperature of the electric drive module is above the second electric drive temperature threshold, the refrigerant is controlled to cool the lubricating oil via the first evaporator.

8. The method according to claim 7, wherein: When the temperature of the electric drive module is above the second electric drive temperature threshold, Controlling the coolant to cool the lubricating oil via the oil circuit heat exchanger, and controlling the refrigerant to cool the lubricating oil via the first evaporator; or, The lubricating oil is cooled by the refrigerant through the first evaporator, and the lubricating oil is controlled not to be cooled by the coolant through the oil heat exchanger, wherein, All of the lubricating oil flows through the first evaporator to be cooled by the refrigerant, or part of the lubricating oil flows through the first evaporator to be cooled by the refrigerant.

9. A method for thermal management of a vehicle using the thermal management system according to any one of claims 1 to 6, comprising the following steps: detecting the power of the electric drive module, When the power of the electric drive module is lower than the electric drive power threshold, the refrigerant is controlled not to flow through the first evaporator and / or the lubricating oil is controlled not to flow through the first evaporator. When the power of the electric drive module is higher than the electric drive power threshold, controlling the refrigerant and the lubricating oil to flow through the first evaporator to perform heat exchange in the first evaporator; and / or, Detect ambient temperature or passenger compartment temperature, When the ambient temperature is lower than the ambient temperature threshold, or when the passenger compartment temperature is lower than the passenger compartment temperature threshold, The refrigerant and the lubricating oil are controlled to flow through the first evaporator to perform heat exchange in the first evaporator.

10. A vehicle having a thermal management system according to any one of claims 1 to 6.

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