Thermal Management System

Abstract

The present application provides a thermal management system, including a refrigerant circuit and a water circuit. The refrigerant circuit includes a compressor, a water-cooled condenser, a first electronic expansion valve, a first four-way valve, an external heat exchanger, a second electronic expansion valve, a heat exchanger, a gas-liquid separator, and a third electronic expansion valve, and multiple components form corresponding circuits according to the requirements of different thermal management modes. The water circuit includes a motor electronic control, a first water pump, a second four-way valve, a third four-way valve, a first three-way valve, a radiator, a water-cooled condenser, a second three-way valve, a second water pump, a heat exchanger, a third water pump, a fourth water pump, a third three-way valve, and a battery, and multiple components form corresponding circuits according to the requirements of different thermal management modes. Different passages of the four-way valve are set to realize simple switching between cooling and heating modes, and a heat exchanger is used as an evaporator to absorb heat for defrosting and defoggering, which solves the problem of high energy consumption, and there is no problem of heat exchange coupling, so that the heating capacity of the passenger compartment can be adjusted.

Description

Technical Field

[0001] The present application relates to the field of vehicle thermal management technology, and in particular to a thermal management system. Background Art

[0002] At present, the thermal comfort and heating function of new energy vehicles are a bigger problem compared to traditional fuel vehicles. Most of the current industry uses heat pump systems and PTC (Positive Temperature Coefficient) heaters to solve this problem.

[0003] However, the thermal management system using heat pump system and PTC heater still has some defects. For example, the current heat pump system is complicated to switch between cooling and heating for the passenger compartment, and the compressor needs to stop working. The functional requirements can only be achieved by adjusting the on-off valve and different electronic expansion valves. For another example, after the current heat pump system has been working in a low temperature and high humidity environment for a period of time, the outdoor evaporator surface is prone to frost, resulting in a decrease in the ventilation and heat absorption capacity of the outdoor evaporator, which in turn leads to a worse heating effect in the passenger compartment. Therefore, at this time, high-temperature refrigerant is usually required to enter the external evaporator to remove the frost on the surface, but during the defrosting period, the heating of the passenger compartment needs to be achieved by using a PTC heater. However, since the heating efficiency of the PTC heater is less than 1, the activation of the PTC heater will increase the energy consumption of the entire vehicle and affect the cruising range. In addition, if the heat pump system adopts direct type during defrosting or defog, the evaporator is used for cooling and dehumidification, and the internal condenser heats the cooled air to be output to the passenger compartment. However, since the refrigerant circuit is a closed loop formed by the compressor, internal condenser, evaporator and gas-liquid separator, there is a phenomenon of heat exchange coupling between the internal condenser and the evaporator, and the air temperature output to the passenger compartment cannot meet any temperature requirements. For another example, when the current heat pump system has a rear air conditioning main unit, it usually adopts the method of evaporator cooling and PTC heater heating, which makes the components more and the structure more complicated, resulting in high cost.

[0004] It can be seen that a thermal management system is urgently needed to overcome the above-mentioned defects of the thermal management systems in the prior art. Summary of the invention

[0005] The present application provides a thermal management system to solve the technical problems of the existing thermal management system, such as the complex switching between heating and cooling, high energy consumption of the whole vehicle caused by defrosting and defogger, inability to meet any air temperature requirements of the passenger compartment, and complex structure of the rear air-conditioning main unit.

[0006] In a first aspect, the present application provides a thermal management system, comprising: a refrigerant circuit and / or a water circuit, wherein the refrigerant circuit has a liquid refrigerant, and the water circuit has a coolant;

[0007] The refrigerant circuit includes a compressor, a water-cooled condenser, a first electronic expansion valve, a first four-way valve, an external heat exchanger, a second electronic expansion valve, a heat exchanger, a gas-liquid separator, and a third electronic expansion valve, and multiple components thereof form corresponding circuits according to the requirements of different thermal management modes;

[0008] The water circuit includes a motor electronic control, a first water pump, a second four-way valve, a third four-way valve, a first three-way valve, a radiator, the water-cooled condenser, a second three-way valve, a second water pump, the heat exchanger, a third water pump, a fourth water pump, a third three-way valve, and multiple components in the battery to form corresponding circuits according to the requirements of the different thermal management modes.

[0009] In a possible design, the refrigerant circuit includes a first refrigerant circuit, and / or a second refrigerant circuit, and / or a third refrigerant circuit, and / or a fourth refrigerant circuit;

[0010] The first refrigerant circuit includes the compressor, the water-cooled condenser, the first electronic expansion valve, the first passage of the first four-way valve, the external heat exchanger, the second electronic expansion valve, the heat exchanger, the second passage of the first four-way valve and the gas-liquid separator, which are connected in series to form a closed loop;

[0011] The second refrigerant circuit includes the compressor, the water-cooled condenser, the first electronic expansion valve, the first passage of the first four-way valve, the external heat exchanger, the third electronic expansion valve, the front air conditioner internal evaporator, the second passage of the first four-way valve and the gas-liquid separator connected in series to form a closed loop;

[0012] The third refrigerant circuit includes the compressor, the water-cooled condenser, the first electronic expansion valve, the third passage of the first four-way valve, the front air conditioner internal evaporator, the third electronic expansion valve, the external heat exchanger, the fourth passage of the first four-way valve and the gas-liquid separator, which are connected in series in sequence to form a closed loop;

[0013] The fourth refrigerant circuit includes the compressor, the water-cooled condenser, the first electronic expansion valve, the third passage of the first four-way valve, the front air conditioner internal evaporator, the second electronic expansion valve, the heat exchanger, the fourth passage of the first four-way valve and the gas-liquid separator, which are connected in series in sequence to form a closed loop;

[0014] Among them, the first port and the third port of the first four-way valve are connected to form a first passage of the first four-way valve, the second port and the fourth port of the first four-way valve are connected to form a second passage of the first four-way valve, the first port and the second port of the first four-way valve are connected to form a third passage of the first four-way valve, and the third port and the fourth port of the first four-way valve are connected to form a fourth passage of the first four-way valve.

[0015] In one possible design, the water circuit includes a first motor water circuit, and / or a second motor water circuit, and / or a third motor water circuit, and / or a fourth motor water circuit, and / or a fifth motor water circuit, a sixth motor water circuit, and / or a seventh motor water circuit;

[0016] The first motor water circuit comprises the motor electronic control, the first water pump, the first passage of the second four-way valve, the first passage of the third four-way valve and the first passage of the first three-way valve connected in series to form a closed loop;

[0017] The second motor water circuit comprises the motor electronic control, the first water pump, the first passage of the second four-way valve, the first passage of the third four-way valve, the second passage of the first three-way valve and the radiator connected in series to form a closed loop;

[0018] The third motor water circuit includes the motor electronic control, the first water pump, the first passage of the second four-way valve, the second water pump, the water-cooled condenser, the second passage of the second three-way valve, the first passage of the third four-way valve, the second passage of the first three-way valve and the radiator, which are connected in series to form a closed loop;

[0019] The fourth motor water circuit includes the motor electronic control, the first water pump, the second passage of the second four-way valve, the third water pump, the heat exchanger, the second passage of the third four-way valve and the first passage of the first three-way valve connected in series to form a closed loop;

[0020] The fifth motor water circuit includes the motor electronic control, the first water pump, the second passage of the second four-way valve, the third water pump, the heat exchanger, the second passage of the third four-way valve, the second passage of the first three-way valve and the radiator connected in series to form a closed loop;

[0021] The sixth motor water circuit includes the motor electronic control, the first water pump, the first passage of the second four-way valve, the third passage of the third four-way valve, the second passage of the third three-way valve, the fourth water pump, the battery, the third passage of the second four-way valve, the third water pump, the heat exchanger, the second passage of the third four-way valve and the first passage of the first three-way valve connected in series in sequence to form a closed loop;

[0022] The seventh motor water circuit includes the motor electronic control, the first water pump, the first passage of the second four-way valve, the second water pump, the water-cooled condenser, the second passage of the second three-way valve, the first passage of the third four-way valve and the first passage of the first three-way valve connected in series to form a closed loop;

[0023] Among them, the first port and the second port of the second four-way valve are connected to form a first passage of the second four-way valve, the first port and the second port of the third four-way valve are connected to form a first passage of the third four-way valve, the first port and the second port of the first three-way valve are connected to form a first passage of the first three-way valve, the first port and the third port of the first three-way valve are connected to form a second passage of the first three-way valve, the first port and the third port of the second three-way valve are connected to form a second passage of the second three-way valve, the first port and the third port of the second four-way valve form a second passage of the second four-way valve, the second port and the fourth port of the third four-way valve form a second passage of the third four-way valve, the first port and the third port of the third four-way valve form a third passage of the third four-way valve, the first port and the third port of the third three-way valve form a second passage of the third three-way valve, and the third port and the fourth port of the second four-way valve form a third passage of the second four-way valve.

[0024] In one possible design, the water circuit includes a first battery water circuit, and / or a second battery water circuit, and / or a third battery water circuit;

[0025] The first battery water circuit includes the third water pump, the heat exchanger, the fourth passage of the third four-way valve, the second passage of the third three-way valve, the fourth water pump, the battery and the third passage of the second four-way valve connected in series in sequence to form a closed loop;

[0026] The second battery water circuit includes the fourth water pump, the battery, the fourth passage of the second four-way valve, the second water pump, the water-cooled condenser, the second passage of the second three-way valve, the third passage of the third four-way valve and the second passage of the third three-way valve connected in series in sequence to form a closed loop;

[0027] The third battery water circuit includes the fourth water pump, the battery, the fourth passage of the second four-way valve, the second water pump, the PTC heater, the second passage of the second three-way valve, the third passage of the third four-way valve and the second passage of the third three-way valve connected in series to form a closed loop;

[0028] The third port and the fourth port of the third four-way valve form a fourth passage of the third four-way valve, and the second port and the fourth port of the second four-way valve form a fourth passage of the second four-way valve.

[0029] In a possible design, the water circuit further includes a first rear air conditioning water circuit and / or a second rear air conditioning water circuit;

[0030] The first rear air-conditioning water circuit includes the third water pump, the heat exchanger, the fourth passage of the third four-way valve, the rear air-conditioning internal heat exchanger and the third passage of the second four-way valve connected in series in sequence to form a closed loop;

[0031] The second rear air-conditioning water circuit includes the third water pump, the heat exchanger, the fourth passage of the third four-way valve, the second passage of the third three-way valve, the fourth water pump, the battery and the third passage of the second four-way valve, which are connected in series in sequence to form a closed loop.

[0032] In a possible design, the water circuit further includes a first warm air water circuit, and / or a second warm air water circuit, and / or a third warm air water circuit;

[0033] The first warm air water circuit includes the second water pump, the PTC heater, the first passage of the second three-way valve and the front air conditioner internal heat exchanger connected in series to form a closed loop;

[0034] The second warm air water circuit includes the second water pump, the PTC heater, the second passage of the second three-way valve, the third passage of the third four-way valve, the rear air conditioner internal heat exchanger and the fourth passage of the second four-way valve connected in series in sequence to form a closed loop;

[0035] The third warm air water circuit includes the second water pump, the PTC heater, the second passage of the second three-way valve, the third passage of the third four-way valve, the second passage of the third three-way valve, the fourth water pump, the battery and the fourth passage of the second four-way valve, which are connected in series in sequence to form a closed loop.

[0036] In one possible design, the different thermal management modes include a first thermal management mode, in which a first motor water circuit in the water circuits is enabled;

[0037] In the first thermal management mode, the first motor water circuit is used to store heat for the motor in the motor electronic control.

[0038] In one possible design, the different thermal management modes include a second thermal management mode, in which a second motor water circuit in the water circuit is enabled;

[0039] In the second thermal management mode, the second motor water circuit is used to cool the motor through the radiator.

[0040] In a possible design, the different thermal management modes include a third thermal management mode, in which the first refrigerant circuit in the refrigerant circuit is enabled, and the third motor water circuit and the first battery water circuit in the water circuit are enabled;

[0041] In the third thermal management mode, the first refrigerant circuit is used to provide a cold source for the battery through the heat exchanger, the third motor water circuit is used to release the heat of the motor and the first refrigerant circuit to the environment through the radiator, and the first battery water circuit is used to provide the coolant cooled by the heat exchanger to the battery for cooling.

[0042] In one possible design, the different thermal management modes include a fourth thermal management mode, in which the first refrigerant circuit in the refrigerant circuits is enabled, and the fourth motor water circuit and the second battery water circuit in the water circuits are enabled;

[0043] In the fourth thermal management mode, the first refrigerant circuit is used to provide a heat source for the battery through the water-cooled condenser, the second battery water circuit is used to provide the heat provided by the water-cooled condenser to the battery for heating, and the fourth motor water circuit is used to provide the waste heat of the motor to the heat exchanger for heat absorption.

[0044] In one possible design, the different thermal management modes include a fifth thermal management mode, in which a first refrigerant circuit in the refrigerant circuits is enabled, and a fifth motor water circuit and a second battery water circuit in the water circuits are enabled;

[0045] In the fifth thermal management mode, the first refrigerant circuit is used to provide a heat source for the battery through the water-cooled condenser, the second battery water circuit is used to provide the heat provided by the water-cooled condenser to the battery for heating, and the fifth motor water circuit is used to absorb ambient heat through the radiator and provide it to the first refrigerant circuit for absorption through the heat exchanger.

[0046] In one possible design, the different thermal management modes include a sixth thermal management mode, in which a sixth motor water circuit in the water circuits is enabled;

[0047] In the sixth thermal management mode, the sixth motor water circuit is used to recover the heat of the motor and use the recovered heat to heat the battery.

[0048] In one possible design, the different thermal management modes include a seventh thermal management mode, in which a fourth motor water circuit and a third battery water circuit in the water circuits are enabled;

[0049] In the seventh thermal management mode, the third battery water circuit is used to provide the heat generated by the PTC heater to the battery to increase the temperature, and the fourth motor water circuit is used to store the heat of the motor to store heat.

[0050] In a possible design, the different thermal management modes include an eighth thermal management mode, in which the first refrigerant circuit and the second refrigerant circuit in the refrigerant circuit are enabled, and the third motor water circuit and the first rear air conditioning water circuit in the water circuit are enabled;

[0051] In the eighth thermal management mode, the first refrigerant circuit and the second refrigerant circuit are used to provide a cold source for the passenger compartment through the heat exchanger and the front air-conditioning internal evaporator respectively, the first rear air-conditioning water circuit is used to provide the coolant cooled by the heat exchanger to the rear air-conditioning internal heat exchanger for heat exchange to cool the passenger compartment, the third motor water circuit is used to release the heat of the motor and the first refrigerant circuit and the second refrigerant circuit to the environment through the radiator, and the battery is self-circulating.

[0052] In a possible design, the different thermal management modes include a ninth thermal management mode, in which the first refrigerant circuit and the second refrigerant circuit in the refrigerant circuit are enabled, and the third motor water circuit, the first rear air-conditioning water circuit, and the second air-conditioning water circuit in the water circuit are enabled;

[0053] In the ninth management mode, the second refrigerant circuit and the third refrigerant circuit are used to provide a cold source for the passenger compartment and the battery through the heat exchanger and the front air-conditioning internal evaporator respectively, the first rear air-conditioning water circuit and the second rear air-conditioning water circuit are used to provide the coolant cooled by the heat exchanger to the rear air-conditioning internal heat exchanger and the battery respectively for heat exchange to cool the passenger compartment and the battery, and the third motor water circuit is used to release the heat of the motor and the first refrigerant circuit and the second refrigerant circuit to the environment through the radiator.

[0054] In a possible design, the different thermal management modes include a tenth thermal management mode, in which the third refrigerant circuit and the fourth refrigerant circuit in the refrigerant circuit are enabled, and the seventh motor water circuit and the first rear air conditioning water circuit in the water circuit are enabled;

[0055] In the tenth thermal management mode, the third refrigerant circuit and the fourth refrigerant circuit are used to provide a heat source for the passenger compartment through the external heat exchanger and the heat exchanger respectively, the first rear air-conditioning water circuit is used to provide the heat provided by the heat exchanger to the passenger compartment for heating, and the seventh motor water circuit is used to recover the waste heat of the motor.

[0056] In a possible design, the different thermal management modes include an eleventh thermal management mode, in which the third refrigerant circuit and the fourth refrigerant circuit in the refrigerant circuit are enabled, and the fifth motor water circuit and the first rear air conditioning water circuit in the water circuit are enabled;

[0057] In the eleventh thermal management mode, the third refrigerant circuit and the fourth refrigerant circuit are used to provide heat sources for the passenger compartment through the external heat exchanger and the heat exchanger respectively, the first rear air-conditioning water circuit is used to provide the heat provided by the heat exchanger to the passenger compartment for heating, and the fifth motor water circuit is used to absorb ambient heat through the radiator and provide it to the third refrigerant circuit and the fourth refrigerant circuit for absorption through the heat exchanger.

[0058] In a possible design, the different thermal management modes include a twelfth thermal management mode, in which the fourth refrigerant circuit in the refrigerant circuits is enabled, and the fifth motor water circuit and the first rear air conditioning water circuit in the water circuits are enabled;

[0059] In the twelfth thermal management mode, the fourth refrigerant circuit is used to provide a heat source for the passenger compartment through the heat exchanger, the first rear air-conditioning water circuit is used to provide the heat provided by the heat exchanger to the passenger compartment for heating, and the fifth motor water circuit is used to absorb ambient heat through the radiator and provide it to the fourth refrigerant circuit for absorption through the heat exchanger.

[0060] In a possible design, the different thermal management modes include a thirteenth thermal management mode, in which the first warm air water circuit and the fourth motor water circuit in the water circuits are enabled;

[0061] In the thirteenth thermal management mode, the first warm air water circuit is used to heat the passenger compartment through the PTC heater, the fourth motor water circuit is used to store the heat of the motor to store heat, and the battery is self-insulated.

[0062] In a possible design, the different thermal management modes include a fourteenth thermal management mode, in which the first warm air water circuit, the second warm air water circuit, the third warm air water circuit, and the fourth motor water circuit in the water circuits are enabled;

[0063] In the fourteenth thermal management mode, the first warm air water circuit, the second warm air water circuit, and the third warm air water circuit are simultaneously used to heat the passenger compartment and the battery through the PTC heater, and the fourth motor water circuit is used to store the heat of the motor to store heat.

[0064] In a possible design, the different thermal management modes include a fifteenth thermal management mode, in which the third refrigerant circuit and the fourth refrigerant circuit in the refrigerant circuit are enabled, and the fourth warm air water circuit, the fifth warm air water circuit, the sixth warm air water circuit and the fourth motor water circuit in the water circuit are enabled;

[0065] In the fifteenth thermal management mode, the third refrigerant circuit and the fourth refrigerant circuit are used to provide heat sources for the passenger compartment and the battery through the external heat exchanger and the heat exchanger respectively, the fourth warm air water circuit, the fifth warm air water circuit and the sixth warm air water circuit are simultaneously used to heat the passenger compartment and the battery through heat exchange through the water-cooled condenser, and the fourth motor water circuit is used to store the heat of the motor to accumulate heat.

[0066] In a possible design, the different thermal management modes include a sixteenth thermal management mode, in which the first refrigerant circuit among the refrigerant circuits is enabled, and the seventh motor water circuit and the first rear air conditioning water circuit among the water circuits are enabled;

[0067] In the sixteenth thermal management mode, the first refrigerant circuit is used to provide a heat source through the water-cooled condenser, the first rear air-conditioning water circuit is used to provide the heat provided by the water-cooled condenser to heat the external heat exchanger for de-icing, and the seventh motor water circuit is used to recover the waste heat of the motor.

[0068] The present application provides a thermal management system, including a refrigerant circuit and a water circuit, wherein the refrigerant circuit has a liquid refrigerant, and the water circuit is provided with a coolant. The refrigerant circuit includes a compressor, a water-cooled condenser, a first electronic expansion valve, a first four-way valve, an external heat exchanger, a second electronic expansion valve, a heat exchanger, a gas-liquid separator, and a third electronic expansion valve, and multiple components form corresponding circuits according to the requirements of different thermal management modes. The water circuit includes a motor electronic control, a first water pump, a second four-way valve, a third four-way valve, a first three-way valve, a radiator, a water-cooled condenser, a second three-way valve, a second water pump, a heat exchanger, a third water pump, a fourth water pump, a third three-way valve, and a battery, and multiple components form corresponding circuits according to the requirements of different thermal management modes. The four-way valve realizes a simple switching between cooling and heating modes through different passages, uses a heat exchanger as an evaporator to absorb heat for defrosting and defoggering, reduces the application of PTC heater supplementary heat to solve the problem of high energy consumption, and does not have the problem of heat exchange coupling, so that the passenger compartment supplementary heat capacity is adjustable. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0070] Figure 1 A schematic diagram of the structure of a thermal management system provided in an embodiment of the present application;

[0071] Figure 2 A schematic diagram of the structure of another thermal management system provided in an embodiment of the present application;

[0072] Figure 3 A schematic diagram of the structure of another thermal management system provided in an embodiment of the present application;

[0073] Figure 4 A schematic diagram of the structure of another thermal management system provided in an embodiment of the present application;

[0074] Figure 5 A schematic diagram of the structure of another thermal management system provided in an embodiment of the present application;

[0075] Figure 6 A schematic diagram of the structure of another thermal management system provided in an embodiment of the present application;

[0076] Figure 7 A schematic diagram of the structure of another thermal management system provided in an embodiment of the present application;

[0077] Figure 8A schematic diagram of the structure of another thermal management system provided in an embodiment of the present application;

[0078] Fig. 9 A schematic diagram of the structure of another thermal management system provided in an embodiment of the present application;

[0079] Fig.10 A schematic diagram of the structure of another thermal management system provided in an embodiment of the present application;

[0080] Fig.11 A schematic diagram of the structure of another thermal management system provided in an embodiment of the present application;

[0081] Fig.12 A schematic diagram of the structure of another thermal management system provided in an embodiment of the present application;

[0082] Fig.13 A schematic diagram of the structure of another thermal management system provided in an embodiment of the present application;

[0083] Fig.14 A schematic diagram of the structure of another thermal management system provided in an embodiment of the present application;

[0084] Fig.15 A schematic diagram of the structure of another thermal management system provided in an embodiment of the present application;

[0085] Fig.16 A schematic diagram of the structure of another thermal management system provided in an embodiment of the present application;

[0086] Fig.17 A schematic diagram of the structure of another thermal management system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0087] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of methods and devices consistent with some aspects of the present application as detailed in the appended claims.

[0088] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0089] At present, most of the heat pump systems and PTC heaters are used to achieve the thermal comfort and heating functions of new energy vehicles. However, this thermal management system still has some defects. For example, the current heat pump system is complicated to switch between cooling and heating for the passenger compartment, and the compressor needs to stop working. The functional requirements can only be achieved by adjusting the on-off valve and different electronic expansion valves. For another example, after the current heat pump system has been working in a low temperature and high humidity environment for a period of time, the outdoor evaporator surface is prone to frost, resulting in a decrease in the ventilation and heat absorption capacity of the outdoor evaporator, which in turn leads to a worse heating effect in the passenger compartment. Therefore, at this time, high-temperature refrigerant is usually required to enter the external evaporator to remove the frost on the surface, but during the defrosting period, the heating of the passenger compartment needs to be achieved by using a PTC heater, but because the heating efficiency of the PTC heater is less than 1, the start-up of the PTC heater will increase the energy consumption of the entire vehicle and affect the cruising range. In addition, if the heat pump system adopts direct type during defrosting or defog, the evaporator is used for cooling and dehumidification, and the internal condenser heats the cooled air to be output to the passenger compartment. However, since the refrigerant circuit is a closed loop formed by the compressor, internal condenser, evaporator and gas-liquid separator, there is a phenomenon of heat exchange coupling between the internal condenser and the evaporator, and the air temperature output to the passenger compartment cannot meet any temperature requirements. For another example, when the current heat pump system has a rear air conditioning main unit, it usually adopts the method of evaporator cooling and PTC heater heating, which makes the components more and the structure more complicated, resulting in high cost.

[0090] In view of the above problems existing in the prior art, the present application provides a thermal management system. The inventive concept of the thermal management system provided in the present application is that the components in the refrigerant circuit and the water circuit can form corresponding circuits according to the requirements of different thermal management modes, and corresponding four-way valves are arranged in the refrigerant circuit and the water circuit, so that the refrigerant circuit and the water circuit can be easily switched between cooling and heating modes under different thermal management modes through different passages of the corresponding four-way valves. In addition, a heat exchanger is used as an evaporator to absorb heat for defrosting and defoggering, and then a water-cooled condenser is used to provide a heat source for the passenger compartment, reducing the application of PTC heater supplementary heat to solve the problem of high energy consumption, and there is no problem of heat exchange coupling, so that the supplementary heat capacity of the passenger compartment is adjustable.

[0091] Figure 1 This is a schematic diagram of a thermal management system provided in an embodiment of the present application. Figure 1 As shown, the thermal management system provided in the embodiment of the present application includes: a refrigerant circuit and / or a water circuit, the refrigerant circuit contains liquid refrigerant, and the water circuit contains coolant.

[0092] The first end of the compressor 11 is connected to the first end of the water-cooled condenser 12, the second end of the water-cooled condenser 12 is connected to the first end of the first four-way valve 13, the third end of the first four-way valve 13 is connected to the first end of the external heat exchanger 14, the second end of the external heat exchanger 14 is connected to the first end of the coaxial tube 15, the second end of the coaxial tube 15 is connected to the first end of the heat exchanger 16 and the second end of the gas-liquid separator 17 respectively, the first end of the gas-liquid separator 17 is connected to the fourth end of the coaxial tube 15, the third gate of the coaxial tube 15 is connected to the second end of the compressor 11, and the second end of the heat exchanger 16 is also connected to the second end of the coaxial tube 15.

[0093] A first electronic expansion valve 18 is connected between the water-cooled condenser 12 and the first four-way valve 13 , and a second electronic expansion valve 19 is connected between the heat exchanger 16 and the second port of the coaxial tube 15 .

[0094] Optionally, the second port of the first four-way valve 13 is communicated with the first port of the front air-conditioner internal evaporator 20 , and the second port of the front air-conditioner internal evaporator 20 is communicated with the second electronic expansion valve 19 .

[0095] Optionally, the second port of the evaporator 20 inside the front air conditioner is communicated with the second port of the coaxial tube 15 via the third electronic expansion valve 21 .

[0096] Optionally, a high-pressure filling port 22 may be provided at the second end of the coaxial tube 15 , and a low-pressure filling port 23 may be provided at the second end of the gas-liquid separator 17 .

[0097] Optionally, a first refrigerant one-way valve 24 and a second refrigerant one-way valve 25 may be arranged in parallel between the third electronic expansion valve 21 and the second electronic expansion valve 19. The conduction direction of the first refrigerant one-way valve 24 and the second refrigerant one-way valve 25 is from the third electronic expansion valve 21 and the second electronic expansion valve 19. A third refrigerant one-way valve 26 is also arranged between the second passage of the first four-way valve 13 and the gas-liquid separator 17, and its conduction direction is from the second passage of the first four-way valve 13 to the gas-liquid separator 17.

[0098] Optionally, a thermometer (such as Figure 1 T and PT in it).

[0099] Optionally, the refrigerant circuit may further include a blower 27 for supplying air to the front air conditioner internal evaporator 20 .

[0100] Among them, in different thermal management modes, by controlling different passages of the first four-way valve 13, the components in the above-mentioned refrigerant circuit can form different circuits to meet the requirements of the corresponding thermal management mode. For example, the refrigerant circuit can include a first refrigerant circuit, and / or a second refrigerant circuit, and / or a third refrigerant circuit, and / or a fourth refrigerant circuit.

[0101] Continue to refer to Figure 1 As shown, in the water circuit, the first end of the motor electronic control 31 is communicated with the first end of the first water pump 32, the second end of the first water pump 32 is communicated with the first port of the second four-way valve 33, the second port of the second four-way valve 33 is communicated with the first end of the third water pump 34, the second end of the third water pump 34 is communicated with the third end of the water-cooled condenser 12, the fourth end of the water-cooled condenser 12 is communicated with the first port of the second three-way valve 35, the third port of the second three-way valve 35 is communicated with the first port of the third four-way valve 36, the third port of the third four-way valve 36 is communicated with the first port of the third three-way valve 37 and the first end of the rear air-conditioning internal heat exchanger 38 respectively, the second end of the rear air-conditioning internal heat exchanger 38 is communicated with the fourth port of the second four-way valve 33, the third port of the third three-way valve 37 is communicated with the first end of the fourth water pump 39, the second end of the fourth water pump 39 is communicated with the first end of the battery 40, and the second end of the battery 40 and the second port of the third three-way valve 37 are both connected to the fourth port of the second four-way valve 33.

[0102] The second port of the third four-way valve 36 is in communication with the first port of the first three-way valve 41, the third port of the first three-way valve 41 is in communication with the first end of the radiator 42, the second port of the first three-way valve 41 is in communication with the second end of the radiator 42, and the second end of the radiator 42 is in communication with the second end of the motor electronic control 31. The fourth port of the third four-way valve 36 is in communication with the third end of the heat exchanger 16.

[0103] The third port of the second four-way valve 33 is communicated with a first end of the third water pump 43 , and the second end of the third water pump 43 is communicated with a fourth end of the heat exchanger 16 .

[0104] In addition, the second port of the second three-way valve 35 is communicated with the first end of the front air conditioner internal heat exchanger 44 , and the second end of the front air conditioner internal heat exchanger 44 is communicated with the first end of the second water pump 34 .

[0105] Optionally, a water tank 45 is connected in series to the first end of the motor electronic control 31 , and the ambient heat or the waste heat of the motor is selectively absorbed by the water temperature in the water tank 45 .

[0106] Optionally, the motor electronic control 31 is a device composed of a front motor 311, a rear motor 312, a front motor controller 313 and a rear motor controller 314, wherein the front motor 311 and the front motor controller 313 are connected in series, the rear motor 312 and the rear motor controller 314 are connected in series, the first end of the front motor 311 is connected to the first end of the rear motor 312 to serve as the first end of the motor electronic control 31, and the second end of the front motor controller 313 is connected to the second end of the rear motor controller 314 to serve as the second end of the motor electronic control 31.

[0107] Optionally, a waterway check valve 46 may be connected between the second port of the second four-way valve 33 and the third port of the second three-way valve 35 , and the waterway check valve 46 may be connected from the second port of the second four-way valve 33 to the third port of the second three-way valve 35 .

[0108] Optionally, a PTC heater 47 may be connected between the fourth end of the water-cooled condenser 12 and the second three-way valve 35. The PTC heater may be a HVH.

[0109] Optionally, a thermometer (such as a thermometer) may be provided at both ends of the battery 40 and at the first port of the second four-way valve 33. Figure 1 (denoted by T in the middle).

[0110] Optionally, the water circuit may further include a fan 48 for accelerating the heat dissipation effect of the radiator 42 .

[0111] Among them, under different thermal management modes, by controlling different passages of the second four-way valve 33, the third four-way valve 36 and the first three-way valve 41, the second three-way valve 35 and the third three-way valve 37, the components in the above-mentioned water circuit can form corresponding circuits according to the requirements of different thermal management modes.

[0112] For example, the water circuit may include a first motor water circuit, and / or a second motor water circuit, and / or a third motor water circuit, and / or a fourth motor water circuit, and / or a fifth motor water circuit, and / or a sixth motor water circuit, and / or a seventh motor water circuit. The water circuit may include a first battery water circuit, and / or a second battery water circuit, and / or a third battery water circuit. The water circuit may also include a first rear air conditioning water circuit and / or a second rear air conditioning water circuit, and the water circuit may also include a first warm air water circuit, and / or a second warm air water circuit, and / or a third warm air water circuit.

[0113] It is understandable that, under different thermal management modes, each circuit in the refrigerant circuit and the water circuit can be enabled independently or jointly to meet the requirements of different thermal management modes.

[0114] Optionally, the thermal management system provided in the embodiment of the present application can be applied to R134a and CO 2 As a corresponding system for refrigerant.

[0115] Figure 2 This is a schematic diagram of another thermal management system provided in an embodiment of the present application. Figure 2 As shown, the thermal management system provided in the embodiment of the present application is used for a first thermal management mode among different thermal management modes, and enabling the first motor water circuit in the water circuit can meet the requirements of the first thermal management mode.

[0116] For example, the requirements of the first thermal management mode are: the motors (including the front motor 311 and the rear motor 312 ) store heat, the battery 40 circulates itself, and there is no demand for the passenger cabin.

[0117] like Figure 2 As shown, the first motor water circuit is a closed loop formed by connecting the motor electronic control 31, the first water pump 32, the first passage of the second four-way valve 33, the first passage of the third four-way valve 36 and the first passage of the first three-way valve 41 in series. Figure 2 The direction of the arrow in indicates the flow direction of the coolant in the first motor water circuit.

[0118] Among them, the first port and the second port of the second four-way valve 33 are connected to form the first passage of the second four-way valve 33, the first port and the second port of the third four-way valve 36 are connected to form the first passage of the third four-way valve 33, and the first port and the second port of the first three-way valve 41 are connected to form the first passage of the first three-way valve 41.

[0119] In the first thermal management mode, the first motor water circuit is used to store heat for the motor in the motor electronic control 31. At this time, the battery 40 can be self-circulating or self-insulating. Generally, the first thermal management mode is used in a scenario where the ambient temperature is low and the temperature of the motor is not high. The first motor water circuit in the water circuit provided in the embodiment of the present application can realize motor heat storage for heat recovery by the whole vehicle.

[0120] Figure 3 This is a schematic diagram of the structure of another thermal management system provided in the embodiment of the present application. Figure 3 As shown, the thermal management system provided in the embodiment of the present application is used for the second thermal management mode among different thermal management modes, and enabling the second motor water circuit in the water circuit can meet the requirements of the second thermal management mode.

[0121] For example, the requirements of the second thermal management mode are: cooling of the motors (including the front motor 311 and the rear motor 312 ), self-circulation of the battery 40 , and no requirements for the passenger cabin.

[0122] like Figure 3 As shown, the second motor water circuit is a closed loop formed by connecting the motor electronic control 31, the first water pump 32, the first passage of the second four-way valve 33, the first passage of the third four-way valve 36, the second passage of the first three-way valve 41 and the radiator 42 in series in sequence. Figure 3 The direction of the arrow in indicates the flow direction of the coolant in the second motor water circuit.

[0123] In the second thermal management mode, the second motor water circuit is used to cool the motor through the radiator 42. At this time, the battery 40 can be self-circulating or self-insulated. Generally, the second thermal management mode is used in the scenario where the motor temperature exceeds a preset value and needs to be cooled by the radiator 42 to cool it down.

[0124] The first port and the third port of the first three-way valve 41 are connected to form a second passage of the first three-way valve 41 .

[0125] Figure 4 This is a schematic diagram of the structure of another thermal management system provided in the embodiment of the present application. Figure 4 As shown, the thermal management system provided in the embodiment of the present application is used for the third thermal management mode among different thermal management modes. Activating the first refrigerant circuit in the refrigerant circuit, and activating the third motor water circuit and the first battery water circuit in the water circuit can meet the requirements of the third thermal management mode.

[0126] For example, the requirements of the third thermal management mode are: cooling of the battery 40, heat dissipation of the motor, and no requirements for the passenger compartment.

[0127] like Figure 4As shown, the first refrigerant circuit is a closed loop formed by connecting the compressor 11, the water-cooled condenser 12, the first electronic expansion valve 18, the first passage of the first four-way valve 13, the external heat exchanger 14, the second electronic expansion valve 19, the heat exchanger 16, the second passage of the first four-way valve 13 and the gas-liquid separator 17 in series in sequence. Figure 4 The direction of the arrow in the intermediate refrigerant circuit indicates the flow direction of the liquid refrigerant in the first refrigerant circuit.

[0128] The first battery water circuit includes the third water pump 43, the heat exchanger 16, the fourth passage of the third four-way valve 36, the second passage of the third three-way valve 37, the fourth water pump 39, the battery 40 and the third passage of the second four-way valve 33, which are connected in series to form a closed loop.

[0129] The third motor water circuit includes a motor electronic control 31, a first water pump 32, a first passage of a second four-way valve 33, a second water pump 34, a water-cooled condenser 12, a second passage of a second three-way valve 35, a first passage of a third four-way valve 36, a second passage of a first three-way valve 41 and a radiator 42 which are connected in series in sequence to form a closed loop.

[0130] Figure 4 The direction of the arrows in the water circuit indicates the flow direction of the coolant in the first battery water circuit and the third motor water circuit.

[0131] In the third thermal management mode, the first refrigerant circuit is used to provide a cold source for the battery 40 through the heat exchanger 16, the third motor water circuit is used to release the heat of the motor and the first refrigerant circuit to the environment through the radiator 42, and the first battery water circuit is used to provide the coolant cooled by the heat exchanger 16 to the battery 40 for cooling.

[0132] The first port and the third port of the first four-way valve 13 are connected to form a first passage of the first four-way valve 13, and the second port and the fourth port of the first four-way valve 13 are connected to form a second passage of the first four-way valve 13. The third port and the fourth port of the third four-way valve 36 form a fourth passage of the third four-way valve 36. The first port and the third port of the third three-way valve 37 form a second passage of the third three-way valve 37. The third port and the fourth port of the second four-way valve 33 form a third passage of the second four-way valve 33.

[0133] Figure 5 This is a schematic diagram of the structure of another thermal management system provided in the embodiment of the present application. Figure 5 As shown, the thermal management system provided in the embodiment of the present application is used for the fourth thermal management mode among different thermal management modes. Activating the first refrigerant circuit in the refrigerant circuit, and activating the fourth motor water circuit and the second battery water circuit in the water circuit can meet the requirements of the fourth thermal management mode.

[0134] For example, the requirements of the fourth thermal management mode are: the heat pump heats the battery 40, the motor 31 recovers heat, and there is no demand for the passenger cabin.

[0135] like Figure 5 As shown, the first refrigerant circuit is a closed loop formed by connecting the compressor 11, the water-cooled condenser 12, the first electronic expansion valve 18, the first passage of the first four-way valve 13, the external heat exchanger 14, the second electronic expansion valve 19, the heat exchanger 16, the second passage of the first four-way valve 13 and the gas-liquid separator 17 in series in sequence. Figure 5 The direction of the arrow in the intermediate refrigerant circuit indicates the flow direction of the liquid refrigerant in the first refrigerant circuit.

[0136] The fourth motor water circuit is a closed loop formed by connecting the motor electronic control 31, the first water pump 32, the second passage of the second four-way valve 33, the third water pump 43, the heat exchanger 16, the second passage of the third four-way valve 36 and the first passage of the first three-way valve 41 in series.

[0137] The second battery water circuit is a closed loop formed by connecting in series the fourth water pump 39, the battery 40, the fourth passage of the second four-way valve 33, the second water pump 34, the water-cooled condenser 12, the second passage of the second three-way valve 35, the third passage of the third four-way valve 36 and the second passage of the third three-way valve 37.

[0138] Figure 5 The direction of the arrows in the water circuit indicates the flow direction of the coolant in the second battery water circuit and the fourth motor water circuit.

[0139] In the fourth thermal management mode, the first refrigerant circuit is used to provide a heat source for the battery 40 through the water-cooled condenser 12, the second battery water circuit is used to provide the heat provided by the water-cooled condenser 12 to the battery 40 for heating, and the fourth motor water circuit is used to provide the motor waste heat to the heat exchanger 16 for heat absorption to achieve heat recovery. In the fourth thermal management mode, the heat pump, such as the second water pump 34, releases heat to the water circuit to heat the battery 40, and the first refrigerant circuit can also obtain the recovered motor waste heat through the heat exchanger 16, thereby improving the efficiency of the heat pump.

[0140] The first port and the third port of the second four-way valve 33 form a second passage of the second four-way valve 33. The second port and the fourth port of the third four-way valve 36 form a second passage of the third four-way valve 36. The second port and the fourth port of the second four-way valve 33 form a fourth passage of the second four-way valve 33. The first port and the third port of the second three-way valve 35 are connected to form a second passage of the second three-way valve 35. The first port and the third port of the third four-way valve 36 form a third passage of the third four-way valve 36.

[0141] Figure 6This is a schematic diagram of the structure of another thermal management system provided in the embodiment of the present application. Figure 6 As shown, the thermal management system provided in the embodiment of the present application is used for the fifth thermal management mode among different thermal management modes. Activating the first refrigerant circuit in the refrigerant circuit, and activating the fifth motor water circuit and the second battery water circuit in the water circuit can meet the requirements of the fifth thermal management mode.

[0142] For example, the requirements of the fifth thermal management mode are: the heat pump heats the battery 40 , absorbs heat from the environment through the radiator 42 , and there is no requirement for the passenger cabin.

[0143] like Figure 6 As shown, the first refrigerant circuit is a closed loop formed by connecting the compressor 11, the water-cooled condenser 12, the first electronic expansion valve 18, the first passage of the first four-way valve 13, the external heat exchanger 14, the second electronic expansion valve 19, the heat exchanger 16, the second passage of the first four-way valve 13 and the gas-liquid separator 17 in series in sequence. Figure 6 The direction of the arrow in the intermediate refrigerant circuit indicates the flow direction of the liquid refrigerant in the first refrigerant circuit.

[0144] The fifth motor water circuit is a closed loop formed by connecting the motor electronic control 31, the first water pump 32, the second passage of the second four-way valve 33, the third water pump 43, the heat exchanger 16, the second passage of the third four-way valve 36, the second passage of the first three-way valve 41 and the radiator 42 in series in sequence.

[0145] The second battery water circuit is a closed loop formed by connecting in series the fourth water pump 39, the battery 40, the fourth passage of the second four-way valve 33, the second water pump 34, the water-cooled condenser 12, the second passage of the second three-way valve 35, the third passage of the third four-way valve 36 and the second passage of the third three-way valve 37.

[0146] Figure 6 The direction of the arrows in the water circuit indicates the flow direction of the coolant in the second battery water circuit and the fifth motor water circuit.

[0147] In the fifth thermal management mode, the first refrigerant circuit is used to provide a heat source for the battery 40 through the water-cooled condenser 12, the second battery water circuit is used to provide the heat provided by the water-cooled condenser 12 to the battery 40 for heating, and the fifth motor water circuit is used to absorb ambient heat through the radiator 42 and provide the absorbed heat to the first refrigerant circuit for absorption through the heat exchanger 16. The fifth thermal management mode usually occurs when the coolant temperature in the motor 31 is lower than the ambient temperature, so the ambient heat can be absorbed through the radiator 42 and then provided to the first refrigerant circuit as a heat source to improve the efficiency of the heat pump, i.e., the second water pump 34, in heating the battery 40.

[0148] Figure 7This is a schematic diagram of the structure of another thermal management system provided in the embodiment of the present application. Figure 7 As shown, the thermal management system provided in the embodiment of the present application is used for the sixth thermal management mode among the different thermal management modes, and enabling the sixth motor water circuit in the water circuit can meet the requirements of the sixth thermal management mode.

[0149] For example, the requirements of the sixth thermal management mode are: the motor heats the battery 40 and there is no requirement for the passenger compartment.

[0150] like Figure 7 As shown, the sixth motor water circuit is a closed loop formed by connecting the motor electronic control 31, the first water pump 32, the first passage of the second four-way valve 33, the third passage of the third four-way valve 36, the second passage of the third three-way valve 37, the fourth water pump 39, the battery 40, the third passage of the second four-way valve 33, the third water pump 43, the heat exchanger 16, the second passage of the third four-way valve 36 and the first passage of the first three-way valve 41 in series.

[0151] In the sixth thermal management mode, the first passage of the third three-way valve 37 is also in an on state, and the third three-way valve 37 can be proportionally adjusted to simultaneously open the first passage and the second passage of the third three-way valve 37 .

[0152] Figure 7 The direction of the arrow in the water circuit indicates the flow direction of the coolant in the water circuit of the sixth motor.

[0153] In the sixth thermal management mode, the sixth motor water circuit is used to recover motor heat, so as to use the recovered heat to heat the battery 40. This thermal management mode occurs when the ambient temperature is low, the battery 40 needs to be heated, and the temperature of the motor is relatively high.

[0154] Figure 8 This is a schematic diagram of the structure of another thermal management system provided in the embodiment of the present application. Figure 8 As shown, the thermal management system provided in the embodiment of the present application is used for the seventh thermal management mode among the different thermal management modes, and enabling the fourth motor water circuit and the third battery water circuit in the water circuit can meet the requirements of the seventh thermal management mode.

[0155] For example, the requirements of the seventh thermal management mode are: the PTC heater 47 heats the battery 40 , and there is no requirement for the passenger compartment.

[0156] like Figure 8 As shown, the fourth motor water circuit is a closed loop formed by connecting the motor electronic control 31, the first water pump 32, the second passage of the second four-way valve 33, the third water pump 43, the heat exchanger 16, the second passage of the third four-way valve 36 and the first passage of the first three-way valve 41 in series.

[0157] The third battery water circuit is a closed loop formed by connecting in series the fourth water pump 39, the battery 40, the fourth passage of the second four-way valve 33, the second water pump 34, the PTC heater 47, the second passage of the second three-way valve 35, the third passage of the third four-way valve 36 and the second passage of the third three-way valve 37.

[0158] In the seventh thermal management mode, the first passage of the third three-way valve 37 is also in an on state, and the third three-way valve 37 can be proportionally adjusted to simultaneously open the first passage and the second passage of the third three-way valve 37 .

[0159] Figure 8 The direction of the arrows in the water circuit indicates the flow direction of the coolant in the fourth motor water circuit and the third battery water circuit.

[0160] In the seventh thermal management mode, the third battery water circuit is used to provide the heat generated by the PTC heater 47 to the battery 40 for heating, and the fourth motor water circuit is used to store the motor heat for heat storage. The seventh thermal management mode usually occurs in the scenario where the ambient temperature is low and the PTC heater 47 is needed to heat the battery 40 and the whole vehicle is in a charging state. In this scenario, there are generally no passengers in the passenger compartment, so there is no demand for the passenger compartment. When charging in a low temperature environment, the increase in the temperature of the battery 40 is good for the charging efficiency. Therefore, in order to obtain better battery performance, the PTC heater 47 is used to heat the battery 40, so that the temperature of the battery 40 rises. At this time, the heat generated by the motor is relatively small, and heat can be stored for backup.

[0161] Fig. 9 This is a schematic diagram of the structure of another thermal management system provided in the embodiment of the present application. Fig. 9 As shown, the thermal management system provided in the embodiment of the present application is used for the eighth thermal management mode among different thermal management modes. Activating the first refrigerant circuit and the second refrigerant circuit in the refrigerant circuit, and activating the third motor water circuit and the first rear air-conditioning water circuit in the water circuit can meet the requirements of the eighth thermal management mode.

[0162] For example, the requirements of the eighth thermal management mode are: cooling of the passenger compartment, self-circulation of the battery 40, and heat dissipation of the motor.

[0163] like Fig. 9 As shown, the first refrigerant circuit includes a compressor 11, a water-cooled condenser 12, a first electronic expansion valve 18, a first passage of a first four-way valve 13, an external heat exchanger 14, a second electronic expansion valve 19, a heat exchanger 16, a second passage of the first four-way valve 13 and a gas-liquid separator 17 which are connected in series in sequence to form a closed loop.

[0164] The second refrigerant circuit is a closed loop formed by connecting the compressor 11, the water-cooled condenser 12, the first electronic expansion valve 18, the first passage of the first four-way valve 13, the external heat exchanger 14, the third electronic expansion valve 21, the front air-conditioning internal evaporator 20, the second passage of the first four-way valve 13 and the gas-liquid separator 17 in series in sequence.

[0165] The third motor water circuit is a closed loop formed by connecting the motor electronic control 31, the first water pump 32, the first passage of the second four-way valve 33, the second water pump 34, the water-cooled condenser 12, the second passage of the second three-way valve 35, the first passage of the third four-way valve 36, the second passage of the first three-way valve 41 and the radiator 42 in series in sequence.

[0166] The first rear air conditioning water circuit is a closed loop formed by connecting the third water pump 43, the heat exchanger 16, the fourth passage of the third four-way valve 36, the rear air conditioning internal heat exchanger 38 and the third passage of the second four-way valve 33 in series.

[0167] Fig. 9 The direction of the arrow in the intermediate refrigerant circuit indicates the flow direction of the liquid refrigerant in the first refrigerant circuit and the second refrigerant circuit, and the direction of the arrow in the water circuit indicates the flow direction of the coolant in the third motor water circuit and the first rear air conditioning water circuit.

[0168] In the eighth thermal management mode, the first refrigerant circuit and the second refrigerant circuit are used to provide a cold source for the passenger compartment through the heat exchanger 16 and the front air conditioner internal evaporator 20 respectively, the first rear air conditioner water circuit is used to provide the coolant cooled by the heat exchanger 16 to the rear air conditioner internal heat exchanger 38 for heat exchange to cool the passenger compartment, and the third motor water circuit is used to release the heat of the motor and the first refrigerant circuit and the second refrigerant circuit to the environment through the radiator 42. In this mode, the battery 40 is self-circulating. The eighth thermal management mode occurs in the scene where the ambient temperature is high and the light is strong, but only the passenger compartment needs to be cooled.

[0169] Fig.10 This is a schematic diagram of the structure of another thermal management system provided in the embodiment of the present application. Fig.10 As shown, the thermal management system provided in the embodiment of the present application is used for a ninth thermal management mode among different thermal management modes. Enabling the first refrigerant circuit and the second refrigerant circuit in the refrigerant circuit, and enabling the third motor water circuit, the first rear air-conditioning water circuit and the second rear air-conditioning water circuit in the water circuit can meet the requirements of the ninth thermal management mode.

[0170] For example, the requirements of the ninth thermal management mode are: cooling of the passenger compartment, cooling of the battery 40, and heat dissipation of the motor.

[0171] like Fig.10As shown, the first refrigerant circuit includes a compressor 11, a water-cooled condenser 12, a first electronic expansion valve 18, a first passage of a first four-way valve 13, an external heat exchanger 14, a second electronic expansion valve 19, a heat exchanger 16, a second passage of the first four-way valve 13 and a gas-liquid separator 17 which are connected in series in sequence to form a closed loop.

[0172] The second refrigerant circuit is a closed loop formed by connecting the compressor 11, the water-cooled condenser 12, the first electronic expansion valve 18, the first passage of the first four-way valve 13, the external heat exchanger 14, the third electronic expansion valve 21, the front air-conditioning internal evaporator 20, the second passage of the first four-way valve 13 and the gas-liquid separator 17 in series in sequence.

[0173] The third motor water circuit is a closed loop formed by connecting the motor electronic control 31, the first water pump 32, the first passage of the second four-way valve 33, the second water pump 34, the water-cooled condenser 12, the second passage of the second three-way valve 35, the first passage of the third four-way valve 36, the second passage of the first three-way valve 41 and the radiator 42 in series in sequence.

[0174] The first rear air conditioning water circuit is a closed loop formed by connecting the third water pump 43, the heat exchanger 16, the fourth passage of the third four-way valve 36, the rear air conditioning internal heat exchanger 38 and the third passage of the second four-way valve 33 in series.

[0175] The second rear air-conditioning water circuit includes the third water pump 43, the heat exchanger 16, the fourth passage of the third four-way valve 36, the second passage of the third three-way valve 37, the fourth water pump 39, the battery 40 and the third passage of the second four-way valve 33, which are connected in series in sequence to form a closed loop.

[0176] Fig.10 The direction of the arrow in the intermediate refrigerant circuit indicates the flow direction of the liquid refrigerant in the first refrigerant circuit and the second refrigerant circuit, and the direction of the arrow in the water circuit indicates the flow direction of the coolant in the third motor water circuit, the first rear air-conditioning water circuit and the second rear air-conditioning water circuit.

[0177] In the ninth thermal management mode, the first refrigerant circuit and the second refrigerant circuit are used to provide cold sources for the passenger compartment and the battery 40 through the heat exchanger 16 and the front air-conditioning internal evaporator 20 respectively, the first rear air-conditioning water circuit and the second rear air-conditioning water circuit are used to provide the coolant cooled by the heat exchanger 16 to the rear air-conditioning internal heat exchanger 38 and the battery 40 respectively for heat exchange to cool the passenger compartment and the battery 40, and the third motor water circuit is used to release the heat of the motor and the first refrigerant circuit and the second refrigerant circuit to the environment through the radiator 42. The ninth thermal management mode occurs in the scenario where the passenger compartment and the battery 40 have cooling requests at the same time when the battery 40 is fast-charged and there are people in the passenger compartment.

[0178] Fig.11This is a schematic diagram of the structure of another thermal management system provided in the embodiment of the present application. Fig.11 As shown, the thermal management system provided in the embodiment of the present application is used for the tenth thermal management mode among different thermal management modes. Activating the third refrigerant circuit and the fourth refrigerant circuit in the refrigerant circuit, and activating the seventh motor water circuit and the first rear air-conditioning water circuit in the water circuit can meet the requirements of the tenth thermal management mode.

[0179] For example, the requirements of the tenth thermal management mode are: the heat pump heats the passenger compartment, the motor waste heat is recovered, and the battery 40 is self-insulated.

[0180] like Fig.11 As shown, the third refrigerant circuit includes a compressor 11, a water-cooled condenser 12, a first electronic expansion valve 18, a third passage of the first four-way valve 13, an internal evaporator 20 of the front air conditioner, a third electronic expansion valve 21, an external heat exchanger 14, a fourth passage of the first four-way valve 13 and a gas-liquid separator 17 which are connected in series in sequence to form a closed loop.

[0181] The fourth refrigerant circuit includes a compressor 11, a water-cooled condenser 12, a first electronic expansion valve 18, a third passage of the first four-way valve 13, a front air-conditioning internal evaporator 20, a second electronic expansion valve 19, a heat exchanger 16, a fourth passage of the first four-way valve 13 and a gas-liquid separator 17, which are connected in series in sequence to form a closed loop.

[0182] The seventh motor water circuit includes a motor electronic control 31, a first water pump 32, a first passage of a second four-way valve 33, a second water pump 34, a water-cooled condenser 12, a second passage of a second three-way valve 35, a first passage of a third four-way valve 36 and a first passage of a first three-way valve 41, which are connected in series in sequence to form a closed loop.

[0183] The first rear air conditioning water circuit is a closed loop formed by connecting the third water pump 43, the heat exchanger 16, the fourth passage of the third four-way valve 36, the rear air conditioning internal heat exchanger 38 and the third passage of the second four-way valve 33 in series.

[0184] Fig.11 The direction of the arrow in the intermediate refrigerant circuit indicates the flow direction of the liquid refrigerant in the third refrigerant circuit and the fourth refrigerant circuit, and the direction of the arrow in the water circuit indicates the flow direction of the coolant in the seventh motor water circuit and the first rear air conditioning water circuit.

[0185] In the tenth thermal management mode, the third refrigerant circuit and the fourth refrigerant circuit are used to provide heat sources for the passenger compartment through the external heat exchanger 14 and the heat exchanger 16 respectively, the first rear air-conditioning water circuit is used to provide the heat provided by the heat exchanger 16 to warm the passenger compartment, and the seventh motor water circuit is used to recover the waste heat of the motor.

[0186] Fig.12This is a schematic diagram of the structure of another thermal management system provided in the embodiment of the present application. Fig.12 As shown, the thermal management system provided in the embodiment of the present application is used for the eleventh thermal management mode among different thermal management modes. Enabling the third refrigerant circuit and the fourth refrigerant circuit in the refrigerant circuit, and enabling the fifth motor water circuit and the first rear air-conditioning water circuit in the water circuit can meet the requirements of the eleventh thermal management mode.

[0187] For example, the requirements of the eleventh thermal management mode are: the heat pump heats the passenger compartment, the heat exchanger 16 absorbs heat from the environment through the radiator 42 and the external exchanger 14, and the battery 40 keeps itself warm.

[0188] like Fig.12 As shown, the third refrigerant circuit includes a compressor 11, a water-cooled condenser 12, a first electronic expansion valve 18, a third passage of the first four-way valve 13, an internal evaporator 20 of the front air conditioner, a third electronic expansion valve 21, an external heat exchanger 14, a fourth passage of the first four-way valve 13 and a gas-liquid separator 17 which are connected in series in sequence to form a closed loop.

[0189] The fourth refrigerant circuit includes a compressor 11, a water-cooled condenser 12, a first electronic expansion valve 18, a third passage of the first four-way valve 13, a front air-conditioning internal evaporator 20, a second electronic expansion valve 19, a heat exchanger 16, a fourth passage of the first four-way valve 13 and a gas-liquid separator 17, which are connected in series in sequence to form a closed loop.

[0190] The fifth motor water circuit is a closed loop formed by connecting the motor electronic control 31, the first water pump 32, the second passage of the second four-way valve 33, the third water pump 43, the heat exchanger 16, the second passage of the third four-way valve 36, the second passage of the first three-way valve 41 and the radiator 42 in series in sequence.

[0191] The first rear air conditioning water circuit is a closed loop formed by connecting the third water pump 43, the heat exchanger 16, the fourth passage of the third four-way valve 36, the rear air conditioning internal heat exchanger 38 and the third passage of the second four-way valve 33 in series.

[0192] The first port and the second port of the first four-way valve 33 are connected to form a third passage of the first four-way valve 33 , and the third port and the fourth port of the first four-way valve 33 are connected to form a fourth passage of the first four-way valve 33 .

[0193] Fig.12 The direction of the arrow in the intermediate refrigerant circuit indicates the flow direction of the liquid refrigerant in the third refrigerant circuit and the fourth refrigerant circuit, and the direction of the arrow in the water circuit indicates the flow direction of the coolant in the fifth motor water circuit and the first rear air conditioning water circuit.

[0194] In the eleventh thermal management mode, the third refrigerant circuit and the fourth refrigerant circuit are used to provide heat sources for the passenger compartment through the external heat exchanger 14 and the heat exchanger 16 respectively, the first rear air-conditioning water circuit is used to provide the heat provided by the heat exchanger 16 to the passenger compartment for heating, and the fifth motor water circuit is used to absorb ambient heat through the radiator 42 and provide it to the third refrigerant circuit and the fourth refrigerant circuit for absorption through the heat exchanger 16, so that the coolant in the motor absorbs ambient heat through the radiator 42 and the external heat exchanger 14.

[0195] Fig.13 This is a schematic diagram of the structure of another thermal management system provided in the embodiment of the present application. Fig.13 As shown, the thermal management system provided in the embodiment of the present application is used for the twelfth thermal management mode among different thermal management modes. Enabling the fourth refrigerant circuit in the refrigerant circuit, and enabling the fifth motor water circuit and the first rear air-conditioning water circuit in the water circuit can meet the requirements of the twelfth thermal management mode.

[0196] For example, the requirements of the twelfth thermal management mode are: the heat pump heats the passenger compartment, the heat exchanger 16 absorbs heat from the environment only through the radiator 42, and the battery 40 keeps itself warm.

[0197] like Fig.13 As shown, the fourth refrigerant circuit includes a compressor 11, a water-cooled condenser 12, a first electronic expansion valve 18, a third passage of the first four-way valve 13, an internal evaporator 20 of the front air conditioner, a second electronic expansion valve 19, a heat exchanger 16, a fourth passage of the first four-way valve 13 and a gas-liquid separator 17 which are connected in series in sequence to form a closed loop.

[0198] The fifth motor water circuit is a closed loop formed by connecting the motor electronic control 31, the first water pump 32, the second passage of the second four-way valve 33, the third water pump 43, the heat exchanger 16, the second passage of the third four-way valve 36, the second passage of the first three-way valve 41 and the radiator 42 in series in sequence.

[0199] The first rear air conditioning water circuit is a closed loop formed by connecting the third water pump 43, the heat exchanger 16, the fourth passage of the third four-way valve 36, the rear air conditioning internal heat exchanger 38 and the third passage of the second four-way valve 33 in series.

[0200] Fig.13 The direction of the arrow in the intermediate refrigerant circuit indicates the flow direction of the liquid refrigerant in the fourth refrigerant circuit, and the direction of the arrow in the water circuit indicates the flow direction of the coolant in the fifth motor water circuit and the first rear air conditioning water circuit.

[0201] In the twelfth thermal management mode, the fourth refrigerant circuit is used to provide a heat source for the passenger compartment through the heat exchanger 16, the first rear air-conditioning water circuit is used to provide the heat provided by the heat exchanger 16 to the passenger compartment for heating, and the fifth motor water circuit is used to absorb ambient heat through the radiator 42 and provide it to the fourth refrigerant circuit for absorption through the heat exchanger 16, so that the coolant in the motor absorbs ambient heat through the radiator 42.

[0202] Fig.14 This is a schematic diagram of the structure of another thermal management system provided in the embodiment of the present application. Fig.14 As shown, the thermal management system provided in the embodiment of the present application is used for the thirteenth thermal management mode among the different thermal management modes, and enabling the fourth motor water circuit and the first warm air water circuit in the water circuit can meet the requirements of the thirteenth thermal management mode.

[0203] For example, the requirements of the thirteenth thermal management mode are: the PTC heater 47 heats the passenger compartment, the motor stores heat, and the battery 40 keeps itself warm.

[0204] like Fig.14 As shown, the fourth motor water circuit is a closed loop formed by connecting the motor electronic control 31, the first water pump 32, the second passage of the second four-way valve 33, the third water pump 43, the heat exchanger 16, the second passage of the third four-way valve 36 and the first passage of the first three-way valve 41 in series.

[0205] The first warm air water circuit includes a second water pump 34, a PTC heater 47, a first passage of the second three-way valve 35, and a front air conditioner internal heat exchanger 44 which are connected in series in sequence to form a closed loop.

[0206] Fig.14 The direction of the arrow in the water circuit indicates the flow direction of the coolant in the fourth motor water circuit and the first heater water circuit.

[0207] In the thirteenth thermal management mode, the first warm air water circuit is used to heat the passenger compartment through the PTC heater 47, the fourth motor water circuit is used to store the motor heat for heat storage, and the battery is self-insulated. The thirteenth thermal management mode usually occurs in scenarios where the ambient temperature is low (for example, below -18°C) and the passenger compartment cannot be heated by the heat pump, and the passenger compartment has a stronger heating demand than the battery 40. Therefore, it is necessary to use the PTC heater 47 to heat the passenger compartment alone. After the temperature of the passenger compartment rises to a certain level, the battery 40 can be heated when there is a heating demand to ensure battery performance.

[0208] Fig.15 This is a schematic diagram of the structure of another thermal management system provided in the embodiment of the present application. Fig.15As shown, the thermal management system provided in the embodiment of the present application is used for the fourteenth thermal management mode among different thermal management modes. Enabling the fourth motor water circuit and the first warm air water circuit, the second warm air water circuit, and the third warm air water circuit in the water circuit can meet the requirements of the fourteenth thermal management mode.

[0209] For example, the requirement of the fourteenth thermal management mode is that the PTC heater 47 heats the passenger compartment and the battery at the same time.

[0210] like Fig.15 As shown, the fourth motor water circuit is a closed loop formed by connecting the motor electronic control 31, the first water pump 32, the second passage of the second four-way valve 33, the third water pump 43, the heat exchanger 16, the second passage of the third four-way valve 36 and the first passage of the first three-way valve 41 in series.

[0211] The first warm air water circuit includes a second water pump 34, a PTC heater 47, a first passage of the second three-way valve 35, and a front air conditioner internal heat exchanger 44 which are connected in series in sequence to form a closed loop.

[0212] The second warm air water circuit includes a second water pump 34, a PTC heater 47, a second passage of the second three-way valve 35, a third passage of the third four-way valve 36, a rear air conditioner internal heat exchanger 38 and a fourth passage of the second four-way valve 33 which are connected in series in sequence to form a closed loop.

[0213] The third warm air water circuit includes a second water pump 34, a PTC heater 47, a second passage of the second three-way valve 35, a third passage of the third four-way valve 36, a second passage of the third three-way valve 37, a fourth water pump 39, a battery 40 and a fourth passage of the second four-way valve 33, which are connected in series in sequence to form a closed loop.

[0214] Fig.15 The direction of the arrows in the water circuit indicates the flow direction of the coolant in the fourth motor water circuit, the first warm air water circuit, the second warm air water circuit, and the third warm air water circuit.

[0215] In the fourteenth thermal management mode, the first warm air water circuit, the second warm air water circuit and the third warm air water circuit are used to heat the passenger compartment and the battery 40 through the PTC heater 47, and the fourth motor water circuit is used to store the motor heat for heat storage. The fourteenth thermal management mode usually occurs when the ambient temperature is low (for example, below -18°C) and the passenger compartment and the battery 40 both have heating requirements. This mode is usually switched to after the thirteenth thermal management mode has been running for a period of time to ensure the comfort of the passenger compartment while ensuring the performance of the battery 40.

[0216] Fig.16 This is a schematic diagram of the structure of another thermal management system provided in the embodiment of the present application. Fig.16As shown, the thermal management system provided in the embodiment of the present application is used for the fifteenth thermal management mode among different thermal management modes. Enabling the third refrigerant circuit and the fourth refrigerant circuit in the refrigerant circuit, and enabling the fourth motor water circuit and the fourth warm air water circuit, the fifth warm air water circuit, and the sixth warm air water circuit in the water circuit can meet the requirements of the fifteenth thermal management mode.

[0217] For example, the requirement of the fifteenth thermal management mode is that the heat pump heats the battery 40 and the passenger compartment simultaneously.

[0218] like Fig.16 As shown, the third refrigerant circuit includes a compressor 11, a water-cooled condenser 12, a first electronic expansion valve 18, a third passage of the first four-way valve 13, an internal evaporator 20 of the front air conditioner, a third electronic expansion valve 21, an external heat exchanger 14, a fourth passage of the first four-way valve 13 and a gas-liquid separator 17 which are connected in series in sequence to form a closed loop.

[0219] The fourth refrigerant circuit includes a compressor 11, a water-cooled condenser 12, a first electronic expansion valve 18, a third passage of the first four-way valve 13, a front air-conditioning internal evaporator 20, a second electronic expansion valve 19, a heat exchanger 16, a fourth passage of the first four-way valve 13 and a gas-liquid separator 17, which are connected in series in sequence to form a closed loop.

[0220] The fourth motor water circuit is a closed loop formed by connecting the motor electronic control 31, the first water pump 32, the second passage of the second four-way valve 33, the third water pump 43, the heat exchanger 16, the second passage of the third four-way valve 36 and the first passage of the first three-way valve 41 in series.

[0221] The fourth warm air water circuit is a closed loop formed by connecting the second water pump 34, the water-cooled condenser 12, the first passage of the second three-way valve 35, and the front air-conditioner internal heat exchanger 44 in series in sequence.

[0222] The fifth warm air water circuit is a closed loop formed by connecting the second water pump 34, the water-cooled condenser 12, the second passage of the second three-way valve 35, the third passage of the third four-way valve 36, the rear air-conditioning internal heat exchanger 38 and the fourth passage of the second four-way valve 33 in series in sequence.

[0223] The sixth warm air water circuit is a closed loop formed by connecting in series the second water pump 34, the water-cooled condenser 12, the second passage of the second three-way valve 35, the third passage of the third four-way valve 36, the second passage of the third three-way valve 37, the fourth water pump 39, the battery 40 and the fourth passage of the second four-way valve 33.

[0224] Fig.16The direction of the arrow in the refrigerant circuit indicates the flow direction of the liquid refrigerant in the third refrigerant circuit and the fourth refrigerant circuit, and the direction of the arrow in the water circuit indicates the flow direction of the coolant in the fourth motor water circuit, the fourth warm air water circuit, the fifth warm air water circuit, and the sixth warm air water circuit.

[0225] In the fifteenth thermal management mode, the third refrigerant circuit and the fourth refrigerant circuit are used to provide heat sources for the passenger compartment and the battery 40 through the external heat exchanger 14 and the heat exchanger 16 respectively, the fourth warm air water circuit, the fifth warm air water circuit and the sixth warm air water circuit are used to heat the passenger compartment and the battery 40 by heat exchange through the water-cooled condenser 12 at the same time, and the fourth motor water circuit is used to store the motor heat to accumulate heat.

[0226] Fig.17 This is a schematic diagram of the structure of another thermal management system provided in the embodiment of the present application. Fig.17 As shown, the thermal management system provided in the embodiment of the present application is used in the sixteenth thermal management mode among different thermal management modes. Activating the first refrigerant circuit in the refrigerant circuit, and activating the seventh motor water circuit and the first rear air-conditioning water circuit in the water circuit can meet the requirements of the sixteenth thermal management mode.

[0227] For example, the requirement of the sixteenth thermal management mode is to defrost and remove ice from the external heat exchanger 14 .

[0228] like Fig.17 As shown, the first refrigerant circuit is a closed loop formed by connecting the compressor 11, the water-cooled condenser 12, the first electronic expansion valve 18, the first passage of the first four-way valve 13, the external heat exchanger 14, the second electronic expansion valve 19, the heat exchanger 16, the second passage of the first four-way valve 13 and the gas-liquid separator 17 in series in sequence.

[0229] The seventh motor water circuit includes a motor electronic control 31, a first water pump 32, a first passage of a second four-way valve 33, a second water pump 34, a water-cooled condenser 12, a second passage of a second three-way valve 35, a first passage of a third four-way valve 36 and a first passage of a first three-way valve 41, which are connected in series in sequence to form a closed loop.

[0230] The first rear air conditioning water circuit is a closed loop formed by connecting the third water pump 43, the heat exchanger 16, the fourth passage of the third four-way valve 36, the rear air conditioning internal heat exchanger 38 and the third passage of the second four-way valve 33 in series.

[0231] Fig.17 The arrow direction in the middle refrigerant circuit indicates the flow direction of the liquid refrigerant in the first refrigerant circuit. The arrow direction in the water circuit indicates the flow direction of the coolant in the seventh water circuit and the first rear air conditioning water circuit.

[0232] In the sixteenth thermal management mode, the first refrigerant circuit is used to provide a heat source through the heat exchanger 16, the first rear air-conditioning water circuit is used to provide heat to the external heat exchanger 14 for heating to de-ice, and the seventh motor water circuit is used to recover waste heat from the motor.

[0233] The sixteenth thermal management mode usually occurs in the scenario where there is an ice layer on the surface of the external heat exchanger 14 due to weather reasons when the vehicle is parked or driving in the open air. Due to the existence of the ice layer, the air cannot be exchanged through the external heat exchanger 14, resulting in the inability to open the corresponding circuit using the heat pump, i.e., the second water pump 34 for heating. Therefore, the heat exchanger 16 can be used as an evaporator to absorb the heat of the motor or battery 40 or absorb its heat at the same time to melt the ice layer covering the external heat exchanger 14. The conventional heat pump heating can be turned on after the de-icing is completed. Compared with the prior art, it avoids the increase in energy consumption caused by the intelligent opening of the PTC heater 47 for heating the passenger compartment due to the existence of the ice layer without de-icing first. This thermal management mode can de-ice in a short time, and after de-icing, it can switch to the corresponding mode for heating the passenger compartment, so as to meet the heating demand of the passenger compartment while having low energy consumption.

[0234] It should be noted that Figures 2 to 17 The water tank 45 is not shown in any of the figures.

[0235] It can be seen from the description of the above embodiments that the thermal management system provided by the embodiment of the present application can switch between the heating and cooling modes by controlling different paths of the first four-way valve 13, and the mode switching is simple and easy to control. At the same time, the heating and cooling performance is also improved. For example, in the relevant mode of cooling, the water-cooled condenser 12 and the external heat exchanger 14 simultaneously exchange heat and the water-cooled condenser 12 can supplement heat to the temperature adjustment area for waste heat utilization, thereby improving the cooling efficiency. In the relevant mode of heating, the heat exchanger 16 can be preheated, and the water-cooled condenser 12 provides heat to the passenger compartment again to heat the passenger compartment, thereby improving the heating efficiency. In view of the need for defrosting and deicing, there is no need to start the PTC heater 47 for deicing, thereby solving the problem of high energy consumption of defrosting and deicing in the prior art. In addition, because the ability of the water-cooled condenser 12 to heat the passenger compartment is adjustable, it can meet the arbitrary adjustment of the passenger compartment temperature. In addition, for models that require a rear air-conditioning main unit, the thermal management system provided by the embodiment of the present application simplifies the structure of the rear air-conditioning main unit, so that both cooling and heating can be achieved through the heat exchanger, saving space and reducing costs. Furthermore, in the heating-related mode, ambient heat can also be absorbed. For example, when the external heat exchanger 14 is frozen, the water temperature in the series water tank 45 can be used to select the absorption of ambient heat or motor waste heat.

Claims

1. A thermal management system, characterized in that: include: A refrigerant circuit and a water circuit, wherein the refrigerant circuit contains liquid refrigerant and the water circuit contains cooling liquid; The refrigerant circuit includes a compressor, a water-cooled condenser, a first electronic expansion valve, a first four-way valve, an external heat exchanger, a second electronic expansion valve, a heat exchanger, a gas-liquid separator, and a third electronic expansion valve, and multiple components thereof form corresponding circuits according to the requirements of different thermal management modes; The water circuit includes a motor electronic control, a first water pump, a second four-way valve, a third four-way valve, a first three-way valve, a radiator, the water-cooled condenser, a second three-way valve, a second water pump, the heat exchanger, a third water pump, a fourth water pump, a third three-way valve, and a plurality of components in the battery to form a corresponding circuit according to the requirements of the different thermal management modes; The refrigerant circuit includes a first refrigerant circuit, and / or a second refrigerant circuit, and / or a third refrigerant circuit, and / or a fourth refrigerant circuit; The first refrigerant circuit includes the compressor, the water-cooled condenser, the first electronic expansion valve, the first passage of the first four-way valve, the external heat exchanger, the second electronic expansion valve, the heat exchanger, the second passage of the first four-way valve and the gas-liquid separator, which are connected in series to form a closed loop; The second refrigerant circuit includes the compressor, the water-cooled condenser, the first electronic expansion valve, the first passage of the first four-way valve, the external heat exchanger, the third electronic expansion valve, the front air conditioner internal evaporator, the second passage of the first four-way valve and the gas-liquid separator connected in series to form a closed loop; The third refrigerant circuit includes the compressor, the water-cooled condenser, the first electronic expansion valve, the third passage of the first four-way valve, the front air conditioner internal evaporator, the third electronic expansion valve, the external heat exchanger, the fourth passage of the first four-way valve and the gas-liquid separator, which are connected in series in sequence to form a closed loop; The fourth refrigerant circuit includes the compressor, the water-cooled condenser, the first electronic expansion valve, the third passage of the first four-way valve, the front air conditioner internal evaporator, the second electronic expansion valve, the heat exchanger, the fourth passage of the first four-way valve and the gas-liquid separator, which are connected in series in sequence to form a closed loop; The first port and the third port of the first four-way valve are connected to form a first passage of the first four-way valve, the second port and the fourth port of the first four-way valve are connected to form a second passage of the first four-way valve, the first port and the second port of the first four-way valve are connected to form a third passage of the first four-way valve, and the third port and the fourth port of the first four-way valve are connected to form a fourth passage of the first four-way valve; The water circuit includes a first motor water circuit, and / or a second motor water circuit, and / or a third motor water circuit, and / or a fourth motor water circuit, and / or a fifth motor water circuit, and / or a sixth motor water circuit, and / or a seventh motor water circuit; The first motor water circuit comprises the motor electronic control, the first water pump, the first passage of the second four-way valve, the first passage of the third four-way valve and the first passage of the first three-way valve connected in series to form a closed loop; The second motor water circuit comprises the motor electronic control, the first water pump, the first passage of the second four-way valve, the first passage of the third four-way valve, the second passage of the first three-way valve and the radiator connected in series to form a closed loop; The third motor water circuit includes the motor electronic control, the first water pump, the first passage of the second four-way valve, the second water pump, the water-cooled condenser, the second passage of the second three-way valve, the first passage of the third four-way valve, the second passage of the first three-way valve and the radiator, which are connected in series to form a closed loop; The fourth motor water circuit includes the motor electronic control, the first water pump, the second passage of the second four-way valve, the third water pump, the heat exchanger, the second passage of the third four-way valve and the first passage of the first three-way valve connected in series to form a closed loop; The fifth motor water circuit includes the motor electronic control, the first water pump, the second passage of the second four-way valve, the third water pump, the heat exchanger, the second passage of the third four-way valve, the second passage of the first three-way valve and the radiator connected in series to form a closed loop; The sixth motor water circuit includes the motor electronic control, the first water pump, the first passage of the second four-way valve, the third passage of the third four-way valve, the second passage of the third three-way valve, the fourth water pump, the battery, the third passage of the second four-way valve, the third water pump, the heat exchanger, the second passage of the third four-way valve and the first passage of the first three-way valve connected in series in sequence to form a closed loop; The seventh motor water circuit includes the motor electronic control, the first water pump, the first passage of the second four-way valve, the second water pump, the water-cooled condenser, the second passage of the second three-way valve, the first passage of the third four-way valve and the first passage of the first three-way valve connected in series to form a closed loop; Among them, the first port and the second port of the second four-way valve are connected to form a first passage of the second four-way valve, the first port and the second port of the third four-way valve are connected to form a first passage of the third four-way valve, the first port and the second port of the first three-way valve are connected to form a first passage of the first three-way valve, the first port and the third port of the first three-way valve are connected to form a second passage of the first three-way valve, the first port and the third port of the second three-way valve are connected to form a second passage of the second three-way valve, the first port and the third port of the second four-way valve form a second passage of the second four-way valve, the second port and the fourth port of the third four-way valve form a second passage of the third four-way valve, the first port and the third port of the third four-way valve form a third passage of the third four-way valve, the first port and the third port of the third three-way valve form a second passage of the third three-way valve, and the third port and the fourth port of the second four-way valve form a third passage of the second four-way valve.

2. The thermal management system according to claim 1, characterized in that: The water circuit includes a first battery water circuit, and / or a second battery water circuit, and / or a third battery water circuit; The first battery water circuit includes the third water pump, the heat exchanger, the fourth passage of the third four-way valve, the second passage of the third three-way valve, the fourth water pump, the battery and the third passage of the second four-way valve connected in series in sequence to form a closed loop; The second battery water circuit includes the fourth water pump, the battery, the fourth passage of the second four-way valve, the second water pump, the water-cooled condenser, the second passage of the second three-way valve, the third passage of the third four-way valve and the second passage of the third three-way valve connected in series in sequence to form a closed loop; The third battery water circuit includes the fourth water pump, the battery, the fourth passage of the second four-way valve, the second water pump, the PTC heater, the second passage of the second three-way valve, the third passage of the third four-way valve and the second passage of the third three-way valve connected in series to form a closed loop; The third port and the fourth port of the third four-way valve form a fourth passage of the third four-way valve, and the second port and the fourth port of the second four-way valve form a fourth passage of the second four-way valve.

3. The thermal management system according to claim 2, characterized in that: The water circuit also includes a first rear air conditioning water circuit and / or a second rear air conditioning water circuit; The first rear air-conditioning water circuit includes the third water pump, the heat exchanger, the fourth passage of the third four-way valve, the rear air-conditioning internal heat exchanger and the third passage of the second four-way valve connected in series in sequence to form a closed loop; The second rear air-conditioning water circuit includes the third water pump, the heat exchanger, the fourth passage of the third four-way valve, the second passage of the third three-way valve, the fourth water pump, the battery and the third passage of the second four-way valve, which are connected in series in sequence to form a closed loop.

4. The thermal management system according to claim 3, characterized in that: The water circuit also includes a first warm air water circuit, and / or a second warm air water circuit, and / or a third warm air water circuit; The first warm air water circuit includes the second water pump, the PTC heater, the first passage of the second three-way valve and the front air conditioner internal heat exchanger connected in series to form a closed loop; The second warm air water circuit includes the second water pump, the PTC heater, the second passage of the second three-way valve, the third passage of the third four-way valve, the rear air conditioner internal heat exchanger and the fourth passage of the second four-way valve connected in series in sequence to form a closed loop; The third warm air water circuit includes the second water pump, the PTC heater, the second passage of the second three-way valve, the third passage of the third four-way valve, the second passage of the third three-way valve, the fourth water pump, the battery and the fourth passage of the second four-way valve, which are connected in series in sequence to form a closed loop.

5. The thermal management system according to any one of claims 1 to 4, characterized in that: The different thermal management modes include a first thermal management mode in which a first motor water circuit of the water circuits is enabled; In the first thermal management mode, the first motor water circuit is used to store heat for the motor in the motor electronic control.

6. The thermal management system according to claim 5, characterized in that: The different thermal management modes include a second thermal management mode in which a second motor water circuit of the water circuits is enabled; In the second thermal management mode, the second motor water circuit is used to cool the motor through the radiator.

7. The thermal management system according to claim 4, characterized in that: The different thermal management modes include a third thermal management mode, in which the first refrigerant circuit among the refrigerant circuits is enabled, and the third motor water circuit and the first battery water circuit among the water circuits are enabled; In the third thermal management mode, the first refrigerant circuit is used to provide a cold source for the battery through the heat exchanger, the third motor water circuit is used to release the heat of the motor and the first refrigerant circuit to the environment through the radiator, and the first battery water circuit is used to provide the coolant cooled by the heat exchanger to the battery for cooling.

8. The thermal management system according to claim 7, characterized in that: The different thermal management modes include a fourth thermal management mode, in which a first refrigerant circuit among the refrigerant circuits is enabled, and a fourth motor water circuit and a second battery water circuit among the water circuits are enabled; In the fourth thermal management mode, the first refrigerant circuit is used to provide a heat source for the battery through the water-cooled condenser, the second battery water circuit is used to provide the heat provided by the water-cooled condenser to the battery for heating, and the fourth motor water circuit is used to provide the waste heat of the motor to the heat exchanger for heat absorption.

9. The thermal management system according to claim 8, characterized in that: The different thermal management modes include a fifth thermal management mode, in which a first refrigerant circuit among the refrigerant circuits is activated, and a fifth motor water circuit and a second battery water circuit among the water circuits are activated; In the fifth thermal management mode, the first refrigerant circuit is used to provide a heat source for the battery through the water-cooled condenser, the second battery water circuit is used to provide the heat provided by the water-cooled condenser to the battery for heating, and the fifth motor water circuit is used to absorb ambient heat through the radiator and provide it to the first refrigerant circuit for absorption through the heat exchanger.

10. The thermal management system according to claim 9, characterized in that: The different thermal management modes include a sixth thermal management mode in which a sixth motor water circuit of the water circuits is enabled; In the sixth thermal management mode, the sixth motor water circuit is used to recover the heat of the motor and use the recovered heat to heat the battery.

11. The thermal management system according to claim 10, characterized in that: The different thermal management modes include a seventh thermal management mode, in which a fourth motor water circuit and a third battery water circuit of the water circuits are enabled; In the seventh thermal management mode, the third battery water circuit is used to provide the heat generated by the PTC heater to the battery to increase the temperature, and the fourth motor water circuit is used to store the heat of the motor to store heat.

12. The thermal management system according to claim 11, characterized in that: The different thermal management modes include an eighth thermal management mode, in which the first refrigerant circuit and the second refrigerant circuit of the refrigerant circuit are activated, and the third motor water circuit and the first rear air conditioning water circuit of the water circuit are activated; In the eighth thermal management mode, the first refrigerant circuit and the second refrigerant circuit are used to provide a cold source for the passenger compartment through the heat exchanger and the front air-conditioning internal evaporator respectively, the first rear air-conditioning water circuit is used to provide the coolant cooled by the heat exchanger to the rear air-conditioning internal heat exchanger for heat exchange to cool the passenger compartment, the third motor water circuit is used to release the heat of the motor and the first refrigerant circuit and the second refrigerant circuit to the environment through the radiator, and the battery is self-circulating.

13. The thermal management system according to claim 12, characterized in that: The different thermal management modes include a ninth thermal management mode, in which the first and second refrigerant circuits of the refrigerant circuits are activated, and the third motor water circuit, the first rear air-conditioning water circuit, and the second air-conditioning water circuit of the water circuits are activated; In the ninth thermal management mode, the second refrigerant circuit and the third refrigerant circuit are used to provide a cold source for the passenger compartment and the battery through the heat exchanger and the front air-conditioning internal evaporator respectively, the first rear air-conditioning water circuit and the second rear air-conditioning water circuit are used to provide the coolant cooled by the heat exchanger to the rear air-conditioning internal heat exchanger and the battery respectively for heat exchange to cool the passenger compartment and the battery, and the third motor water circuit is used to release the heat of the motor and the first refrigerant circuit and the second refrigerant circuit to the environment through the radiator.

14. The thermal management system according to claim 13, characterized in that: The different thermal management modes include a tenth thermal management mode, in which the third refrigerant circuit and the fourth refrigerant circuit of the refrigerant circuit are activated, and the seventh motor water circuit and the first rear air conditioning water circuit of the water circuit are activated; In the tenth thermal management mode, the third refrigerant circuit and the fourth refrigerant circuit are used to provide a heat source for the passenger compartment through the external heat exchanger and the heat exchanger respectively, the first rear air-conditioning water circuit is used to provide the heat provided by the heat exchanger to the passenger compartment for heating, and the seventh motor water circuit is used to recover the waste heat of the motor.

15. The thermal management system according to claim 14, characterized in that: The different thermal management modes include an eleventh thermal management mode, in which the third refrigerant circuit and the fourth refrigerant circuit of the refrigerant circuit are activated, and the fifth motor water circuit and the first rear air conditioning water circuit of the water circuit are activated; In the eleventh thermal management mode, the third refrigerant circuit and the fourth refrigerant circuit are used to provide heat sources for the passenger compartment through the external heat exchanger and the heat exchanger respectively, the first rear air-conditioning water circuit is used to provide the heat provided by the heat exchanger to the passenger compartment for heating, and the fifth motor water circuit is used to absorb ambient heat through the radiator and provide it to the third refrigerant circuit and the fourth refrigerant circuit for absorption through the heat exchanger.

16. The thermal management system according to claim 15, characterized in that: The different thermal management modes include a twelfth thermal management mode, in which a fourth refrigerant circuit among the refrigerant circuits is activated, and a fifth motor water circuit and a first rear air conditioning water circuit among the water circuits are activated; In the twelfth thermal management mode, the fourth refrigerant circuit is used to provide a heat source for the passenger compartment through the heat exchanger, the first rear air-conditioning water circuit is used to provide the heat provided by the heat exchanger to the passenger compartment for heating, and the fifth motor water circuit is used to absorb ambient heat through the radiator and provide it to the fourth refrigerant circuit for absorption through the heat exchanger.

17. The thermal management system according to claim 16, characterized in that: The different thermal management modes include a thirteenth thermal management mode, in which the first warm air water circuit and the fourth motor water circuit of the water circuits are enabled; In the thirteenth thermal management mode, the first warm air water circuit is used to heat the passenger compartment through the PTC heater, the fourth motor water circuit is used to store the heat of the motor to store heat, and the battery is self-insulated.

18. The thermal management system according to claim 17, characterized in that: The different thermal management modes include a fourteenth thermal management mode, in which the first warm air water circuit, the second warm air water circuit, the third warm air water circuit and the fourth motor water circuit of the water circuits are enabled; In the fourteenth thermal management mode, the first warm air water circuit, the second warm air water circuit, and the third warm air water circuit are simultaneously used to heat the passenger compartment and the battery through the PTC heater, and the fourth motor water circuit is used to store the heat of the motor to store heat.

19. The thermal management system according to claim 18, characterized in that: The different thermal management modes include a fifteenth thermal management mode, in which the third refrigerant circuit and the fourth refrigerant circuit in the refrigerant circuit are activated, and the fourth warm air water circuit, the fifth warm air water circuit, the sixth warm air water circuit and the fourth motor water circuit in the water circuit are activated; In the fifteenth thermal management mode, the third refrigerant circuit and the fourth refrigerant circuit are used to provide heat sources for the passenger compartment and the battery through the external heat exchanger and the heat exchanger respectively, the fourth warm air water circuit, the fifth warm air water circuit and the sixth warm air water circuit are simultaneously used to heat the passenger compartment and the battery through heat exchange through the water-cooled condenser, and the fourth motor water circuit is used to store the heat of the motor to accumulate heat.

20. The thermal management system according to claim 19, characterized in that: The different thermal management modes include a sixteenth thermal management mode, in which the first refrigerant circuit among the refrigerant circuits is activated, and the seventh motor water circuit and the first rear air conditioning water circuit among the water circuits are activated; In the sixteenth thermal management mode, the first refrigerant circuit is used to provide a heat source through the heat exchanger, the first rear air-conditioning water circuit is used to provide heat to the external heat exchanger for heating up for deicing, and the seventh motor water circuit is used to recover waste heat from the motor.

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