Thermal management system and automobile

Abstract

The invention relates to a thermal management system and an automobile. The heat management system comprises a refrigerant loop and a water loop. The refrigerant loop comprises a compressor, a condenser, a first valve and a cooler, and further comprises one of a liquid storage tank and a gas-liquid separator. Under the condition that the refrigerant loop comprises the liquid storage tank, the input end of the liquid storage tank is connected with the first output end of the condenser, and the output end of the liquid storage tank is connected with the input end of the first valve. And under the condition that the refrigerant loop comprises the gas-liquid separator, the input end of the gas-liquid separator is connected with the first output end of the cooler, and the output end of the gas-liquid separator is connected with the input end of the compressor. The refrigerant loop is configured to circulate a refrigerant, absorb or release heat and achieve refrigeration or heating. The water loop comprises a plurality of loops, and at least part of the loops comprise a condenser and / or a cooler; the water circuit is configured to transfer heat, regulate temperature. Through cooperation of the refrigerant loop and the water loop, the heat management system can stably operate in a low-temperature environment.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile manufacturing, and in particular to a thermal management system and an automobile. Background Art

[0002] The electric vehicle thermal management system absorbs heat from the external environment and transfers it to the vehicle through the circulation of refrigerant to achieve the heating function; and during the operation of the thermal management system, it only consumes a small amount of electricity to drive components such as the compressor, and has a high energy efficiency ratio, which helps to reduce the vehicle's energy consumption and carbon emissions. Therefore, electric vehicles can choose a thermal management system to deal with the heating problem.

[0003] However, the thermal management system is greatly restricted by the ambient temperature. When the ambient temperature is below -10℃, the refrigerant pressure and density on the suction side of the compressor will decrease, which will cause the heating efficiency and heating capacity of the thermal management system to be greatly reduced. The compressor is prone to enter the shutdown protection state and cannot provide users with stable heating output. When the ambient temperature is -15℃ and below, the thermal management system basically cannot work normally. Summary of the invention

[0004] One of the purposes of the present invention is to provide a thermal management system to solve the problem that the thermal management system in the prior art cannot provide normal heating performance under relatively low temperature environment; the second purpose is to provide a car.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A thermal management system includes a refrigerant circuit and a water circuit.

[0007] The refrigerant circuit includes: a compressor, a condenser, a first valve, a cooler, and also includes one of a liquid storage tank and a gas-liquid separator.

[0008] The output end of the compressor is connected to the first input end of the condenser, the first output end of the condenser is connected to the input end of the first valve, the output end of the first valve is connected to the first input end of the cooler, and the first output end of the cooler is connected to the input end of the compressor.

[0009] In the case where the refrigerant circuit includes a liquid storage tank, the input end of the liquid storage tank is connected to the first output end of the condenser, and the output end of the liquid storage tank is connected to the input end of the first valve.

[0010] When the refrigerant circuit includes a gas-liquid separator, the input end of the gas-liquid separator is connected to the first output end of the cooler, and the output end of the gas-liquid separator is connected to the input end of the compressor.

[0011] The refrigerant circuit is configured to circulate refrigerant, absorb or release heat, and achieve cooling or heating.

[0012] The water circuit comprises a plurality of circuits, at least some of which comprise condensers and / or coolers.

[0013] The water circuit is configured to transfer heat and regulate temperature.

[0014] According to the above technical means, by controlling the speed and power of the compressor, the intake pressure and refrigerant flow rate can be dynamically adjusted to meet the heating needs in low temperature environments. The opening of the first valve can be accurately controlled to adjust the flow rate of the refrigerant according to the needs of the thermal management system, especially in low temperature environments, the valve opening can be appropriately increased to increase the refrigerant flow rate; the condenser and cooler enable the refrigerant to quickly release or absorb heat at low temperatures to ensure heating performance; adding a liquid storage tank to the refrigerant circuit can store a certain amount of refrigerant to prevent the refrigerant from being reduced due to condensation at low temperatures, thereby maintaining a continuous supply and stable flow of refrigerant, or using a gas-liquid separator to effectively separate the gas and liquid in the refrigerant flowing out of the cooler, ensuring that the refrigerant entering the compressor is pure liquid, and improving the operating efficiency of the compressor in low temperature environments. Through the compressor, condenser, first valve and cooler, in conjunction with the liquid storage tank or gas-liquid separator, the stability of the refrigerant flow rate or the operating efficiency of the compressor in low temperature environments can be achieved, which can ensure that the thermal management system provides normal heating performance at low temperatures. At the same time, the water circuit exchanges heat with the refrigerant circuit through the condenser and cooler, thereby achieving heat transfer and temperature regulation, so that the water circuit can operate stably even in a low temperature environment.

[0015] Therefore, through the coordination of the refrigerant circuit and the water circuit, the thermal management system can operate stably in a relatively low temperature environment, which can effectively reduce the system energy consumption and cost.

[0016] Furthermore, the water circuit includes: a first circuit, a second circuit, a third circuit and a fourth circuit. The first circuit, the second circuit, the third circuit and the fourth circuit are all connected to the eight-way water valve.

[0017] The input ends of the eight-way water valve include: a first input end, a second input end, a third input end and a fourth input end.

[0018] The output ends of the eight-way water valve include: a first output end, a second output end, a third output end and a fourth output end.

[0019] The first end of the first loop is connected to the first output end of the eight-way water valve, and the second end of the first loop is connected to the first input end of the eight-way water valve.

[0020] The first end of the second loop is connected to the second output end of the eight-way water valve, and the second end of the second loop is connected to the second input end of the eight-way water valve.

[0021] The first end of the third loop is connected to the third output end of the eight-way water valve, and the second end of the third loop is connected to the third input end of the eight-way water valve.

[0022] The first end of the fourth loop is connected to the fourth output end of the eight-way water valve, and the second end of the third loop is connected to the fourth input end of the eight-way water valve.

[0023] The eight-way water valve controls the fluid flow direction and flow rate of the first circuit, the second circuit, the third circuit and the fourth circuit by connecting and switching the input end and the output end.

[0024] According to the above technical means, the eight-way water valve plays a key control role. It can flexibly control the fluid flow direction and flow rate of the condenser in the first circuit, the battery module in the second circuit, the motor module in the third circuit and the cooler in the fourth circuit through the connection and switching of its multiple input and output terminals, so that the water circuit system can be dynamically adjusted according to different operating requirements, thereby improving the flexibility and efficiency of the thermal management system.

[0025] Furthermore, the first circuit includes: a first three-way valve, a first water pump, a condenser and a second three-way proportional valve.

[0026] The input end of the first three-way valve is connected to the first output end of the eight-way water valve, the output end of the first three-way valve is connected to the input end of the first water pump, the output end of the first water pump is connected to the second input end of the condenser, the second output end of the condenser is connected to the first input end of the second three-way proportional valve; the first output end of the second three-way proportional valve is connected to the first input end of the eight-way water valve.

[0027] According to the above technical means, the coordinated work of various components in the first circuit realizes the functions of circulating flow of cooling medium, temperature regulation, flow control and system balance, providing important support for the cooling or heating system of the entire thermal management system.

[0028] Furthermore, the first circuit also includes: a warm air core.

[0029] The input end of the heater core is connected to the second output end of the second three-way proportional valve, and the output end of the heater core is connected to the second input end of the first three-way valve. The heater core is configured to heat the air.

[0030] According to the above technical means, the water circuit enhances the warm air or heating function.

[0031] Furthermore, the first circuit further comprises: a sixth temperature sensor. The sixth temperature sensor is connected to the input end of the heater core and to the second output end of the second three-way proportional valve.

[0032] According to the above technical means, the working status of the heating system can be monitored and evaluated to ensure the comfort of passengers in the car and the performance of the heating system.

[0033] Furthermore, the second circuit includes: a third three-way valve, a second water pump, a battery module and a fourth three-way valve.

[0034] The first input end of the third three-way valve is connected to the second output end of the eight-way water valve, the output end of the third three-way valve is connected to the input end of the second water pump, the output end of the second water pump is connected to the input end of the battery module, the output end of the battery module is connected to the input end of the fourth three-way valve, and the first output end of the fourth three-way valve is connected to the second input end of the eight-way water valve.

[0035] According to the above technical means, effective cooling or heating of the battery module is achieved.

[0036] Furthermore, the second circuit further comprises: a one-way valve, wherein the input end of the one-way valve is connected to the second output end of the fourth three-way valve, and the output end of the one-way valve is connected to the second input end of the third three-way valve.

[0037] According to the above technical means, the one-way valve can protect other components in the second circuit from being damaged by the reverse flow fluid; and can also optimize the cooling or heating effect.

[0038] Furthermore, the second circuit further includes: a first temperature sensor and a second temperature sensor.

[0039] The first temperature sensor is connected to the input end of the battery module and to the output end of the second water pump. The second temperature sensor is connected to the output end of the battery module and to the input end of the fourth three-way valve.

[0040] According to the above technical means, the temperature changes of the battery module during the charging and discharging process can be accurately monitored to ensure the safety and performance stability of the battery pack.

[0041] Furthermore, the third circuit includes: a fifth three-way valve, a cooling module, a third three-way proportional valve and a motor module.

[0042] The input end of the fifth three-way valve is connected to the third output end of the eight-way water valve, the first output end of the fifth three-way valve is connected to the input end of the cooling module, and the second output end of the fifth three-way valve is connected to the second input end of the third three-way proportional valve; the output end of the cooling module is connected to the first input end of the third three-way proportional valve; the output end of the third three-way proportional valve is connected to the input end of the motor module, and the output end of the motor module is connected to the third input end of the eight-way water valve.

[0043] According to the above technical means, the circulation flow and heat exchange of the cooling medium between the motor module and the cooling module are realized.

[0044] Furthermore, the third circuit also includes: a third temperature sensor and a fourth temperature sensor.

[0045] The third temperature sensor is connected to the input end of the motor module and to the output end of the third three-way proportional valve. The fourth temperature sensor is connected to the output end of the motor module and to the third input end of the eight-way water valve.

[0046] According to the above technical means, the temperature changes caused by the heat generated during the operation of the motor module can be measured, the cooling strategy of the motor can be adjusted, the load distribution of the motor can be optimized, the energy conversion efficiency of the motor can be improved, etc., thereby further improving the performance and stability of the entire system.

[0047] Furthermore, the fourth circuit includes: a second three-way valve, a third water pump, a cooler and a first three-way proportional valve.

[0048] The first input end of the second three-way valve is connected to the fourth output end of the eight-way water valve, the output end of the second three-way valve is connected to the input end of the third water pump, the output end of the third water pump is connected to the second input end of the cooler, the second output end of the cooler is connected to the input end of the first three-way proportional valve, and the first output end of the first three-way proportional valve is connected to the fourth input end of the eight-way water valve.

[0049] According to the above technical means, the circulation flow and temperature control of the cooling medium are realized through the coordinated work of the eight-way water valve, the second three-way valve, the third water pump, the cooler and the first three-way proportional valve.

[0050] Furthermore, the fourth circuit further includes: a cold air core. The input end of the cold air core is connected to the second output end of the first three-way proportional valve, and the output end of the cold air core is connected to the second input end of the second three-way valve. The cold air core is configured to cool and dehumidify the air.

[0051] According to the above technical means, the water channel module not only enhances the cooling capacity, but also increases the regulating function of the air environment.

[0052] Furthermore, the fourth circuit further includes: a fifth temperature sensor. The fifth temperature sensor is connected to the input end of the cold air core and to the second output end of the first three-way proportional valve.

[0053] According to the above technical means, the temperature of the input end of the cold air core can be accurately monitored, so as to more effectively evaluate and adjust the performance of the entire cooling system.

[0054] Furthermore, the water circuit further comprises: a fifth circuit. The fifth circuit comprises: a fourth three-way proportional valve, a condenser, a cooler, a sixth three-way valve, a seventh three-way valve, a first water pump, an eighth three-way valve and a stop valve.

[0055] The output end of the fourth three-way proportional valve is connected to the input end of the first water pump, the output end of the first water pump is connected to the second input end of the condenser, the second output end of the condenser is connected to the input end of the sixth three-way valve, the first output end of the sixth three-way valve is connected to the input end of the stop valve, the output end of the stop valve is connected to the first input end of the seventh three-way valve, the output end of the seventh three-way valve is connected to the second input end of the cooler, and the second output end of the cooler is connected to the input end of the eighth three-way valve; the first output end of the eighth three-way valve is connected to the first input end of the fourth three-way proportional valve.

[0056] According to the above technical means, by controlling the fourth three-way proportional valve, the eighth three-way valve and the stop valve, it is possible to increase the intake pressure and refrigerant flow of the electric compressor in an ultra-low temperature environment (<-20°C), ensure that the thermal system provides normal heating performance at low temperatures, and enable the thermal management system to operate stably in an ultra-low temperature environment (<-20°C).

[0057] Furthermore, the refrigerant circuit also includes: a first temperature and pressure sensor and a second temperature and pressure sensor.

[0058] The first temperature and pressure sensor is connected to the output end of the compressor and to the first input end of the condenser. The second temperature and pressure sensor is connected to the input end of the compressor and to the output end of the liquid storage tank and / or the gas-liquid separator.

[0059] According to the above technical means, the temperature and pressure of the compressor input and output ends can be monitored and measured in real time, thereby ensuring the stable operation and efficient performance of the refrigerant system.

[0060] Furthermore, the refrigerant includes propane.

[0061] According to the above technical means, propane has a high latent heat of evaporation and can absorb a large amount of heat during the evaporation process, thereby effectively achieving a cooling effect. At the same time, its condensation process can also release a lot of heat, which is helpful for the heating process. When applied to the above thermal management system, it can achieve the replacement application of low global warming potential refrigerants.

[0062] Further, the thermal management system includes an eight-way water valve. The operation mode of the thermal management system includes a single passenger compartment cooling mode, and when the thermal management system is in the single passenger compartment cooling mode, the first input end and the third output end of the eight-way water valve are connected, and the third input end and the first output end of the eight-way water valve are connected.

[0063] According to the above technical means, it is possible to provide cooling to the passenger compartment on demand.

[0064] Furthermore, the operating mode of the thermal management system also includes a single battery cooling mode. When the thermal management system is in the single battery cooling mode, the first input end and the third output end of the eight-way water valve are connected, the second input end and the fourth output end of the eight-way water valve are connected, the third input end and the first output end of the eight-way water valve are connected, and the fourth input end and the second output end of the eight-way water valve are connected.

[0065] According to the above technical means, it is possible to provide cooling capacity for the battery module on demand.

[0066] Furthermore, the operating mode of the thermal management system also includes a simultaneous cooling mode for the passenger compartment and the battery. When the thermal management system is in the simultaneous cooling mode for the passenger compartment and the battery, the first input end and the third output end of the eight-way water valve are connected, the second input end and the fourth output end of the eight-way water valve are connected, the third input end and the first output end of the eight-way water valve are connected, and the fourth input end and the second output end of the eight-way water valve are connected.

[0067] According to the above-mentioned technical means, it is possible to provide cooling to the passenger compartment and battery module on demand.

[0068] Furthermore, the operating mode of the thermal management system also includes a battery natural cooling mode. When the thermal management system is in the battery natural cooling mode, the first input end and the second output end of the eight-way water valve are connected, the second input end and the fourth output end of the eight-way water valve are connected, the third input end and the first output end of the eight-way water valve are connected, and the fourth input end and the third output end of the eight-way water valve are connected.

[0069] According to the above technical means, the heat generated by the battery is discharged into the air through the cooling module; the battery thermal management requirements are met by adjusting the rotation speed of the second water pump and the cooling module.

[0070] Furthermore, the operating mode of the thermal management system also includes a motor-only cooling mode. When the thermal management system is in the motor-only cooling mode, the first input end and the third output end of the eight-way water valve are connected, and the third input end and the first output end of the eight-way water valve are connected.

[0071] According to the above technical means, the heat generated by the motor module is discharged into the air through the cooling module; the electric drive thermal management requirements can be achieved by adjusting the rotation speed of the first water pump and the cooling module.

[0072] Furthermore, the operating mode of the thermal management system also includes a single passenger compartment heating mode. When the thermal management system is in the single passenger compartment heating mode, the third input end and the fourth output end of the eight-way water valve are connected, and the fourth input end and the third output end of the eight-way water valve are connected.

[0073] According to the above technical means, it is possible to provide heat to the passenger compartment on demand.

[0074] Furthermore, the operating mode of the thermal management system also includes a passenger compartment heating and dehumidification mode. When the thermal management system is in the passenger compartment heating and dehumidification mode, the third input end and the fourth output end of the eight-way water valve are connected, and the fourth input end and the third output end of the eight-way water valve are connected.

[0075] According to the above-mentioned technical means, it is possible to provide heat, cool and dehumidify the passenger compartment on demand.

[0076] Furthermore, the operating mode of the thermal management system also includes a single battery heating mode. When the thermal management system is in the single battery heating mode, the first input end and the second output end of the eight-way water valve are connected, and the second input end and the first output end of the eight-way water valve are connected, the third input end and the fourth output end of the eight-way water valve are connected, and the fourth input end and the third output end of the eight-way water valve are connected.

[0077] According to the above technical means, it is possible to provide heat to the battery module on demand.

[0078] Furthermore, the operating mode of the thermal management system also includes a simultaneous heating mode of the passenger compartment and the battery. When the thermal management system is in the simultaneous heating mode of the passenger compartment and the battery, the first input end and the second output end of the eight-way water valve are connected, and the second input end and the first output end of the eight-way water valve are connected, the third input end and the fourth output end of the eight-way water valve are connected, and the fourth input end and the third output end of the eight-way water valve are connected.

[0079] According to the above technical means, heat can be provided to the passenger compartment and the battery on demand.

[0080] Furthermore, the operating mode of the thermal management system also includes a hot water bypass single passenger compartment heating mode. When the thermal management system is in the hot water bypass single passenger compartment heating mode, the first input end and the second output end of the eight-way water valve are connected, and the second input end and the first output end of the eight-way water valve are connected, the third input end and the fourth output end of the eight-way water valve are connected, and the fourth input end and the third output end of the eight-way water valve are connected.

[0081] According to the above technical means, it is possible to provide heating for the passenger compartment, heat for the refrigerant system, and heat for the passenger compartment, and enable the thermal management system to operate stably in an ultra-low temperature environment (<-20°C).

[0082] An automobile comprises any thermal management system as described above.

[0083] It can be understood that the beneficial effects that can be achieved by the automobile provided by the above embodiment of the present invention can refer to the beneficial effects of the thermal management system mentioned above, and will not be repeated here.

[0084] Beneficial effects of the present invention:

[0085] (1) The present invention is an integrated thermal management system that can take into account a variety of refrigerants. By controlling the speed and power of the compressor, the intake pressure and refrigerant flow rate can be dynamically adjusted to meet the heating needs in low-temperature environments. Adding a liquid storage tank in the refrigerant circuit can store a certain amount of refrigerant to prevent the refrigerant from being reduced due to condensation at low temperatures, thereby maintaining a continuous supply and stable flow of refrigerant, or using a gas-liquid separator to effectively separate the gas and liquid in the refrigerant flowing out of the cooler, ensuring that the refrigerant entering the compressor is pure liquid, thereby improving the intake pressure and efficiency of the compressor. Accurately controlling the opening of the first valve can adjust the refrigerant flow rate according to the needs of the thermal management system, especially in low-temperature environments, appropriately increasing the valve opening to increase the refrigerant flow rate. The condenser and cooler enable the refrigerant to quickly release or absorb heat even at low temperatures to ensure heating performance; it can improve the intake pressure and refrigerant flow rate of the electric compressor in low-temperature environments to ensure that the thermal system provides normal heating performance at low temperatures. Through the coordination of the refrigerant circuit and the water circuit, the thermal management system can operate stably in a relatively low temperature environment, so that the thermal management system can operate at an ambient temperature of -15°C or below.

[0086] (2) The refrigerant cycle of the present invention is designed as a whole in a miniaturized and integrated manner; the entire refrigeration system can be arranged in the engine compartment, eliminating the risk of flammable refrigerant leaking into the passenger compartment, thereby ensuring vehicle safety.

[0087] (3) The water circuit of the present invention integrates passenger compartment thermal management, low-temperature cooling and battery thermal management into a whole. Through the switching of valves, the water-cooled condenser and battery cooler can be combined with each other to act as a heat source or a cold source to perform passenger compartment thermal management and battery thermal management, and can reasonably cool the motor system and utilize waste heat, so that the thermal management system can operate at a better working cycle in various scenarios and can effectively reduce system energy consumption and costs.

[0088] (4) The water circuit of the present invention adopts a hot water bypass solution, which can enable the thermal management system to operate stably in an ultra-low temperature environment (<-20°C), and can effectively reduce the energy consumption and cost of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0089] Figure 1A A schematic diagram of the structure of a thermal management system provided by the present invention;

[0090] Figure 1B A schematic diagram of the structure of another thermal management system provided by the present invention;

[0091] Figure 1C A schematic diagram of the structure of another thermal management system provided by the present invention;

[0092] Figure 1D A schematic diagram of the structure of another thermal management system provided by the present invention;

[0093] Figure 2 A schematic diagram of the connectivity of a thermal management system in a passenger compartment independent cooling mode provided by the present invention;

[0094] Figure 3 A schematic diagram of the connectivity of a thermal management system in a battery independent cooling mode provided by the present invention;

[0095] Figure 4 A schematic diagram of the connection relationship of a thermal management system in a mode where a passenger compartment and a battery are cooled simultaneously provided by the present invention;

[0096] Figure 5 A schematic diagram of the connectivity of a thermal management system in a battery natural cooling mode provided by the present invention;

[0097] Figure 6 A schematic diagram of the connectivity of a thermal management system in a natural cooling mode of a motor provided by the present invention;

[0098] Figure 7 A schematic diagram of the connectivity of a thermal management system in a single passenger compartment heating mode provided by the present invention;

[0099] Figure 8 A schematic diagram of the connectivity of a thermal management system in a passenger cabin heating and dehumidification mode provided by the present invention;

[0100] Fig. 9 A schematic diagram of the connectivity of a thermal management system in a battery-only heating mode provided by the present invention;

[0101] Fig.10 A schematic diagram of the connection relationship of a thermal management system in a mode where a passenger compartment and a battery are heated simultaneously provided by the present invention;

[0102] Fig.11 A schematic diagram of the connectivity of a thermal management system in a hot water bypass single passenger compartment heating mode provided by the present invention.

[0103] Among them, 1-compressor; 2-condenser; 3-first valve; 4-cooler; 5-liquid storage tank; 6-gas-liquid separator; 701-first three-way valve; 702-second three-way valve; 703-third three-way valve; 704-fourth three-way valve; 705-fifth three-way valve; 706-sixth three-way valve; 707-seventh three-way valve; 708-eighth three-way valve; 801-first three-way proportional valve; 802-second three-way proportional valve; 803-third three-way proportional valve; 804-fourth three-way proportional valve; 901-first water pump; 902-second water pump; 903-third water pump; 10-battery module; 11-one-way valve; 12-eight-way water valve; 1221-first output end of the eight-way water valve; 1222-eight-way water valve the second output end of the eight-way water valve; 1223-the third output end of the eight-way water valve; 1224-the fourth output end of the eight-way water valve; 1211-the first input end of the eight-way water valve; 1212-the second input end of the eight-way water valve; 1213-the third input end of the eight-way water valve; 1214-the fourth input end of the eight-way water valve; 1301-cold air core; 1302-warm air core; 14-cooling module; 15-motor module; 16-stop valve; 1701-the first temperature sensor; 1702-the second temperature sensor; 1703-the third temperature sensor; 1704-the fourth temperature sensor; 1705-the fifth temperature sensor; 1706-the sixth temperature sensor; 1801-the first temperature and pressure sensor; 1802-the second temperature and pressure sensor. DETAILED DESCRIPTION

[0104] The following will describe the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0105] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0106] Pure electric vehicles face many challenges in heating in low-temperature environments due to the lack of engine heat sources. Although the PTC (Positive Temperature Coefficient) heating method is simple and direct, its heating efficiency is low and its energy consumption is high.

[0107] This embodiment provides a car, which includes a thermal management system.

[0108] The thermal management system absorbs heat from the external environment through the circulation of refrigerant and transfers it to the vehicle to achieve the heating function. This method is more efficient than PTC heating and does not require direct consumption of electricity to generate heat. Moreover, during operation, the thermal management system only needs to consume a small amount of electricity to drive components such as the compressor. Most of the heat comes from the external environment. Therefore, it has a higher energy efficiency ratio, which helps to reduce the vehicle's energy consumption and carbon emissions.

[0109] However, the thermal management system is greatly restricted by the ambient temperature. When the ambient temperature is below -10℃, the refrigerant pressure and density on the suction side of the compressor will decrease, which will cause the heating efficiency and heating capacity of the thermal management system to drop significantly. The compressor is prone to enter the shutdown protection state and cannot provide users with stable heating output. When the ambient temperature is -15℃ or below, the thermal management system basically cannot work normally.

[0110] Based on this, this embodiment proposes a thermal management system. Figure 1A As shown, the thermal management system includes: a refrigerant circuit I and a water circuit II.

[0111] The refrigerant circuit I includes: a compressor 1, a condenser 2, a first valve 3, a cooler 4, and also includes one of a liquid storage tank 5 and a gas-liquid separator 6.

[0112] The output end of the compressor 1 is connected to the first input end of the condenser 2 , the first output end of the condenser 2 is connected to the input end of the first valve 3 , the output end of the first valve 3 is connected to the first input end of the cooler 4 , and the first output end of the cooler 4 is connected to the input end of the compressor 1 .

[0113] When the refrigerant circuit I includes a liquid storage tank 5, the input end of the liquid storage tank 5 is connected to the first output end of the condenser 2, and the output end of the liquid storage tank 5 is connected to the input end of the first valve 3.

[0114] When the refrigerant circuit I includes a gas-liquid separator 6, the input end of the gas-liquid separator 6 is connected to the first output end of the cooler 4, and the output end of the gas-liquid separator 6 is connected to the input end of the compressor 1.

[0115] The refrigerant circuit I is configured to circulate refrigerant, absorb or release heat, and achieve cooling or heating.

[0116] The water circuit II includes a plurality of circuits, at least some of which include a condenser 2 and / or a cooler 4 .

[0117] Water circuit II is configured to transfer heat and regulate temperature.

[0118] Compressor 1 is the starting point of the refrigerant circuit I, and plays the role of suction, compression and circulation pump. It sucks the refrigerant from the low-pressure side, increases its temperature and pressure after compression, and then pumps it into the high-pressure side to complete the circulation of the refrigerant, that is, absorbs or releases heat through the circulating refrigerant (such as propane), thereby achieving the effect of cooling or heating.

[0119] The main function of the condenser 2 is to condense the high-temperature and high-pressure refrigerant gas into liquid and release heat to the external environment. The heat dissipation effect of the condenser 2 directly affects the refrigeration capacity and efficiency of the system.

[0120] The first valve 3 is used to control the flow rate or direction of the refrigerant.

[0121] Exemplarily, the first valve 3 may be an electronic expansion valve.

[0122] The cooler 4 has a heat absorbing function. When the refrigerant flows through the cooler 4 , it absorbs heat and evaporates into gas, thereby reducing the temperature of the cooler 4 .

[0123] The liquid storage tank 5 is used to store liquid refrigerant and filter and separate impurities and gas in the liquid refrigerant. The gas-liquid separator 6 is used to separate gas and liquid in the refrigerant to ensure that only gas enters the compressor 1 for the next cycle. The use of either the liquid storage tank 5 or the gas-liquid separator 6 in the refrigerant circuit 1 helps maintain the stability and reliability of the system and prevents failures caused by uneven distribution or abnormal state of the refrigerant.

[0124] By controlling the speed and power of the compressor 1, the intake pressure and the refrigerant flow rate can be dynamically adjusted to meet the heating requirements in a low temperature environment. The opening of the first valve 3 can be accurately controlled to adjust the refrigerant flow rate according to system requirements, especially in a low temperature environment, the valve opening can be appropriately increased to increase the refrigerant flow rate. The condenser 2 and the cooler 4 enable the refrigerant to quickly release or absorb heat at low temperatures to ensure heating performance; and, by adding a liquid storage tank 5 to the refrigerant circuit I, a certain amount of refrigerant can be stored to prevent the refrigerant from being reduced due to condensation at low temperatures, thereby maintaining a continuous supply and stable flow of the refrigerant, or using a gas-liquid separator 6 to effectively separate the gas and liquid in the refrigerant flowing out of the cooler 4, ensuring that the refrigerant entering the compressor 1 is in a pure liquid state, and improving the operating efficiency of the compressor 1 in a low temperature environment. In other words, through the compressor 1, the condenser 2, the first valve 3 and the cooler 4, in conjunction with the liquid storage tank 5 or the gas-liquid separator 6, the stability of the refrigerant flow rate or the operating efficiency of the compressor 1 in a low temperature environment is achieved, and the thermal management system can be guaranteed to provide normal heating performance at low temperatures.

[0125] At the same time, the water circuit II exchanges heat with the refrigerant circuit I through the condenser 2 and the cooler 4, thereby achieving heat transfer and temperature regulation, so that the water circuit II can also operate stably in a low temperature environment.

[0126] Therefore, through the coordination of refrigerant circuit I and water circuit II, the thermal management system can operate stably in a relatively low temperature environment, which can effectively reduce system energy consumption and costs.

[0127] In this embodiment, Figure 1A As shown, the water circuit II includes: a first circuit, a second circuit, a third circuit and a fourth circuit. The first circuit, the second circuit, the third circuit and the fourth circuit are all connected to the eight-way water valve 12.

[0128] The input ends of the eight-way water valve 12 include: a first input end 1211 , a second input end 1212 , a third input end 1213 and a fourth input end 1214 .

[0129] The output ends of the eight-way water valve 12 include: a first output end 1221 , a second output end 1222 , a third output end 1223 and a fourth output end 1224 .

[0130] The first end of the first loop is connected to the first output end 1221 of the eight-way water valve 12 , and the second end of the first loop is connected to the first input end 1211 of the eight-way water valve 12 .

[0131] The first end of the second loop is connected to the second output end 1222 of the eight-way water valve 12 , and the second end of the second loop is connected to the second input end 1212 of the eight-way water valve 12 .

[0132] The first end of the third loop is connected to the third output end 1223 of the eight-way water valve 12 , and the second end of the third loop is connected to the third input end 1213 of the eight-way water valve 12 .

[0133] The first end of the fourth loop is connected to the fourth output end 1224 of the eight-way water valve 12 , and the second end of the third loop is connected to the fourth input end 1214 of the eight-way water valve 12 .

[0134] The eight-way water valve 12 controls the flow direction and flow rate of the fluids in the first circuit, the second circuit, the third circuit and the fourth circuit by connecting and switching the input end and the output end.

[0135] In the above configuration, the eight-way water valve 12 plays a key control role, and can flexibly control the fluid flow direction and flow rate of the condenser 2 in the first circuit, the battery module 10 in the second circuit, the motor module 15 in the third circuit, and the cooler 4 in the fourth circuit through the connection and switching of its multiple input and output terminals. This enables the water circuit II system to be dynamically adjusted according to different operating requirements, thereby improving the flexibility and efficiency of the thermal management system.

[0136] Specifically, each input end of the eight-way water valve 12 is connected to the output end of a circuit, and each output end is connected to the input end of a circuit. By adjusting the position of the valve core inside the eight-way water valve 12, the flow path of the fluid between the circuits can be changed, thereby achieving control of the fluid flow direction and flow rate.

[0137] For example, when the flow rate of one of the circuits needs to be increased, the input end of the eight-way water valve 12 connected to the output end of the circuit can be opened, and other unnecessary input ends can be closed to allow more fluid to flow into the circuit. Similarly, when the flow direction of the fluid needs to be changed, it can also be achieved by adjusting the position of the valve core in the eight-way water valve 12.

[0138] In addition, since the eight-way water valve 12 has multiple input ends and output ends, it can also realize parallel or series connection between multiple circuits, further improving the flexibility and adaptability of the system and meeting the operating requirements under different working conditions.

[0139] In this embodiment, Figure 1A As shown, the first circuit includes: a first three-way valve 701 , a first water pump 901 , a condenser 2 and a second three-way proportional valve 802 .

[0140] The input end of the first three-way valve 701 is connected to the first output end 1221 of the eight-way water valve 12, the output end of the first three-way valve 701 is connected to the input end of the first water pump 901, the output end of the first water pump 901 is connected to the second input end of the condenser 2, the second output end of the condenser 2 is connected to the first input end of the second three-way proportional valve 802; the first output end of the second three-way proportional valve 802 is connected to the first input end 1211 of the eight-way water valve 12.

[0141] In the above-mentioned first loop, the first output end 1221 of the eight-way water valve 12 guides part or all of the cooling medium to the first three-way valve 701, and then the first three-way valve 701 transports the cooling medium to the first water pump 901, and the first water pump 901 transports the pressurized cooling medium to the condenser 2 for heat exchange. In the condenser 2, the heat from the refrigerant circuit I is transferred to the cooling medium from the first water pump 901, so that the cooling medium is heated up and takes away the heat. The second output end of the condenser 2 transports the cooling medium that has absorbed the heat to the second three-way proportional valve 802, and the second three-way proportional valve 802 transports the cooling medium that has absorbed the heat to the first input end 1211 of the eight-way water valve 12 to return part of the cooling medium to the eight-way water valve 12 for redistribution; the heat of the cooling medium can be recovered for heating other systems, such as the cockpit or the battery system.

[0142] Through the coordinated work of various components in the first circuit, functions such as circulation of cooling medium, temperature regulation, flow control and system balance are realized, providing important support for the cooling or heating system of the entire thermal management system.

[0143] In this embodiment, Figure 1A As shown, the first circuit also includes: a warm air core 1302 .

[0144] The input end of the heater core 1302 is connected to the second output end of the second three-way proportional valve 802, and the output end of the heater core 1302 is connected to the second input end of the first three-way valve 701. The heater core 1302 is configured to heat the air.

[0145] In the first loop, the cooling medium output from the second three-way proportional valve 802 can be partially delivered to the heater core 1302 through the regulation of the second three-way proportional valve 802, and heat exchange is performed with the air in the heater core 1302, and the heat is transferred to the air, so that the air is heated, and then output from the heater core 1302, and delivered to the first three-way valve 701 and enters the fourth three-way proportional valve 804 together with the cooling medium from the first output end 1221 of the eight-way water valve 12. Through the above arrangement, the water loop II enhances the warm air or heating function.

[0146] In this embodiment, Figure 1A As shown, the first circuit further includes: a sixth temperature sensor 1706 . The sixth temperature sensor 1706 is connected to the input end of the warm air core 1302 , and is connected to the second output end of the second three-way proportional valve 802 .

[0147] In the first loop, the sixth temperature sensor 1706 is introduced to monitor and evaluate the working status of the heating system to ensure the comfort of the passengers in the vehicle and the performance of the heating system.

[0148] In this embodiment, Figure 1A As shown, the second circuit includes: a third three-way valve 703 , a second water pump 902 , a battery module 10 and a fourth three-way valve 704 .

[0149] The first input end of the third three-way valve 703 is connected to the second output end 1222 of the eight-way water valve 12, the output end of the third three-way valve 703 is connected to the input end of the second water pump 902, the output end of the second water pump 902 is connected to the input end of the battery module 10, the output end of the battery module 10 is connected to the input end of the fourth three-way valve 704, and the first output end of the fourth three-way valve 704 is connected to the second input end 1212 of the eight-way water valve 12.

[0150] In the above-mentioned second loop, the second output end 1222 of the eight-way water valve 12 guides part or all of the cooling medium to the third three-way valve 703, and then the third three-way valve 703 transports the cooling medium to the second water pump 902, and the second water pump 902 transports the pressurized cooling medium to the battery module 10. After the cooling medium circulates inside the battery module 10, the cooling medium is transported to the fourth three-way valve 704, and the fourth three-way valve 704 then transports the cooling medium to the second input end 1212 of the eight-way water valve 12, thereby achieving effective cooling or heating of the battery module 10.

[0151] In this embodiment, Figure 1A As shown, the second circuit further includes: a one-way valve 11.

[0152] The input end of the one-way valve 11 is connected to the second output end of the fourth three-way valve 704 , and the output end of the one-way valve 11 is connected to the second input end of the third three-way valve 703 .

[0153] In the above-mentioned second loop, the fourth three-way valve 704 transports the cooling medium after circulating inside the battery module 10 to the one-way valve 11, and then transports the cooling medium to the third three-way valve 703 through the one-way valve 11, and then participates in the circulation of the battery module 10. The one-way valve controls the flow direction of the fluid and prevents the cooling medium from flowing back to the fourth three-way valve 704, thereby protecting other components in the second loop from damage by the reverse flow of the fluid; it can also optimize the cooling or heating effect.

[0154] In this embodiment, Figure 1A As shown, the second circuit further includes: a first temperature sensor 1701 and a second temperature sensor 1702 .

[0155] The first temperature sensor 1701 is connected to the input end of the battery module 10 and to the output end of the second water pump 902. The second temperature sensor 1702 is connected to the output end of the battery module 10 and to the input end of the fourth three-way valve 704.

[0156] In the second loop, the first temperature sensor 1701 and the second temperature sensor 1702 are introduced to accurately monitor the temperature change of the battery module 10 during the charging and discharging process to ensure the safety and performance stability of the battery pack.

[0157] In this embodiment, Figure 1A As shown, the third circuit includes: a fifth three-way valve 705 , a cooling module 14 , a third three-way proportional valve 803 and a motor module 15 .

[0158] The input end of the fifth three-way valve 705 is connected to the third output end 1223 of the eight-way water valve 12, the first output end of the fifth three-way valve 705 is connected to the input end of the cooling module 14, and the second output end of the fifth three-way valve 705 is connected to the second input end of the third three-way proportional valve 803; the output end of the cooling module 14 is connected to the first input end of the third three-way proportional valve 803; the output end of the third three-way proportional valve 803 is connected to the input end of the motor module 15, and the output end of the motor module 15 is connected to the third input end 1213 of the eight-way water valve 12.

[0159] In the third loop, the third output end 1223 of the eight-way water valve 12 guides part or all of the cooling medium to the fifth three-way valve 705, and then the fifth three-way valve 705 delivers a part of the cooling medium to the cooling module 14 for cooling. The cooling module 14 delivers the cooled cooling medium to the third three-way proportional valve 803, and the third three-way proportional valve 803 delivers the cooling medium to the motor module 15 to cool the motor module 15 and take away the generated heat. Then, after the cooling medium is output from the motor module 15, it flows back from the third input end 1213 of the eight-way water valve 12 to the eight-way water valve 12 for redistribution. In addition, the fifth three-way valve 705 directly delivers another part of the cooling medium to the third three-way proportional valve 803, and delivers it to the motor module 15 together with the cooling medium output from the cooling module 14. Through the above arrangement, the circulation and heat exchange of the cooling medium between the motor module 15 and the cooling module 14 are realized.

[0160] In this embodiment, Figure 1AAs shown, the third circuit further includes: a third temperature sensor 1703 and a fourth temperature sensor 1704 .

[0161] The third temperature sensor 1703 is connected to the input end of the motor module 15 and to the output end of the third three-way proportional valve 803. The fourth temperature sensor 1704 is connected to the output end of the motor module 15 and to the third input end 1213 of the eight-way water valve 12.

[0162] In the third loop, the third temperature sensor 1703 and the fourth temperature sensor 1704 are introduced to measure the temperature changes caused by the heat generated during the operation of the motor module 15, so as to adjust the cooling strategy of the motor, optimize the load distribution of the motor, improve the energy conversion efficiency of the motor, etc., thereby further improving the performance and stability of the entire system.

[0163] In this embodiment, Figure 1A As shown, the fourth circuit includes: a second three-way valve 702 , a third water pump 903 , a cooler 4 and a first three-way proportional valve 801 .

[0164] The first input end of the second three-way valve 702 is connected to the fourth output end 1224 of the eight-way water valve 12, the output end of the second three-way valve 702 is connected to the input end of the third water pump 903, the output end of the third water pump 903 is connected to the second input end of the cooler 4, the second output end of the cooler 4 is connected to the input end of the first three-way proportional valve 801, and the first output end of the first three-way proportional valve 801 is connected to the fourth input end 1214 of the eight-way water valve 12.

[0165] In the fourth loop, the fourth output end 1224 of the eight-way water valve 12 guides part or all of the cooling medium to the second three-way valve 702, and then the second three-way valve 702 delivers the cooling medium to the third water pump 903, and the third water pump 903 delivers the pressurized cooling medium to the cooler 4 for heat exchange, and then the cooled medium is output from the cooler 4 and input into the first three-way proportional valve 801, and then the cooling medium output from the first three-way proportional valve 801 flows back from the fourth input end 1214 of the eight-way water valve 12 to the eight-way water valve 12 for redistribution. Through the above arrangement, the circulation flow and temperature control of the cooling medium are achieved through the coordinated work of the eight-way water valve 12, the second three-way valve 702, the third water pump 903, the cooler 4 and the first three-way proportional valve 801.

[0166] In this embodiment, Figure 1AAs shown, the fourth circuit further includes: a cold air core 1301. The input end of the cold air core 1301 is connected to the second output end of the first three-way proportional valve 801, and the output end of the cold air core 1301 is connected to the second input end of the second three-way valve 702. The cold air core 1301 is configured to cool and dehumidify the air.

[0167] In the fourth loop, the cooling medium output from the first three-way proportional valve 801 can be partially delivered to the cold air core 1301 through the regulation of the first three-way proportional valve 801, and heat exchange is performed with the air to be treated, absorbing and taking away the heat in the air, and may also play a role in dehumidification, and then output from the cold air core 1301 and delivered to the second three-way valve 702 and enter the third water pump 903 together with the cooling medium from the fourth output end 1224 of the eight-way water valve 12. Through the above settings, the water loop II not only enhances the cooling capacity, but also increases the regulation function of the air environment.

[0168] In this embodiment, Figure 1A As shown, the fourth circuit further includes: a fifth temperature sensor 1705 . The fifth temperature sensor 1705 is connected to the input end of the cold air core 1301 , and is connected to the second output end of the first three-way proportional valve 801 .

[0169] In the fifth loop, the fifth temperature sensor 1705 is introduced to accurately monitor the temperature at the input end of the cold air core 1301, thereby more effectively evaluating and adjusting the performance of the entire cooling system.

[0170] In this embodiment, Figure 1A As shown, the water circuit II also includes: a fifth circuit. The fifth circuit includes: a fourth three-way proportional valve 804, a condenser 2, a cooler 4, a sixth three-way valve 706, a seventh three-way valve 707, a first water pump 901, an eighth three-way valve 708 and a stop valve 16.

[0171] The output end of the fourth three-way proportional valve 804 is connected to the input end of the first water pump 901, the output end of the first water pump 901 is connected to the second input end of the condenser 2, the second output end of the condenser 2 is connected to the input end of the sixth three-way valve 706, the first output end of the sixth three-way valve 706 is connected to the input end of the stop valve 16, the output end of the stop valve 16 is connected to the first input end of the seventh three-way valve 707, the output end of the seventh three-way valve 707 is connected to the second input end of the cooler 4, the second output end of the cooler 4 is connected to the input end of the eighth three-way valve 708; the first output end of the eighth three-way valve 708 is connected to the first input end of the fourth three-way proportional valve 804.

[0172] In the above-mentioned fifth loop, a part of the cooling medium output from the eighth three-way valve 708 is input to the fourth three-way proportional valve 804, and a part of it can be transported to the first water pump 901 through the adjustment of the fourth three-way proportional valve 804. The first water pump 901 transports the pressurized cooling medium to the condenser 2 for heat exchange, and then the cooled medium is output from the condenser 2 and input into the sixth three-way valve 706, and then after being output from the sixth three-way valve 706, part of the cooling medium is input into the stop valve 16, and then after being output from the stop valve 16, the cooling medium is input into the seventh three-way valve 707, and then output from the seventh three-way valve 707 and input into the cooler 4 for heat exchange, and then the cooled medium is output from the cooler 4 and input into the eighth three-way valve 708 to form a circulation loop. Through the above-mentioned settings, by controlling the fourth three-way proportional valve 804, the eighth three-way valve 708 and the stop valve 16, it is possible to increase the intake pressure and refrigerant flow of the electric compressor 1 in an ultra-low temperature environment (<-20°C), ensure that the thermal system provides normal heating performance at low temperatures, and enable the thermal management system to operate stably in an ultra-low temperature environment (<-20°C).

[0173] In this embodiment, Figure 1A As shown, the refrigerant circuit I also includes: a first temperature and pressure sensor 1801 and a second temperature and pressure sensor 1802.

[0174] The first temperature and pressure sensor 1801 is connected to the output end of the compressor 1 and to the first input end of the condenser 2. The second temperature and pressure sensor 1802 is connected to the input end of the compressor 1 and to the output end of the liquid storage tank 5 and / or the gas-liquid separator 6.

[0175] In the refrigerant circuit I, the introduction of the first temperature and pressure sensor 1801 and the second temperature and pressure sensor 1802 can monitor and measure the temperature and pressure of the input and output ends of the compressor 1 in real time, thereby ensuring the stable operation and high efficiency performance of the refrigerant system.

[0176] In this embodiment, the refrigerant includes propane.

[0177] It is understandable that propane has a high latent heat of evaporation and can absorb a large amount of heat during the evaporation process, thereby effectively achieving a cooling effect. At the same time, its condensation process can also release a lot of heat, which is helpful for the heating process. When used in the above-mentioned thermal management system, it can achieve the replacement application of low global warming potential refrigerants.

[0178] In addition, the above Figure 1A The connection relationship of each component in the figure is only an exemplary description. The positions of each component on the same circuit can also be exchanged, and it is not limited to Figure 1A The connection relationship indicated.

[0179] For example, Figure 1B As shown, the fifth loop can be cancelled according to the actual usage scenario.

[0180] For example, Figure 1D As shown, a rear HVAC (all components related to the heating, ventilation and air conditioning system) assembly can be added according to the needs of the application vehicle to achieve dual air conditioning functions.

[0181] For example, Figure 1C As shown, the thermal management system may also include a water heating PTC, which is arranged between the sixth three-way valve 706 and the second three-way proportional valve 802; when the water temperature does not reach the target temperature, the water heating PTC is used to heat the coolant flowing through it, so that the cooling medium flowing to the heater core 1302 (or the second circuit) has a higher temperature, thereby helping to improve the heating effect of the passenger compartment (or the second circuit). If the water temperature reaches the target temperature, the water heating PTC can be directly turned off.

[0182] Based on the connection architecture scheme of the above refrigerant circuit I and water circuit II, they can be combined to cover the layout requirements of the thermal system of different models; based on user needs, single battery cooling, single passenger compartment cooling, motor cooling, battery heating, passenger compartment heating and other single functions or combined functions can be realized through control strategies. The following introduces some of the working modes that the thermal management system can achieve.

[0183] In this embodiment, the operation mode of the thermal management system includes a single passenger compartment cooling mode, such as Figure 2 As shown, Figure 2 A schematic diagram of the connectivity of a thermal management system in a passenger compartment single cooling mode provided by the present invention. When the thermal management system is in a single passenger compartment cooling mode, the first input end 1211 and the third output end 1223 of the eight-way water valve are connected, and the third input end 1213 and the first output end 1221 of the eight-way water valve are connected.

[0184] In this mode, when the compressor 1 is working, the refrigerant circuit I, the condenser 2 releases heat to the water circuit II, and the cooler 4 absorbs heat from the water circuit II; in the water circuit II, the first input end 1211 of the eight-way water valve is connected to the third output end 1223, and the third input end 1213 of the eight-way water valve is connected to the first output end 1221, and the heat released by the condenser 2 is discharged into the outside air through the cooling module 14; the cooling medium (such as cold water) after being cooled by the cooler 4 is adjusted by the first three-way proportional valve 801 and all passes through the cold air core 1301 to cool the air flow passing through, providing cold air for the passenger compartment. By controlling the speed of the compressor 1 and the speed of the third water pump 903, the passenger compartment is provided with cold capacity as needed.

[0185] In this embodiment, the operation mode of the thermal management system also includes a single battery cooling mode, such as Figure 3 As shown, Figure 3 A schematic diagram of the connectivity relationship of the thermal management system in a battery single cooling mode provided by the present invention, when the thermal management system is in the single battery cooling mode, the first input end 1211 and the third output end 1223 of the eight-way water valve 12 are connected, the second input end 1212 and the fourth output end 1224 of the eight-way water valve 12 are connected, the third input end 1213 and the first output end 1221 of the eight-way water valve 12 are connected, and the fourth input end 1214 and the second output end 1222 of the eight-way water valve are connected.

[0186] In this mode, when the compressor 1 is working, the refrigerant circuit I releases heat from the condenser 2 to the water circuit II, and the cooler 4 absorbs heat from the water circuit II; the first input end 1211 and the third output end 1223 of the eight-way water valve 12 in the water circuit II are connected, the second input end 1212 and the fourth output end 1224 of the eight-way water valve 12 are connected, the third input end 1213 and the first output end 1221 of the eight-way water valve 12 are connected, and the fourth input end 1214 and the second output end 1222 of the eight-way water valve are connected, and the heat released by the condenser 2 is discharged into the outside air through the cooling module 14; and the cold water after being cooled by the cooler 4 is adjusted by the first three-way proportional valve 801 to enter the second circuit to cool the battery module 10. By controlling the speed of the compressor 1 and the speed of the third water pump 903, the battery module 10 is provided with cold capacity as needed.

[0187] In this embodiment, the operation mode of the thermal management system also includes a passenger compartment and battery cooling mode, such as Figure 4 As shown, Figure 4 A schematic diagram of the connectivity relationship of a thermal management system in a mode in which a passenger compartment and a battery are cooled simultaneously provided by the present invention. When the thermal management system is in a mode in which a passenger compartment and a battery are cooled simultaneously, the first input end 1211 and the third output end 1223 of the eight-way water valve 12 are connected, the second input end 1212 and the fourth output end 1224 of the eight-way water valve 12 are connected, the third input end 1213 and the first output end 1221 of the eight-way water valve 12 are connected, and the fourth input end 1214 and the second output end 1222 of the eight-way water valve 12 are connected.

[0188] In this mode, when the compressor 1 is working, the refrigerant circuit I releases heat from the condenser 2 to the water circuit II, and the cooler 4 absorbs heat from the water circuit II; the first input end 1211 and the third output end 1223 of the eight-way water valve 12 are connected, the second input end 1212 and the fourth output end 1224 of the eight-way water valve 12 are connected, the third input end 1213 and the first output end 1221 of the eight-way water valve 12 are connected, and the fourth input end 1214 and the second output end 1222 of the eight-way water valve 12 are connected, and the heat released by the condenser 2 is discharged into the outside air through the cooling module 14; and the cold water after cooling by the cooler 4 flows into the first three-way proportional valve 801, and the first three-way proportional valve 801 distributes the flow as needed, and part of the cold water enters the cold air core 1301 to cool the air flow passing through, providing cold air for the passenger compartment; part of the cold water enters the second circuit to cool the battery module 10. By controlling the speed of compressor 1 and the speed of the third water pump 903, sufficient cooling capacity is provided to the system on demand; the first three-way proportional valve 801 plays the role of allocating cooling capacity on demand; in the scenario where the distribution flow on the battery side is low, the uniformity of the battery temperature is adjusted by turning on (or increasing) the speed of the second water pump 902.

[0189] In this embodiment, the operation mode of the thermal management system also includes a battery natural cooling mode, such as Figure 5 As shown, Figure 5 A schematic diagram of the connectivity relationship of a thermal management system in a battery natural cooling mode provided by the present invention. When the thermal management system is in the battery natural cooling mode, the first input end 1211 and the second output end 1222 of the eight-way water valve 12 are connected, the second input end 1212 and the fourth output end 1224 of the eight-way water valve 12 are connected, the third input end 1213 and the first output end 1221 of the eight-way water valve 12 are connected, and the fourth input end 1214 and the third output end 1223 of the eight-way water valve are connected.

[0190] In this mode, the compressor 1 of the refrigerant circuit I does not work; the first input end 1211 and the second output end 1222 of the eight-way water valve 12 in the water circuit II are connected, the second input end 1212 and the fourth output end 1224 of the eight-way water valve 12 are connected, the third input end 1213 and the first output end 1221 of the eight-way water valve 12 are connected, and the fourth input end 1214 and the third output end 1223 of the eight-way water valve are connected, thereby realizing the connection of all water circuits II between the first circuit, the second circuit, the third circuit and the fourth circuit; the heat generated by the second circuit is discharged into the air through the cooling module 14; the battery thermal management requirements are met by adjusting the second water pump 902 and the cooling module 14.

[0191] In this embodiment, the operation mode of the thermal management system also includes a motor cooling mode, such as Figure 6 As shown, Figure 6A schematic diagram of the connectivity relationship of a thermal management system in a motor natural cooling mode provided by the present invention, when the thermal management system is in a motor separate cooling mode, the first input end 1211 and the third output end 1223 of the eight-way water valve 12 are connected, and the third input end 1213 and the first output end 1221 of the eight-way water valve 12 are connected.

[0192] In this mode, the compressor 1 of the refrigerant circuit I does not work; in the water circuit II, the first input end 1211 and the third output end 1223 of the eight-way water valve 12 are connected, and the third input end 1213 and the first output end 1221 of the eight-way water valve 12 are connected, so that the third circuit and the first circuit are connected; the heat generated by the motor module 15 is discharged into the air through the cooling module 14; the electric drive thermal management requirements are met by adjusting the speed of the first water pump 901 and the cooling module 14.

[0193] In this embodiment, the operation mode of the thermal management system also includes a single passenger compartment heating mode, such as Figure 7 As shown, Figure 7 A schematic diagram of the connectivity of a thermal management system in a single passenger compartment heating mode provided by the present invention. When the thermal management system is in the single passenger compartment heating mode, the third input end 1213 and the fourth output end 1224 of the eight-way water valve 12 are connected, and the fourth input end 1214 and the third output end 1223 of the eight-way water valve 12 are connected.

[0194] In this mode, when the compressor 1 is working, the refrigerant circuit I releases heat to the water circuit II by the condenser 2, and the cooler 4 absorbs heat from the water circuit II; in the water circuit II, the third input end 1213 of the eight-way water valve 12 is connected to the fourth output end 1224, and the fourth input end 1214 of the eight-way water valve 12 is connected to the third output end 1223, so that the third circuit is connected to the fourth circuit, and the second circuit is connected to the first circuit; the low-temperature cooling water after absorbing heat by the cooler 4 enters the cooling module 14 to absorb the heat of the air, and then enters the motor module 15 (or the electric drive oil cooler) to absorb the residual heat of the electric drive, and finally returns to the cooler 4 to heat the refrigerant system; the high-temperature cooling water heated by the water-cooled condenser 2 is all distributed to the heater core 1302 through the second three-way proportional valve 802, and heat is exchanged with the air flow passing through to provide heating for the passenger compartment; the cooling water after heat exchange and cooling returns to the condenser 2 for heating. By controlling the speed of the compressor 1 and the speed of the water pump, heat is provided to the passenger compartment on demand. It should be noted that when there is excess heat provided by the high-temperature side of the thermal management system, the speed of compressor 1 can be reduced preferentially to reduce heat absorption from the low-temperature side; when there is still surplus heat even after it is reduced to the lowest speed and the battery temperature is not high, the opening ratio of the second three-way proportional valve 802 can be adjusted to release some of the excess heat to the battery.

[0195] In this embodiment, the operation mode of the thermal management system also includes a passenger compartment heating and dehumidification mode, such as Figure 8 As shown, Figure 8 A schematic diagram of the connectivity of a thermal management system in a passenger compartment heating and dehumidification mode provided by the present invention. When the thermal management system is in the passenger compartment heating and dehumidification mode, the third input end 1213 and the fourth output end 1224 of the eight-way water valve 12 are connected, and the fourth input end 1214 and the third output end 1223 of the eight-way water valve 12 are connected.

[0196] In this mode, when the compressor 1 is working, the condenser 2 releases heat to the water circuit II of the refrigerant circuit I, and the cooler 4 absorbs heat from the water circuit II; the third input end 1213 and the fourth output end 1224 of the eight-way water valve 12 in the water circuit II are connected, and the fourth input end 1214 and the third output end 1223 of the eight-way water valve 12 are connected, so that the third circuit is connected to the fourth circuit; the low-temperature cooling water after absorbing heat by the cooler 4 enters the first three-way proportional valve 801, and is distributed by the first three-way proportional valve 801. Part of the low-temperature condensed water enters the cooling module 14 to absorb air heat, and then enters the motor module 15 (or electric drive oil cooler) to absorb electric drive waste heat, and finally returns to the cooler 4 to provide heat for the refrigerant system; another part of the low-temperature cooling water enters the cold air core 1301 to cool and dehumidify the air flowing through it, and then enters the main circuit through the second three-way valve 702 and returns to the cooler 4. The cooling water heated by the condenser 2 is all distributed to the heater core 1302 through the second three-way proportional valve 802, and exchanges heat with the airflow passing through it to provide heating for the passenger compartment; the cooling water after heat exchange and cooling returns to the condenser 2 for heating. By controlling the speed of the compressor 1 and the speed of the water pump, heat is provided to the passenger compartment on demand. It should be noted that when there is excess heat provided by the high-temperature side of the thermal management system, the speed of the compressor 1 can be reduced first to reduce heat absorption from the low-temperature side; when there is still excess heat even at the lowest speed and the battery temperature is not high, the opening ratio of the second three-way proportional valve 802 can be adjusted to apply some of the excess heat to the battery.

[0197] In this embodiment, the operation mode of the thermal management system also includes a single battery heating mode, such as Fig. 9 As shown, Fig. 9 A schematic diagram of the connectivity relationship of a thermal management system in a battery-only heating mode provided by the present invention, in which, when the thermal management system is in a single-battery heating mode, the first input end 1211 and the second output end 1222 of the eight-way water valve 12 are connected, and the second input end 1212 and the first output end 1221 of the eight-way water valve 12 are connected, the third input end 1213 and the fourth output end 1224 of the eight-way water valve 12 are connected, and the fourth input end 1214 and the third output end 1223 of the eight-way water valve 12 are connected.

[0198] In this mode, when the compressor 1 is working, the refrigerant circuit I releases heat to the water circuit II by the condenser 2, and the cooler 4 absorbs heat from the water circuit II; the first input end 1211 and the second output end 1222 of the eight-way water valve 12 are connected, and the second input end 1212 and the first output end 1221 of the eight-way water valve 12 are connected, the third input end 1213 and the fourth output end 1224 of the eight-way water valve 12 are connected, and the fourth input end 1214 and the third output end 1223 of the eight-way water valve 12 are connected. The third circuit is connected with the fourth circuit, and the second circuit is connected with the first circuit; the low-temperature cooling water after absorbing heat in the cooler 4 enters the cooling module 14 to absorb the heat of the air, and then enters the motor module 15 (or the electric drive oil cooler) to absorb the waste heat of the electric drive, and finally returns to the cooler 4 to heat the refrigerant system; the high-temperature cooling water heated by the water-cooled condenser 2 is all distributed to the second circuit through the second three-way proportional valve 802, and exchanges heat with the battery module 10; the cooling water after heat exchange and cooling returns to the water-cooled condenser 2 for heating. By controlling the speed of the compressor 1 and the speed of the second water pump 902, heat is provided to the battery module 10 on demand. It should be noted that the speed of the compressor 1 is adjusted according to the target water temperature. When the water temperature reaches the target water temperature, the compressor 1 stops running.

[0199] In this embodiment, the operation mode of the thermal management system also includes a mode of heating the passenger compartment and the battery simultaneously, such as Fig.10 As shown, Fig.10 A schematic diagram of the connectivity relationship of a thermal management system in a mode in which a passenger compartment and a battery are heated simultaneously provided by the present invention. When the thermal management system is in a mode in which a passenger compartment and a battery are heated simultaneously, the first input end 1211 and the second output end 1222 of the eight-way water valve 12 are connected, and the second input end 1212 and the first output end 1221 of the eight-way water valve 12 are connected, the third input end 1213 and the fourth output end 1224 of the eight-way water valve 12 are connected, and the fourth input end 1214 and the third output end 1223 of the eight-way water valve 12 are connected.

[0200] In this mode, when the compressor 1 is working, the refrigerant circuit I releases heat from the condenser 2 to the water circuit II, and the cooler 4 absorbs heat from the water circuit II. In the water circuit II, the first input end 1211 and the second output end 1222 of the eight-way water valve 12 are connected, and the second input end 1212 and the first output end 1221 of the eight-way water valve 12 are connected, the third input end 1213 and the fourth output end 1224 of the eight-way water valve 12 are connected, and the fourth input end 1214 and the third output end 1223 of the eight-way water valve 12 are connected, so that the third circuit is connected to the fourth circuit, and the second circuit is connected to the first circuit. After absorbing heat from the cooler 4, the low-temperature cooling water enters the cooling module 14 to absorb the heat from the air, then enters the motor module 15 (or the electric drive oil cooler) to absorb the waste heat from the electric drive, and finally returns to the cooler 4 to heat the refrigerant system; after the high-temperature cooling water is heated by the condenser 2, a portion of it is distributed to the heater core 1302 through the second three-way proportional valve 802, and heat is exchanged with the air flow passing through it to provide heating for the passenger compartment; the other portion is distributed to the second circuit through the second three-way proportional valve 802 to exchange heat with the battery module 10; the two portions of cooling water after heat exchange and cooling are merged into the first three-way valve 701 and then returned to the condenser 2 for heating. By controlling the speed of the compressor 1 and the speed of the second water pump 902, heat is provided to the passenger compartment and the battery as needed. It should be noted that by adjusting the opening ratio of the second three-way proportional valve 802, the heat is reasonably distributed as needed; in the early stage of the operation of the thermal system (or when the heat provided is insufficient), priority is given to meeting the needs of the passenger compartment.

[0201] In this embodiment, the operation mode of the thermal management system also includes a hot water bypass single passenger compartment heating mode, such as Fig.11 As shown, Fig.11 A schematic diagram of the connectivity relationship of a thermal management system in a hot water bypass single passenger compartment heating mode provided by the present invention. When the thermal management system is in the hot water bypass single passenger compartment heating mode, the first input end 1211 and the second output end 1222 of the eight-way water valve 12 are connected, and the second input end 1212 and the first output end 1221 of the eight-way water valve 12 are connected, the third input end 1213 and the fourth output end 1224 of the eight-way water valve 12 are connected, and the fourth input end 1214 and the third output end 1223 of the eight-way water valve 12 are connected.

[0202] In this mode, when the compressor 1 is working, the water-cooled condenser 2 of the refrigerant circuit I releases heat to the water circuit II, and the cooler 4 absorbs heat from the water circuit II; in the water circuit II, the first input end 1211 and the second output end 1222 of the eight-way water valve 12 are connected, and the second input end 1212 and the first output end 1221 of the eight-way water valve 12 are connected, the third input end 1213 and the fourth output end 1224 of the eight-way water valve 12 are connected, and the fourth input end 1214 and the third output end 1223 of the eight-way water valve 12 are connected, so that the third circuit is connected to the fourth circuit, and the second circuit is connected to the first circuit. In an ultra-low temperature environment, when the water circuit II of cooler 4 cannot absorb heat from the air (or motor module 15), the third water pump 903 does not work; the opening of the fourth three-way proportional valve 804 is adjusted to allow part of the high-temperature cooling water passing through the condenser 2 to enter the cooler 4 and exchange heat with the refrigerant side to ensure the normal and stable operation of the refrigerant system; the other part of the high-temperature cooling water is all distributed to the heater core 1302 through the second three-way proportional valve 802, and exchanges heat with the air flow passing through it to provide heating for the passenger compartment; the cooling water after heat exchange and cooling returns to the condenser 2 for heating. When the fourth circuit can absorb less heat from the air (or electric drive), the third water pump 903 works at a lower speed; adjust the opening of the fourth three-way proportional valve 804 so that part of the high-temperature cooling water passing through the condenser 2 passes through the sixth three-way valve 706, and enters the low-temperature water circuit II at the seventh three-way valve 707 and enters the cooler 4, exchanging heat with the refrigerant side to ensure the normal and stable operation of the refrigerant system; the other part of the high-temperature cooling water is all distributed to the warm air core 1302 through the second three-way proportional valve 802, and exchanges heat with the air flow passing through to provide heating for the passenger compartment; the cooling water after heat exchange and cooling returns to the condenser 2 for heating; the low-temperature cooling water after absorbing heat in the cooler 4 enters the cooling module 14 to absorb air heat, then enters the motor module 15 (or electric drive oil cooler) to absorb electric drive waste heat, and finally returns to the cooler 4 to heat the refrigerant system. By controlling the speed of the compressor 1 and the speed of the first water pump 901, heat is provided to the passenger compartment on demand. It should be noted that, with regard to the control of the fourth three-way proportional valve 804, the outlet end of the fourth three-way proportional valve 804 is closed when the thermal management system is started to ensure that the refrigerant system starts quickly and stably; when the pressure of the thermal management system reaches a normal level, the opening ratio of the outlet end of the fourth three-way proportional valve 804 is gradually adjusted to enable it to supply heat to the warm air core 1302.

[0203] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or change made by a person skilled in the art based on the present invention is within the protection scope of the present invention.

Claims

1. A thermal management system, characterized in that: The thermal management system comprises: a refrigerant circuit (I) and a water circuit (II); The refrigerant circuit (I) comprises: a compressor (1), a condenser (2), a first valve (3), a cooler (4), and also comprises a liquid storage tank (5) and a gas-liquid separator (6); The output end of the compressor (1) is connected to the first input end of the condenser (2), the first output end of the condenser (2) is connected to the input end of the first valve (3), the output end of the first valve (3) is connected to the first input end of the cooler (4), and the first output end of the cooler (4) is connected to the input end of the compressor (1); When the refrigerant circuit (I) includes a liquid storage tank (5), the input end of the liquid storage tank (5) is connected to the first output end of the condenser (2), and the output end of the liquid storage tank (5) is connected to the input end of the first valve (3); When the refrigerant circuit (I) includes a gas-liquid separator (6), the input end of the gas-liquid separator (6) is connected to the first output end of the cooler (4), and the output end of the gas-liquid separator (6) is connected to the input end of the compressor (1); The refrigerant circuit (I) is configured to circulate refrigerant, absorb or release heat, and achieve cooling or heating; The water circuit (II) comprises a plurality of circuits, at least some of which comprise the condenser (2) and / or the cooler (4); the water circuit is configured to transfer heat and adjust temperature.

2. The thermal management system according to claim 1, characterized in that: The water circuit (II) comprises: a first circuit, a second circuit, a third circuit and a fourth circuit; the first circuit, the second circuit, the third circuit and the fourth circuit are all connected to the eight-way water valve (12); The input ends of the eight-way water valve (12) include: a first input end (1211), a second input end (1212), a third input end (1213) and a fourth input end (1214); The output ends of the eight-way water valve (12) include: a first output end (1221), a second output end (1222), a third output end (1223) and a fourth output end (1224); The first end of the first loop is connected to the first output end (1221) of the eight-way water valve (12), and the second end of the first loop is connected to the first input end (1211) of the eight-way water valve (12); The first end of the second loop is connected to the second output end (1222) of the eight-way water valve (12), and the second end of the second loop is connected to the second input end (1212) of the eight-way water valve (12); The first end of the third loop is connected to the third output end (1223) of the eight-way water valve (12), and the second end of the third loop is connected to the third input end (1213) of the eight-way water valve (12); The first end of the fourth loop is connected to the fourth output end (1224) of the eight-way water valve (12), and the second end of the third loop is connected to the fourth input end (1214) of the eight-way water valve (12); The eight-way water valve (12) controls the flow direction and flow rate of the fluids in the first circuit, the second circuit, the third circuit and the fourth circuit by connecting and switching the input end and the output end.

3. The thermal management system according to claim 2, characterized in that: The first circuit comprises: a first three-way valve (701), a first water pump (901), the condenser (2) and a second three-way proportional valve (802); The input end of the first three-way valve (701) is connected to the first output end (1221) of the eight-way water valve (12); the output end of the first three-way valve (701) is connected to the input end of the first water pump (901); the output end of the first water pump (901) is connected to the second input end of the condenser (2); the second output end of the condenser (2) is connected to the first input end of the second three-way proportional valve (802); and the first output end of the second three-way proportional valve (802) is connected to the first input end (1211) of the eight-way water valve (12).

4. The thermal management system according to claim 3, characterized in that: The first circuit also includes: a warm air core (1302); The input end of the warm air core (1302) is connected to the second output end of the second three-way proportional valve (802), and the output end of the warm air core (1302) is connected to the second input end of the first three-way valve (701); The warm air core 1302 is configured to heat the air.

5. The thermal management system according to claim 4, characterized in that: The first circuit also includes: a sixth temperature sensor (1706); The sixth temperature sensor (1706) is connected to the input end of the warm air core (1302) and to the second output end of the second three-way proportional valve (802).

6. The thermal management system according to claim 2, characterized in that: The second circuit comprises: a third three-way valve (703), a second water pump (902), a battery module (10) and a fourth three-way valve (704); The first input end of the third three-way valve (703) is connected to the second output end (1222) of the eight-way water valve (12), the output end of the third three-way valve (703) is connected to the input end of the second water pump (902), the output end of the second water pump (902) is connected to the input end of the battery module (10), the output end of the battery module (10) is connected to the input end of the fourth three-way valve (704), and the first output end of the fourth three-way valve (704) is connected to the second input end (1212) of the eight-way water valve (12).

7. The thermal management system according to claim 6, characterized in that: The second circuit also includes: a one-way valve (11); The input end of the one-way valve (11) is connected to the second output end of the fourth three-way valve (704), and the output end of the one-way valve (11) is connected to the second input end of the third three-way valve (703).

8. The thermal management system according to claim 6, characterized in that: The second circuit further comprises: a first temperature sensor (1701) and a second temperature sensor (1702); The first temperature sensor (1701) is connected to an input end of the battery module (10), and is connected to an output end of the second water pump (902); The second temperature sensor (1702) is connected to the output end of the battery module (10) and to the input end of the fourth three-way valve (704).

9. The thermal management system according to claim 2, characterized in that: The third circuit comprises: a fifth three-way valve (705), a cooling module (14), a third three-way proportional valve (803) and a motor module (15); The input end of the fifth three-way valve (705) is connected to the third output end (1223) of the eight-way water valve (12); the first output end of the fifth three-way valve (705) is connected to the input end of the cooling module (14); the second output end of the fifth three-way valve (705) is connected to the second input end of the third three-way proportional valve (803); the output end of the cooling module (14) is connected to the first input end of the third three-way proportional valve (803); the output end of the third three-way proportional valve (803) is connected to the input end of the motor module (15); and the output end of the motor module (15) is connected to the third input end (1213) of the eight-way water valve (12).

10. The thermal management system according to claim 9, characterized in that: The third circuit further includes: a third temperature sensor (1703) and a fourth temperature sensor (1704); The third temperature sensor (1703) is connected to the input end of the motor module (15), and is connected to the output end of the third three-way proportional valve (803); The fourth temperature sensor (1704) is connected to the output end of the motor module (15), and is connected to the third input end (1213) of the eight-way water valve (12).

11. The thermal management system according to claim 2, characterized in that: The fourth circuit comprises: a second three-way valve (702), a third water pump (903), a cooler (4) and a first three-way proportional valve (801); The first input end of the second three-way valve (702) is connected to the fourth output end (1224) of the eight-way water valve (12), the output end of the second three-way valve (702) is connected to the input end of the third water pump (903), the output end of the third water pump (903) is connected to the second input end of the cooler (4), the second output end of the cooler (4) is connected to the input end of the first three-way proportional valve (801), and the first output end of the first three-way proportional valve (801) is connected to the fourth input end (1214) of the eight-way water valve (12).

12. The thermal management system according to claim 11, characterized in that: The fourth circuit also includes: a cold air core (1301); The input end of the cold air core (1301) is connected to the second output end of the first three-way proportional valve (801), and the output end of the cold air core (1301) is connected to the second input end of the second three-way valve (702); The cold air core (1301) is configured to cool and dehumidify the air.

13. The thermal management system according to claim 12, characterized in that: The fourth circuit also includes: a fifth temperature sensor (1705); The fifth temperature sensor (1705) is connected to the input end of the cold air core (1301), and is connected to the second output end of the first three-way proportional valve (801).

14. The thermal management system according to claim 2, characterized in that: The water circuit (II) further comprises: a fifth circuit; the fifth circuit comprises: the fourth three-way proportional valve (804), the condenser (2), the cooler (4), the sixth three-way valve (706), the seventh three-way valve (707), the first water pump (901), the eighth three-way valve (708) and the stop valve (16); The output end of the fourth three-way proportional valve (804) is connected to the input end of the first water pump (901), the output end of the first water pump (901) is connected to the second input end of the condenser (2), the second output end of the condenser (2) is connected to the input end of the sixth three-way valve (706), the first output end of the sixth three-way valve (706) is connected to the input end of the stop valve (16), the output end of the stop valve (16) is connected to the first input end of the seventh three-way valve (707), the output end of the seventh three-way valve (707) is connected to the second input end of the cooler (4), the second output end of the cooler (4) is connected to the input end of the eighth three-way valve (708), and the first output end of the eighth three-way valve (708) is connected to the first input end of the fourth three-way proportional valve (804).

15. The thermal management system according to any one of claims 1 to 14, characterized in that: The refrigerant circuit (I) further comprises: a first temperature and pressure sensor (1801) and a second temperature and pressure sensor (1802); The first temperature and pressure sensor (1801) is connected to the output end of the compressor (1) and to the first input end of the condenser (2); The second temperature and pressure sensor (1802) is connected to the input end of the compressor (1), and is connected to the output end of the liquid storage tank (5) and / or the gas-liquid separator (6).

16. The thermal management system according to claim 15, characterized in that: The refrigerant includes propane.

17. The thermal management system according to claim 16, characterized in that: The thermal management system comprises an eight-way water valve (12); the operating mode of the thermal management system comprises a single passenger compartment cooling mode, and when the thermal management system is in the single passenger compartment cooling mode, the first input end (1211) and the third output end (1223) of the eight-way water valve (12) are in communication, and the third input end (1213) and the first output end (1221) of the eight-way water valve (12) are in communication; and / or, The operation mode of the thermal management system further includes a single-battery cooling mode, wherein when the thermal management system is in the single-battery cooling mode, the first input end (1211) and the third output end (1223) of the eight-way water valve (12) are connected, the second input end (1212) and the fourth output end (1224) of the eight-way water valve (12) are connected, the third input end (1213) and the first output end (1221) of the eight-way water valve (12) are connected, and the fourth input end (1214) and the second output end (1222) of the eight-way water valve (12) are connected; and / or, The operation mode of the thermal management system also includes a passenger compartment and battery simultaneous cooling mode, when the thermal management system is in the passenger compartment and battery simultaneous cooling mode, the first input end (1211) and the third output end (1223) of the eight-way water valve (12) are connected, the second input end (1212) and the fourth output end (1224) of the eight-way water valve (12) are connected, the third input end (1213) and the first output end (1221) of the eight-way water valve (12) are connected, and the fourth input end (1214) and the second output end (1222) of the eight-way water valve (12) are connected; and / or, The operation mode of the thermal management system further includes a battery natural cooling mode. When the thermal management system is in the battery natural cooling mode, the first input end (1211) and the second output end (1222) of the eight-way water valve (12) are connected, the second input end (1212) and the fourth output end (1224) of the eight-way water valve (12) are connected, the third input end (1213) and the first output end (1221) of the eight-way water valve (12) are connected, and the fourth input end (1214) and the third output end (1223) of the eight-way water valve (12) are connected; and / or, The operation mode of the thermal management system further includes a motor-only cooling mode, wherein when the thermal management system is in the motor-only cooling mode, the first input end (1211) and the third output end (1223) of the eight-way water valve (12) are in communication, and the third input end (1213) and the first output end (1221) of the eight-way water valve (12) are in communication; and / or, The operation mode of the thermal management system further includes a single passenger compartment heating mode, and when the thermal management system is in the single passenger compartment heating mode, the third input end (1213) and the fourth output end (1224) of the eight-way water valve (12) are connected, and the fourth input end (1214) and the third output end (1223) of the eight-way water valve (12) are connected; and / or, The operation mode of the thermal management system further includes a passenger compartment heating and dehumidification mode, and when the thermal management system is in the passenger compartment heating and dehumidification mode, the third input end (1213) and the fourth output end (1224) of the eight-way water valve (12) are connected, and the fourth input end (1214) and the third output end (1223) of the eight-way water valve (12) are connected, and / or, The operation mode of the thermal management system further includes a single battery heating mode, when the thermal management system is in the single battery heating mode, the first input end (1211) and the second output end (1222) of the eight-way water valve (12) are connected, and the second input end (1212) and the first output end (1221) of the eight-way water valve (12) are connected, the third input end (1213) and the fourth output end (1224) of the eight-way water valve (12) are connected, and the fourth input end (1214) and the third output end (1223) of the eight-way water valve (12) are connected; and / or, The operation mode of the thermal management system further includes a passenger compartment and battery simultaneous heating mode, wherein when the thermal management system is in the passenger compartment and battery simultaneous heating mode, the first input end (1211) and the second output end (1222) of the eight-way water valve (12) are in communication, and the second input end (1212) and the first output end (1221) of the eight-way water valve (12) are in communication, and the third input end (1213) and the fourth output end (1224) of the eight-way water valve (12) are in communication, and the fourth input end (1214) and the third output end (1223) of the eight-way water valve (12) are in communication; and / or, The operation mode of the thermal management system also includes a hot water bypass single passenger compartment heating mode. When the thermal management system is in the hot water bypass single passenger compartment heating mode, the first input end (1211) and the second output end (1222) of the eight-way water valve (12) are connected, and the second input end (1212) and the first output end (1221) of the eight-way water valve (12) are connected, the third input end (1213) and the fourth output end (1224) of the eight-way water valve (12) are connected, and the fourth input end (1214) and the third output end (1223) of the eight-way water valve (12) are connected.

18. A car, characterized in that: The thermal management system comprises the thermal management system as claimed in any one of claims 1 to 17.

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