Thermal management system, air conditioning system and vehicle

Abstract

This application discloses a thermal management system, an air conditioning system, and a vehicle. The thermal management system includes a temperature regulation loop and a heat exchange loop. The temperature regulation loop includes a compressor, a first plate heat exchanger assembly, a first expansion valve, and a second plate heat exchanger assembly. The output end of the compressor is connected to the input end of the first plate heat exchanger assembly. The first expansion valve is connected between the output end of the first plate heat exchanger assembly and the input end of the second plate heat exchanger assembly. The output end of the second plate heat exchanger assembly is connected to the input end of the compressor. At least one of the first and second plate heat exchanger assemblies includes at least two plate heat exchangers connected in parallel. The heat exchange loop is connected to at least two plate heat exchangers and is adapted to exchange heat with at least two plate heat exchangers. The thermal management system provided in this application can accurately control the output cooling or heating capacity and is suitable for temperature regulation in a smart cockpit.

Description

Technical Field

[0001] This application relates to the field of thermal management technology, and more particularly to a thermal management system, an air conditioning system, and a vehicle. Background Technology

[0002] In related technologies, vehicle thermal management systems typically need to regulate the temperature of different areas such as the cockpit, battery, and electric drive system. However, the temperature regulation requirements of different areas usually differ. When the thermal management system cools or heats different areas simultaneously, it cannot accurately control the cooling or heating output to different areas. Summary of the Invention

[0003] This application provides a thermal management system, an air conditioning system, and a vehicle to at least partially solve the aforementioned technical problems.

[0004] To achieve the above objectives, according to a first aspect of this application, a thermal management system is provided, comprising: A temperature control loop includes a compressor, a first plate heat exchanger assembly, a first expansion valve, and a second plate heat exchanger assembly. The output end of the compressor is connected to the input end of the first plate heat exchanger assembly. The first expansion valve is connected between the output end of the first plate heat exchanger assembly and the input end of the second plate heat exchanger assembly. The output end of the second plate heat exchanger assembly is connected to the input end of the compressor. At least one of the first plate heat exchanger assembly and the second plate heat exchanger assembly includes at least two plate heat exchangers connected in parallel. A heat exchange circuit is connected to the at least two plate heat exchangers, the heat exchange circuit being adapted to exchange heat with the at least two plate heat exchangers.

[0005] In some embodiments, the at least two plate heat exchangers are fixedly connected together.

[0006] In some embodiments, the first plate heat exchanger assembly includes at least two first plate heat exchangers, and the heat exchange loop is connected to the at least two first plate heat exchangers and adapted to exchange heat with the at least two first plate heat exchangers; the second plate heat exchanger assembly includes at least two second plate heat exchangers, and the heat exchange loop is connected to the two second plate heat exchangers and adapted to exchange heat with the at least two second plate heat exchangers.

[0007] In some embodiments, the heat exchange loop includes a first sub-heat exchange loop connected to at least one first plate heat exchanger and / or at least one second plate heat exchanger, the first sub-heat exchange loop being adapted to exchange heat with at least one first plate heat exchanger or at least one second plate heat exchanger, and / or, The heat exchange loop includes a second sub-heat exchange loop, which is connected to at least one first plate heat exchanger and / or at least one second plate heat exchanger. The second sub-heat exchange loop is adapted to exchange heat with at least one first plate heat exchanger or at least one second plate heat exchanger.

[0008] In some embodiments, the first sub-heat exchange circuit includes an in-vehicle heat exchanger, and / or the second sub-heat exchange circuit includes a battery heat exchanger.

[0009] In some embodiments, the first sub-heat exchange loop includes an in-vehicle heat exchanger; the in-vehicle heat exchanger includes two sub-heat exchangers; The first sub-heat exchange loop is adapted to connect the two sub-heat exchangers to at least one first plate heat exchanger or at least one second plate heat exchanger, and the first sub-heat exchange loop is adapted to allow the two sub-heat exchangers to exchange heat with at least one first plate heat exchanger or at least one second plate heat exchanger, or... The first sub-heat exchange loop is adapted to connect one of the sub-heat exchangers to at least one first plate heat exchanger and to connect the other sub-heat exchanger to at least one second plate heat exchanger. The first sub-heat exchange loop is adapted to allow one of the sub-heat exchangers to exchange heat with at least one first plate heat exchanger, and the first sub-heat exchange loop is adapted to allow the other sub-heat exchanger to exchange heat with at least one second plate heat exchanger. Alternatively, A first control valve is provided between the two sub-heat exchangers. The first control valve is connected to at least one first plate heat exchanger and is adapted to control the on / off connection between the downstream sub-heat exchanger and at least one first plate heat exchanger. The output end of the upstream sub-heat exchanger is also connected to at least one second plate heat exchanger via a second control valve and is adapted to control the on / off connection between the upstream sub-heat exchanger and at least one second plate heat exchanger.

[0010] In some embodiments, the heat exchange circuit further includes a switching assembly connected to the first sub-heat exchange circuit and / or the second sub-heat exchange circuit; The switching assembly is adapted to control the on / off connection between the first sub-heat exchange loop and / or the second sub-heat exchange loop and the at least two first plate heat exchangers, and / or, The switching assembly is adapted to control the on / off connection between the first sub-heat exchange circuit and / or the second sub-heat exchange circuit and the at least two second plate heat exchangers.

[0011] In some embodiments, the switching assembly includes a first control valve group connected to the at least two first plate heat exchangers, the first sub-heat exchange loop and / or the second sub-heat exchange loop being connected to the first control valve group, the first control valve group being adapted to control the on / off connection between the first sub-heat exchange loop and / or the second sub-heat exchange loop and the at least two first plate heat exchangers, and / or... The switching assembly includes a second control valve group connected to the at least two second plate heat exchangers, wherein the first sub-heat exchange loop and / or the second sub-heat exchange loop are connected to the second control valve group, and the second control valve group is adapted to control the on / off connection between the first sub-heat exchange loop and / or the second sub-heat exchange loop and the at least two second plate heat exchangers, and / or... The switching assembly includes a first control valve group connected to the at least two first plate heat exchangers. The first control valve group includes a first three-way valve, a second three-way valve, a first check valve, and a second check valve. The first port of the first three-way valve is connected to the coolant inlet of one of the first plate heat exchangers; the second port of the first three-way valve is connected to the output of the second sub-heat exchange loop and the first check valve; and the third port of the first three-way valve is connected to the input of the first check valve, the input of the second check valve, and the third port of the second three-way valve. The first port of the second three-way valve is connected to the coolant inlet of the other first plate heat exchanger; the second port of the second three-way valve is connected to the output of the first sub-heat exchange loop and the second check valve; and the third port of the second three-way valve is connected to the input of the first check valve and the input of the second check valve, and / or... The switching assembly includes a second control valve group connected to the at least two second plate heat exchangers. The second control valve assembly includes a third three-way valve, a fourth three-way valve, a third check valve, and a fourth check valve. The first port of the third three-way valve is connected to the coolant inlet of one of the second plate heat exchangers. The second port of the third three-way valve is connected to the output of the second sub-heat exchange loop and the third check valve. The third port of the third three-way valve is connected to the input of the third check valve, the input of the fourth check valve, and the third port of the fourth three-way valve. The first port of the fourth three-way valve is connected to the coolant inlet of the other second plate heat exchanger. The second port of the fourth three-way valve is connected to the first port of the first sub-heat exchange loop and the output of the fourth check valve. The third port of the fourth three-way valve is connected to the input of the third check valve and the input of the fourth check valve.

[0012] In some embodiments, the thermal management system further includes a subcooler connected between the output of the first plate heat exchanger assembly and the first expansion valve.

[0013] In some embodiments, the heat exchange circuit further includes a third sub-heat exchange circuit connected to the subcooler to cool the temperature-regulating medium passing through the subcooler.

[0014] In some embodiments, the heat exchange loop further includes a third sub-heat exchange loop connected to at least one first plate heat exchanger and / or at least one second plate heat exchanger, the third sub-heat exchange loop being adapted to exchange heat with at least one first plate heat exchanger and / or at least one second plate heat exchanger. The third sub-heat exchange circuit is suitable for cooling the electric drive system.

[0015] In some embodiments, the third sub-heat exchange loop includes a radiator and an electric drive system heat exchanger, the radiator being connected to the electric drive system heat exchanger, the electric drive system heat exchanger being adapted to cool the electric drive system.

[0016] According to a second aspect of this application, an air conditioning system is provided, including a thermal management system as described above, the thermal management system comprising: A temperature control loop includes a compressor, a first plate heat exchanger assembly, a first expansion valve, and a second plate heat exchanger assembly. The output end of the compressor is connected to the input end of the first plate heat exchanger assembly. The first expansion valve is connected between the output end of the first plate heat exchanger assembly and the input end of the second plate heat exchanger assembly. The output end of the second plate heat exchanger assembly is connected to the input end of the compressor. At least one of the first plate heat exchanger assembly and the second plate heat exchanger assembly includes at least two plate heat exchangers connected in parallel. A heat exchange circuit is connected to the at least two plate heat exchangers, the heat exchange circuit being adapted to exchange heat with the at least two plate heat exchangers.

[0017] According to a third aspect of this application, a vehicle is provided, including a thermal management system as described above, and / or an air conditioning system as described above.

[0018] The thermal management system provided in this application includes a temperature regulation loop comprising a first plate heat exchanger assembly, a second plate heat exchanger assembly, and a first expansion valve connected between the output end of the first plate heat exchanger assembly and the input end of the second plate heat exchanger assembly. At least one of the first and second plate heat exchanger assemblies includes at least two plate heat exchangers connected in parallel. Furthermore, by connecting the heat exchange loop to at least two plate heat exchangers, the heat exchange loop can exchange heat with at least two plate heat exchangers. Therefore, by exchanging heat with plate heat exchangers of different heat exchange efficiencies, the cooling or heating capacity of the heat exchange loop can be flexibly adjusted, thereby accurately controlling the cooling or heating capacity output by the thermal management system, making it suitable for temperature regulation in intelligent cockpits.

[0019] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0022] Figure 1 A schematic diagram of the structure of one embodiment of the thermal management system provided in this application; Figure 2 The flow diagram of the thermal management system provided in this application embodiment when it is in air conditioning cooling mode; Figure 3 Flow diagram of the thermal management system provided in this application embodiment when it is in heat pump heating mode; Figure 4 The flow diagram of the thermal management system provided in this application embodiment when it is in battery cooling mode; Figure 5 Flow diagram of the thermal management system provided in this application embodiment when it is in extremely low temperature heating mode; Figure 6 Flow diagram of the thermal management system provided in this application embodiment when it is in air conditioning cooling and battery cooling modes; Figure 7 The flow diagram of the thermal management system provided in this application embodiment when it is in battery heating mode; Figure 8Flow diagram of the thermal management system provided in this application embodiment when it is in heat pump heating and battery heating modes; Figure 9 Flow diagram of the thermal management system provided in this application embodiment when it is in heat pump heating and battery cooling modes; Figure 10 The flow path diagram of the thermal management system provided in this application embodiment when it is in dehumidification mode; Figure 11 A schematic diagram of another embodiment of the thermal management system provided in this application; Figure 12 This is a schematic diagram of the structure of one embodiment of the vehicle provided in this application.

[0023] Explanation of reference numerals in the attached figures: 1-Vehicle; 10-Air conditioning system; 2-Thermal management system; 21-Temperature control loop; 211-Compressor; 212-Gas-liquid separator; 213-First plate heat exchanger assembly; 2131-First plate heat exchanger; 214-Reservoir tank; 215-First expansion valve; 216-Second plate heat exchanger assembly; 2161-Second plate heat exchanger; 210-Plate heat exchanger; 217-Second expansion valve; 22-Heat exchange loop; 221-First sub-heat exchange loop; 2211-Third water pump; 2212-In-vehicle heat exchanger; 2213-Sub-heat exchanger; 222-Second sub-heat exchange loop; 2221-Second water pump; 2222-Battery heat exchanger; 223-Third sub-heat exchange loop; 2231-First water pump; 2232- Radiator; 2233-Electric drive system heat exchanger; 2234-Subcooler; 2241-First four-way valve; 2242-Second four-way valve; 2243-First shut-off valve; 2244-Second shut-off valve; 2245-Second control valve; 2246-Third three-way valve; 2247-Fourth three-way valve; 2248-First three-way valve; 2249-Second three-way valve; 2250-Fifth three-way valve; 2251-First control valve; 2252-Seventh three-way valve; 2253-Third check valve; 2254-Fourth check valve; 2255-First check valve; 2256-Second check valve; 2257-Fourth shut-off valve; 226-Switch assembly; 2261-First control valve assembly; 2262-Second control valve assembly. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0025] This application provides a thermal management system, an air conditioning system, and a vehicle. The embodiments of the thermal management system and the vehicle are described in detail below.

[0026] Figure 1 This is a schematic diagram of the structure of one embodiment of the thermal management system provided in this application. Figure 1 As shown, the thermal management system 2 may include a temperature regulating loop 21 and a heat exchange loop 22. The temperature regulating loop 21 is adapted to perform refrigeration through a temperature regulating medium. The heat exchange loop 22 is connected to the temperature regulating loop 21, thereby enabling heat exchange between the heat exchange loop 22 and the temperature regulating loop 21. It should be noted that the temperature regulating loop 21 can conduct heat to the heat exchange loop 22, or the temperature regulating loop 21 can absorb heat from the heat exchange loop 22.

[0027] The temperature regulating loop 21 can supply the flow of a first temperature regulating medium. The heat exchange loop 22 can supply the flow of a second temperature regulating medium. At the connection between the temperature regulating loop 21 and the heat exchange loop 22, the first temperature regulating medium in the temperature regulating loop 21 can exchange heat with the second temperature regulating medium in the heat exchange loop 22, thereby realizing heat exchange between the temperature regulating loop 21 and the heat exchange loop 22.

[0028] It should be noted that the heat exchange between the first temperature regulating medium and the second temperature regulating medium includes the first temperature regulating medium conducting heat to the second temperature regulating medium, or the second temperature regulating medium conducting heat to the first temperature regulating medium. The first temperature regulating medium can be R290 or other types of refrigerant. The second temperature regulating medium can be coolant or refrigerant. The first and second temperature regulating media can be of the same or different types.

[0029] When the first temperature regulating medium is R290 refrigerant, the cooling and heating capacity of the first temperature regulating medium is relatively balanced, and its performance is well adapted to the needs of automotive thermal management. In addition, R290 refrigerant has a global warming potential of 3, which meets the regulatory requirements.

[0030] In some embodiments, the temperature regulating circuit 21 may include a compressor 211, a first plate heat exchanger assembly 213, a first expansion valve 215, and a second plate heat exchanger assembly 216. The output end of the compressor 211 is connected to the input end of the first plate heat exchanger assembly 213. The first expansion valve 215 is connected between the output end of the first plate heat exchanger assembly 213 and the input end of the second plate heat exchanger assembly 216. The output end of the second plate heat exchanger assembly 216 is connected to the input end of the compressor 211. Thus, the compressor 211 compresses the temperature regulating medium and transmits it to the first plate heat exchanger assembly 213. Then, from the output end of the first plate heat exchanger assembly 213, it passes through the first expansion valve 215 and enters the second plate heat exchanger assembly 216 from the input end. Finally, it flows back to the compressor 211 from the output end of the second plate heat exchanger assembly 216. The temperature regulating medium has a higher temperature and pressure within the first plate heat exchanger assembly 213, and will release heat through the first plate heat exchanger assembly 213. Since a first expansion valve 215 is connected between the output end of the first plate heat exchanger assembly 213 and the input end of the second plate heat exchanger assembly 216, when the temperature regulating medium is converted to a low temperature and low pressure state through the first expansion valve 215, it will enter the second plate heat exchanger assembly 216 and absorb heat through the second plate heat exchanger assembly 216.

[0031] The heat exchange loop 22 is connected to the first plate heat exchanger assembly 213 and the second plate heat exchanger assembly 216. The heat exchange loop 22 is adapted to exchange heat with the temperature regulating loop 21 through the first plate heat exchanger assembly 213 and / or the second plate heat exchanger assembly 216. Specifically, the heat exchange loop 22 can absorb heat from the temperature regulating loop 21 through the first plate heat exchanger assembly 213, thereby achieving heat exchange between the heat exchange loop 22 and the temperature regulating loop 21, and heating the target area through the heat exchange loop 22. Additionally, the heat exchange loop 22 can release heat conducted to the temperature regulating loop 21 through the second plate heat exchanger assembly 216, thereby achieving heat exchange between the heat exchange loop 22 and the temperature regulating loop 21, and cooling the target area through the heat exchange loop 22.

[0032] By including a first plate heat exchanger assembly 213, a second plate heat exchanger assembly 216, and a first expansion valve 215 connected between the output end of the first plate heat exchanger assembly 213 and the input end of the second plate heat exchanger assembly 216 in the temperature regulation loop 21, the temperature and pressure of the temperature regulation medium in the temperature regulation loop 21 are higher in the first plate heat exchanger assembly 213, and heat is released through the first plate heat exchanger assembly 213. Meanwhile, the temperature and pressure of the heat exchange medium entering the second plate heat exchanger assembly 216 are lower, and heat is absorbed through the second plate heat exchanger assembly 216.

[0033] Based on this, by connecting the heat exchange loop 22 to the first plate heat exchanger assembly 213 and the second plate heat exchanger assembly 216, the heat exchange loop 22 is adapted to exchange heat with the temperature regulating loop 21 through the first plate heat exchanger assembly 213 and / or the second plate heat exchanger assembly 216. This allows the heat exchange loop 22 to absorb heat from the temperature regulating loop 21 through the first plate heat exchanger assembly 213 and heat the target area. Simultaneously, the heat exchange loop 22 can also release heat conducted to the temperature regulating loop 21 through the second plate heat exchanger assembly 216 to cool the target area.

[0034] Therefore, the thermal management system 2 provided in this application embodiment can simultaneously heat and cool different target areas, meeting the temperature regulation needs of different target areas. Furthermore, since the temperature regulation loop 21 does not directly heat or cool the target area, it helps reduce the risk of refrigerant leakage from the temperature regulation loop 21 into the target area.

[0035] In some embodiments, at least one of the first plate heat exchanger assembly 213 and the second plate heat exchanger assembly 216 may include at least two plate heat exchangers 210 connected in parallel, and the heat exchange loop 22 is connected to the at least two plate heat exchangers 210, and the heat exchange loop 22 is adapted to exchange heat with the at least two plate heat exchangers 210. Thus, by exchanging heat with plate heat exchangers 210 of different heat exchange efficiencies, the cooling or heating capacity of the heat exchange loop 22 can be flexibly adjusted, thereby accurately controlling the cooling or heating capacity output by the thermal management system 2, suitable for temperature regulation within a smart cockpit.

[0036] It should be noted that the first plate heat exchanger assembly 213 and the second plate heat exchanger assembly 216 may each include at least two plate heat exchangers 210 connected in parallel, or one of the first plate heat exchanger assembly 213 and the second plate heat exchanger assembly 216 may include at least two plate heat exchangers 210 connected in parallel.

[0037] In some embodiments, at least two plate heat exchangers 210 may be fixedly connected together to make the structure of the first plate heat exchanger assembly 213 or the second plate heat exchanger assembly 216 more compact.

[0038] In some embodiments, the first plate heat exchanger assembly 213 may include at least two first plate heat exchangers 2131 connected in parallel, that is, the plate heat exchanger 210 includes at least two first plate heat exchangers 2131, and the heat exchange loop 22 is connected to the at least two first plate heat exchangers 2131 of the first plate heat exchanger assembly 213. The heat exchange loop 22 is adapted to exchange heat with the at least two first plate heat exchangers 2131 of the first plate heat exchanger assembly 213. Thus, heat exchange can be performed between the at least two first plate heat exchangers 2131 of the first plate heat exchanger assembly 213 and the heat exchange loop 22, so as to flexibly adjust the heating capacity of the heat exchange loop 22, thereby accurately controlling the heating capacity output by the thermal management system 2.

[0039] In some embodiments, the second plate heat exchanger assembly 216 may include at least two second plate heat exchangers 2161 connected in parallel, that is, the plate heat exchanger 210 includes at least two second plate heat exchangers 2161, and the heat exchange loop 22 is connected to the at least two second plate heat exchangers 2161 of the second plate heat exchanger assembly 216. The heat exchange loop 22 is adapted to be connected to the at least two second plate heat exchangers 2161 of the second plate heat exchanger assembly 216. Thus, heat exchange can be performed between the at least two second plate heat exchangers 2161 of the second plate heat exchanger assembly 216 and the heat exchange loop 22, so as to flexibly adjust the cooling capacity of the heat exchange loop 22, thereby accurately controlling the cooling capacity output by the thermal management system 2.

[0040] In some embodiments, the temperature regulating loop 21 may further include a liquid storage tank 214, which is connected between the output end of the first plate heat exchanger assembly 213 and the first expansion valve 215. Thus, the high-temperature, high-pressure first temperature regulating medium, after being cooled by the first plate heat exchanger assembly 213, can first enter the liquid storage tank 214. Within the liquid storage tank 214, the liquid and gaseous states of the first temperature regulating medium are separated, allowing the saturated liquid first temperature regulating medium to be transferred from the liquid storage tank 214 to the first expansion valve 215. The first expansion valve 215 then throttles and reduces the pressure to form a low-temperature, low-pressure two-phase state of the first temperature regulating medium, facilitating its absorption of heat from the heat exchange loop 22 after entering the second plate heat exchanger assembly 216.

[0041] In some embodiments, the temperature regulating loop 21 may include two first expansion valves 215, and the output ends of the two first plate heat exchangers 2131 are respectively connected to the input ends of the two second plate heat exchangers 2161 through the first expansion valves 215. Thus, the output end of each first plate heat exchanger 2131 is connected to the input end of the second plate heat exchanger 2161 through a first expansion valve 215, which helps to increase the flow rate of the low-temperature, low-pressure first temperature regulating medium transferred from the first plate heat exchanger 2131 to the second plate heat exchanger 2161.

[0042] Among them, a liquid storage tank 214 is provided between the output end of each first plate heat exchanger 2131 and the first expansion valve 215, so that more liquid first temperature regulating medium flows into the two first expansion valves 215.

[0043] In some embodiments, the heat exchange loop 22 may include a first sub-heat exchange loop 221, which is connected to at least one first plate heat exchanger 2131 of the first plate heat exchanger assembly 213 and / or at least one second plate heat exchanger 2161 of the second plate heat exchanger assembly 216. The first sub-heat exchange loop 221 is adapted to exchange heat with at least one first plate heat exchanger 2131 of the first plate heat exchanger assembly 213 and / or at least one second plate heat exchanger 2161 of the second plate heat exchanger assembly 216.

[0044] Therefore, the first sub-heat exchange circuit 221 can exchange heat with at least one first plate heat exchanger 2131 of the first plate heat exchanger assembly 213 and / or at least one second plate heat exchanger 2161 of the second plate heat exchanger assembly 216, thereby flexibly adjusting the cooling or heating capacity of the first sub-heat exchange circuit 221, and thus accurately controlling the cooling or heating capacity output by the thermal management system 2.

[0045] In some embodiments, the first sub-heat exchange circuit 221 may include an in-vehicle heat exchanger 2212. The in-vehicle heat exchanger 2212 can thus cool or heat the passenger compartment. Specifically, when the first sub-heat exchange circuit 221 is connected to the first plate heat exchanger assembly 213 and exchanges heat with the temperature control circuit 21 through the first plate heat exchanger assembly 213, the in-vehicle heat exchanger 2212 can heat the vehicle interior. When the first sub-heat exchange circuit 221 is connected to the second plate heat exchanger assembly 216 and exchanges heat with the temperature control circuit 21 through the second plate heat exchanger assembly 216, the in-vehicle heat exchanger 2212 can cool the vehicle interior.

[0046] In some embodiments, the in-vehicle heat exchanger 2212 may include two sub-heat exchangers 2213. A first sub-heat exchange circuit 221 is adapted to connect the two sub-heat exchangers 2213 to at least one first plate heat exchanger 2131 of a first plate heat exchanger assembly 213 and at least one second plate heat exchanger 2161 of a second plate heat exchanger assembly 216, and is adapted to allow the two sub-heat exchangers 2213 to exchange heat with at least one first plate heat exchanger 2131 of the first plate heat exchanger assembly 213 and at least one second plate heat exchanger 2161 of the second plate heat exchanger assembly 216. Thus, the two sub-heat exchangers 2213 can exchange heat with the temperature control circuit 21 through at least one first plate heat exchanger 2131 of the first plate heat exchanger assembly 213 or at least one second plate heat exchanger 2161 of the second plate heat exchanger assembly 216, thereby improving the cooling or heating effect of the in-vehicle heat exchanger 2212.

[0047] Alternatively, the first sub-heat exchange loop 221 can be adapted to connect one sub-heat exchanger 2213 to at least one first plate heat exchanger 2131 of the first plate heat exchanger assembly 213, and the other sub-heat exchanger 2213 to at least one second plate heat exchanger 2161 of the second plate heat exchanger assembly 216. The first sub-heat exchange loop 221 is adapted to allow one sub-heat exchanger 2213 to exchange heat with at least one first plate heat exchanger 2131, and the first sub-heat exchange loop 221 is adapted to allow the other sub-heat exchanger 2213 to exchange heat with at least one second plate heat exchanger 2161. Thus, one sub-heat exchanger 2213 can be cooled while the other sub-heat exchanger 2213 is heated, thereby achieving dehumidification.

[0048] In some embodiments, a first control valve 2251 may be provided between two sub-heat exchangers 2213. The first control valve 2251 is connected to at least one first plate heat exchanger 2131 and is adapted to control the on / off connection between the downstream sub-heat exchanger 2213 and at least one first plate heat exchanger 2131. The first control valve 2251 may include a three-way valve.

[0049] Meanwhile, the output end of the upstream sub-heat exchanger 2213 is also connected to at least one second plate heat exchanger 2161 via a second control valve 2245. The second control valve 2245 is adapted to control the on / off connection between the upstream sub-heat exchanger 2213 and at least one second plate heat exchanger 2161. The second control valve 2245 may include a shut-off valve.

[0050] Therefore, when dehumidification is required through the first sub-heat exchange circuit 221, the first control valve 2251 can control the downstream sub-heat exchanger 2213 to connect with at least one first plate heat exchanger 2131, enabling the downstream sub-heat exchanger 2213 to heat. Simultaneously, the second control valve 2245 can be used to control the upstream sub-heat exchanger 2213 to connect with at least one second plate heat exchanger 2161, enabling the upstream sub-heat exchanger 2213 to cool, thereby achieving the dehumidification function.

[0051] In some embodiments, the heat exchange circuit 22 may include a second sub-heat exchange circuit 222, which is connected to at least one first plate heat exchanger 2131 and / or at least one second plate heat exchanger 2161, and is adapted to exchange heat with at least one first plate heat exchanger 2131 or at least one second plate heat exchanger 2161.

[0052] Therefore, the second sub-heat exchange circuit 222 can exchange heat with at least one first plate heat exchanger 2131 of the first plate heat exchanger assembly 213 and / or at least one second plate heat exchanger 2161 of the second plate heat exchanger assembly 216, thereby flexibly adjusting the cooling or heating capacity of the second sub-heat exchange circuit 222, and thus accurately controlling the cooling or heating capacity output by the thermal management system 2.

[0053] The second sub-heat exchange circuit 222 may include a battery heat exchanger 2222. The battery can be cooled or heated via the battery heat exchanger 2222. When the second sub-heat exchange circuit 222 is connected to the first plate heat exchanger assembly 213 and exchanges heat with the temperature regulation circuit 21 through the first plate heat exchanger assembly 213, the battery can be heated via the in-vehicle heat exchanger 2212. When the second sub-heat exchange circuit 222 is connected to the second plate heat exchanger assembly 216 and exchanges heat with the temperature regulation circuit 21 through the second plate heat exchanger assembly 216, the battery can be cooled via the in-vehicle heat exchanger 2212.

[0054] When the first sub-heat exchange circuit 221 is an in-vehicle heat exchanger 2212 and the second sub-heat exchange circuit 222 is a battery heat exchanger 2222, by having the first sub-heat exchange circuit 221 and the second sub-heat exchange circuit 222 exchange heat with the temperature regulation circuit 21 through the first plate heat exchanger assembly 213 and / or the second plate heat exchanger assembly 216 respectively, it is suitable to ensure that the coolant temperature in the first sub-heat exchange circuit 221 meets the requirement of 0°C-80°C and the coolant temperature in the second sub-heat exchange circuit 222 meets the requirement of 20°C-50°C.

[0055] In some embodiments, the heat exchange circuit 22 may further include a switching assembly 226 connected to the first sub-heat exchange circuit 221 and / or the second sub-heat exchange circuit 222, the switching assembly 226 being adapted to control the on / off connection between the first sub-heat exchange circuit 221 and / or the second sub-heat exchange circuit 222 and at least two first plate heat exchangers 2131. Thus, when the first sub-heat exchange circuit 221 needs to exchange heat with the temperature control circuit 21 through the first sub-heat exchange circuit 221 and / or the second sub-heat exchange circuit 222, the switching assembly 226 can control the connection between the first sub-heat exchange circuit 221 and / or the second sub-heat exchange circuit 222 and at least two first plate heat exchangers 2131 of the first plate heat exchanger assembly 213. Conversely, when the first sub-heat exchange loop 221 and / or the second sub-heat exchange loop 222 do not need to exchange heat with the temperature control loop 21 through the first plate heat exchanger assembly 213, the first sub-heat exchange loop 221 and / or the second sub-heat exchange loop 222 can be disconnected from at least two first plate heat exchangers 2131 of the first plate heat exchanger assembly 213 to avoid heat loss caused by the first sub-heat exchange loop 221 and / or the second sub-heat exchange loop 222 exchanging heat with the temperature control loop 21 through at least two first plate heat exchangers 2131 of the first plate heat exchanger assembly 213.

[0056] In some embodiments, the switching assembly 226 may include a first control valve group 2261 connected to at least two first plate heat exchangers 2131, a first sub-heat exchange loop 221 and / or a second sub-heat exchange loop 222 connected to the first control valve group 2261, and the first control valve group 2261 is adapted to control the on / off connection between the first sub-heat exchange loop 221 and / or the second sub-heat exchange loop 222 and at least two first plate heat exchangers 2131.

[0057] Thus, the switching assembly 226 can control the on / off connection between the first sub-heat exchange circuit 221 and / or the second sub-heat exchange circuit 222 and at least two first plate heat exchangers 2131 via the first control valve group 2261.

[0058] In some embodiments, the first control valve group 2261 may include a first three-way valve 2248, a second three-way valve 2249, a first check valve 2255, and a second check valve 2256. The first valve port of the first three-way valve 2248 is connected to the coolant inlet of one of the first plate heat exchangers 2131. The second valve port of the first three-way valve 2248 is connected to the output of the second sub-heat exchange circuit 222 and the first check valve 2255. The third valve port of the first three-way valve 2248 is connected to the input of the first check valve 2255, the input of the second check valve 2256, and the third valve port of the second three-way valve 2249.

[0059] The first port of the second three-way valve 2249 is connected to the coolant inlet of another first plate heat exchanger 2131. The second port of the second three-way valve 2249 is connected to the output of the first sub-heat exchange circuit 221 and the second check valve 2256. The third port of the second three-way valve 2249 is connected to the input of the first check valve 2255 and the input of the second check valve 2256.

[0060] Therefore, by controlling the opening and closing states of each valve port of the first three-way valve 2248 and the second three-way valve 2249, the on / off states between the first sub-heat exchange circuit 221 and / or the second sub-heat exchange circuit 222 and at least two first plate heat exchangers 2131 can be flexibly controlled.

[0061] In some embodiments, the switching assembly 226 may include a second control valve group 2262 connected to at least two second plate heat exchangers 2161, with a first sub-heat exchange loop 221 and / or a second sub-heat exchange loop 222 connected to the second control valve group 2262, and the second control valve group 2262 adapted to control the on / off connection between the first sub-heat exchange loop 221 and / or the second sub-heat exchange loop 222 and the at least two second plate heat exchangers 2161.

[0062] Thus, the switching assembly 226 can control the on / off connection between the first sub-heat exchange circuit 221 and / or the second sub-heat exchange circuit 222 and at least two second plate heat exchangers 2161 via the second control valve group 2262.

[0063] In some embodiments, the second control valve group 2262 may include a third three-way valve 2246, a fourth three-way valve 2247, a third check valve 2253, and a fourth check valve 2254. The first valve port of the third three-way valve 2246 is connected to the coolant inlet of one of the second plate heat exchangers 2161. The second valve port of the third three-way valve 2246 is connected to the output of the second sub-heat exchange circuit 222 and the third check valve 2253. The third valve port of the third three-way valve 2246 is connected to the input of the third check valve 2253, the input of the fourth check valve 2254, and the third valve port of the fourth three-way valve 2247.

[0064] The first valve port of the fourth three-way valve 2247 is connected to the coolant inlet of another second plate heat exchanger 2161. The second valve port of the fourth three-way valve 2247 is connected to the first valve port of the first sub-heat exchange circuit 221 and the output of the fourth one-way valve 2254. The third valve port of the fourth three-way valve 2247 is connected to the input of the third one-way valve 2253 and the input of the fourth one-way valve 2254.

[0065] Therefore, by controlling the opening and closing states of each valve port of the third three-way valve 2246 and the fourth three-way valve 2247, the on / off states between the first sub-heat exchange circuit 221 and / or the second sub-heat exchange circuit 222 and at least two second plate heat exchangers 2161 can be flexibly controlled.

[0066] In some embodiments, the thermal management system 2 may further include a subcooler 2234 connected between the output of the first plate heat exchanger assembly 213 and the first expansion valve 215. Thus, the subcooler 2234 can cool the first temperature regulating medium output from the output of the first plate heat exchanger assembly 213 into a subcooled liquid state, reducing the enthalpy of the first temperature regulating medium and increasing the cooling capacity of the second plate heat exchanger assembly 216.

[0067] The subcooler 2234 can be connected between the liquid storage tank 214 and the first expansion valve 215, so that the subcooler 2234 cools the saturated liquid first temperature regulating medium output from the liquid storage pipe into a subcooled liquid first temperature regulating medium.

[0068] In some embodiments, the heat exchange circuit 22 may further include a third sub-heat exchange circuit 223, which is connected to the subcooler 2234. Thus, the temperature-regulating medium passing through the subcooler 2234 can be cooled via the third sub-heat exchange circuit 223, thereby improving the efficiency of the subcooler 2234 in cooling the first temperature-regulating medium output from the output end of the first plate heat exchanger assembly 213 into a subcooled liquid state.

[0069] In some embodiments, the heat exchange loop 22 may further include a third sub-heat exchange loop 223, which is connected to at least one first plate heat exchanger 2131 of the first plate heat exchanger assembly 213 and / or at least one second plate heat exchanger 2161 of the second plate heat exchanger assembly 216. The third sub-heat exchange loop 223 is adapted to exchange heat with the temperature control loop 21 through the first plate heat exchanger assembly 213 and / or the second plate heat exchanger assembly 216. Thus, heating and cooling of more target areas can be achieved through the third sub-heat exchange loop 223, and the cooling or heating capacity of the third sub-heat exchange loop 223 can be precisely controlled.

[0070] The third sub-heat exchange circuit 223 can be adapted to cool the electric drive system. Thus, the electric drive system can be cooled and de-temperatureed through the third sub-heat exchange system.

[0071] In some embodiments, the third sub-heat exchange circuit may include a radiator 2232 and an electric drive system heat exchanger 2233, with the output end of the radiator 2232 connected to the input end of the electric drive system heat exchanger 2233. The electric drive system heat exchanger 2233 is adapted to cool the electric drive system to improve the working stability of the electric drive system.

[0072] In some embodiments, the thermal management system 2 may further include a compressor 211 and a gas-liquid separator 212. The output end of the compressor 211 is connected to the input end of the first plate heat exchanger assembly 213, and the gas-liquid separator 212 is connected between the input end of the compressor 211 and the output end of the second plate heat exchanger assembly 216. Thus, the first temperature regulating medium can be compressed by the compressor 211 and transmitted to the first plate heat exchanger assembly 213, and then flowed back to the compressor 211 after passing through the first expansion valve 215, the second plate heat exchanger assembly 216, and the gas-liquid separator 212 in sequence.

[0073] The temperature regulation loop 21 may also include a second expansion valve 217. The input end of the second expansion valve 217 is connected to the output end of the first plate heat exchanger assembly 213, and the output end of the second expansion valve 217 is connected to the input end of the gas-liquid separator 212. Thus, in extremely low temperature environments, the first temperature regulating medium output from the output end of the first plate heat exchanger assembly 213 flows into the second expansion valve 217. The second expansion valve 217 throttles and reduces the pressure to form a low-temperature, low-pressure two-phase first temperature regulating medium, which is then transmitted to the gas-liquid separator 212. The gas-liquid separator 212 separates the two phases of the first temperature regulating medium, allowing the gaseous first temperature regulating medium to enter the compressor 211. The compressor 211 then further compresses the gaseous first temperature regulating medium, making it suitable for continuously releasing heat from the first plate heat exchanger assembly 213, thus meeting the heating requirements under extremely low temperature conditions and effectively solving the problem of insufficient heating capacity of the first temperature regulating medium, such as R290, under extremely low temperature conditions.

[0074] It should be noted that extremely low temperature operating conditions can be when the ambient temperature is less than or equal to -20°C. Furthermore, extremely low temperature operating conditions can be when the ambient temperature is less than or equal to -25°C.

[0075] In some embodiments, the first plate heat exchanger assembly 213 may include two first plate heat exchangers 2131 connected in parallel, with the output ends of the two first plate heat exchangers 2131 connected to the input end of the second plate heat exchanger assembly 216 via a first expansion valve 215. The temperature control loop 21 may include two second expansion valves 217, with the input ends of the two second expansion valves 217 corresponding to the output ends of the two first plate heat exchangers 2131. This is suitable for further improving the heating effect of the thermal management system 2 under extremely low temperature conditions.

[0076] The second expansion valve 217 can be a triangular circulation expansion valve or other expansion valve suitable for throttling and depressurizing the first temperature regulating medium to form a two-phase first temperature regulating medium with low temperature and low pressure; no restrictions are imposed here.

[0077] In other embodiments, such as Figure 11 As shown, the thermal management system 2 may also exclude the second expansion valve 217 and the gas-liquid separator 212, and / or the thermal management system 2 may also exclude the subcooler 2234, which is also suitable for achieving cooling and temperature reduction of different target areas to a certain extent.

[0078] The specific structure and various working modes of the thermal management system 2 are described in detail below.

[0079] like Figure 1 As shown, the third sub-heat exchange loop 223 may include a first water pump 2231, a radiator 2232, and an electric drive system heat exchanger 2233. The output end of the first water pump 2231 is connected to the input end of the radiator 2232, the output end of the radiator 2232 is connected to the input end of the electric drive system heat exchanger 2233, and the output end of the electric drive system heat exchanger 2233 is connected to the input ends of two subcoolers 2234. The output ends of the two subcoolers 2234 are connected to the two first plate heat exchangers 2131 of the first plate heat exchanger assembly 213. A fourth shut-off valve 2257 may also be provided between the subcoolers 2234 and the electric drive system heat exchanger 2233.

[0080] The second sub-heat exchange circuit 222 includes a second water pump 2221 and a battery heat exchanger 2222, with the output end of the second water pump 2221 connected to the input end of the battery heat exchanger 2222.

[0081] The first sub-heat exchange circuit 221 includes a third water pump 2211 and two sub-heat exchangers 2213. The output end of the third water pump 2211 is connected to the input end of the first sub-heat exchanger 2213, and the output end of the first sub-heat exchanger 2213 is connected to the input end of the second sub-heat exchanger 2213.

[0082] The input terminals of the first water pump 2231, the second water pump 2221, the output terminal of the third check valve 2253, and the output terminal of the first check valve 2255 are respectively connected to the first four-way valve 2241.

[0083] The output terminals of the battery heat exchanger 2222, the electric drive system heat exchanger 2233, the coolant output terminal of the first plate heat exchanger assembly 213, and the coolant output terminal of the first plate heat exchanger 2161 are respectively connected to the second four-way valve 2242.

[0084] The two ends of the first shut-off valve 2243 are connected to the coolant output ends of the two second plate heat exchangers 2161. The two ends of the second shut-off valve 2244 are connected to the coolant output ends of the two first plate heat exchangers 2131.

[0085] The first port of the third three-way valve 2246 is connected to the coolant inlet of the first second plate heat exchanger 2161. The second port of the third three-way valve 2246 is connected to the output of the first four-way valve 2241 and the third check valve 2253. The third port of the third three-way valve 2246 is connected to the input of the third check valve 2253, the input of the fourth check valve 2254, and the third port of the fourth three-way valve 2247.

[0086] The first valve port of the fourth three-way valve 2247 is connected to the coolant inlet of the second plate heat exchanger 2161. The second valve port of the fourth three-way valve 2247 is connected to the first valve port of the fifth three-way valve 2250 and the output of the fourth check valve 2254. The third valve port of the fourth three-way valve 2247 is connected to the input of the third check valve 2253 and the input of the fourth check valve 2254.

[0087] The first port of the first three-way valve 2248 is connected to the coolant inlet of the first plate heat exchanger 2131. The second port of the first three-way valve 2248 is connected to the output of the first four-way valve 2241 and the first check valve 2255. The third port of the first three-way valve 2248 is connected to the input of the first check valve 2255, the input of the second check valve 2256, and the third port of the second three-way valve 2249.

[0088] The first port of the second three-way valve 2249 is connected to the coolant inlet of the second first plate heat exchanger 2131. The second port of the second three-way valve 2249 is connected to the second port of the fifth three-way valve 2250 and the output of the second one-way valve 2256. The third port of the second three-way valve 2249 is connected to the input of the first one-way valve 2255 and the input of the second one-way valve 2256.

[0089] The third valve port of the fifth three-way valve 2250 is connected to the input end of the third water pump 2211.

[0090] The first valve port of the first control valve 2251 is connected to the output end of the first sub-heat exchanger 2213, the second valve port of the first control valve 2251 is connected to the output end of the first water pump 2231, and the third valve port of the first control valve 2251 is connected to the input end of the second sub-heat exchanger 2213.

[0091] The first valve port of the seventh three-way valve 2252 is connected to the output end of the second sub-heat exchanger 2213, the second valve port of the seventh three-way valve 2252 is connected to the coolant output end of the second first plate heat exchanger 2131, the third valve port of the seventh three-way valve 2252 and one end of the second control valve 2245 are respectively connected to the coolant output end of the second second plate heat exchanger 2161, and the other end of the second control valve 2245 is connected to the output end of the first sub-heat exchanger 2213.

[0092] like Figure 2 As shown, when the thermal management system 2 is in air conditioning cooling mode, the two second expansion valves 217 are closed and the two first expansion valves 215 are open; the first water pump 2231 and the third water pump 2211 in the coolant circuit are turned on, the first shut-off valve 2243, the second shut-off valve 2244 and the fourth shut-off valve 2257 are connected, and the second control valve 2245 is closed.

[0093] The compressor 211 discharges high-temperature, high-pressure gaseous refrigerant, which is cooled by the coolant in the two first plate heat exchangers 2131 and then enters the liquid storage tank 214. The saturated liquid refrigerant from the liquid storage tank 214 is cooled into a subcooled liquid by the coolant from the fourth shut-off valve 2257, and then passes through the two first expansion valves 215 for throttling and pressure reduction to form a low-temperature, low-pressure two-phase refrigerant. The low-temperature, low-pressure two-phase refrigerant absorbs heat from the coolant in the second plate heat exchanger 2161 and finally becomes a superheated gaseous refrigerant that enters the compressor 211, forming a refrigerant cycle. The high-temperature side circulating coolant is driven by the first water pump 2231, enters the radiator 2232 to dissipate heat into the atmosphere, and then enters the electric drive system heat exchanger 2233 to absorb heat from the motor. The second four-way valve 2242 distributes the high-temperature coolant to the first plate heat exchanger 2131 to cool the high-temperature refrigerant. Then, it flows back to the first water pump 2231 under the control of the first three-way valve 2248, the second three-way valve 2249, and the first four-way valve 2241, forming a high-temperature side coolant circulation. The low-temperature side circulating coolant is driven by the third water pump 2211, enters the first sub-heat exchanger 2213 and the second sub-heat exchanger 2213 in sequence to absorb heat from the air for cooling, and then enters the second plate heat exchanger 2161 through the seventh three-way valve 2252 to release heat to the refrigerant. Finally, it is drawn back to the third water pump 2211 through the third three-way valve 2246, the fourth three-way valve 2247, and the fifth three-way valve 2250, forming a low-temperature side circulation. The total circulation of the air conditioning cooling mode consists of refrigerant-side circulation, coolant-side low-temperature circulation, and high-temperature circulation.

[0094] like Figure 4 As shown, when the thermal management system 2 is in battery cooling mode, the two second expansion valves 217 on the refrigerant side are closed, and the two first expansion valves 215 are open; the first water pump 2231 and the second water pump 2221 in the coolant circuit are turned on, and the first shut-off valve 2243, the second shut-off valve 2244 and the fourth shut-off valve 2257 are connected.

[0095] The refrigerant compressor 211 discharges high-temperature, high-pressure gas, which is cooled by coolant in the first plate heat exchanger 2131 and then enters the liquid receiver 214. The saturated liquid refrigerant from the liquid receiver 214 is cooled into a subcooled liquid state by coolant from the fourth shut-off valve 2257. It then passes through two first expansion valves 215 for throttling and pressure reduction, forming a low-temperature, low-pressure two-phase refrigerant. This low-temperature, low-pressure two-phase refrigerant absorbs heat from the coolant in the second plate heat exchanger 2161 and finally becomes a superheated gaseous state before entering the compressor 211, forming a refrigerant-side circulation. The coolant side is divided into a high-temperature side circulation and a low-temperature side circulation. The high-temperature side circulating coolant is driven by the first water pump 2231, enters the radiator 2232 to dissipate heat into the atmosphere, and then enters the electric drive to absorb heat from the motor. The second four-way valve 2242 distributes the high-temperature coolant to the first plate heat exchanger 2131 to cool the high-temperature refrigerant. Then, it flows back to the first water pump 2231 under the control of the first three-way valve 2248, the second three-way valve 2249, and the first four-way valve 2241, forming a high-temperature side circulation. The low-temperature side circulating coolant is driven by the second water pump 2221, enters the battery cold plate for cooling, and then enters the second plate heat exchanger 2161 through the second four-way valve 2242 to absorb heat. Then, it is drawn back to the second water pump 2221 through the third three-way valve 2246, the fourth three-way valve 2247, and the first four-way valve 2241, forming a low-temperature side circulation. The refrigerant side circulation, the low-temperature coolant circulation, and the high-temperature coolant circulation constitute the overall circulation of the battery cooling mode.

[0096] like Figure 6 As shown, when the thermal management system 2 is in air conditioning cooling and battery cooling mode, the two second expansion valves 217 on the refrigerant side are closed and the two first expansion valves 215 are open; the first water pump 2231, the second water pump 2221, and the third water pump 2211 in the coolant circuit are open, the first shut-off valve 2243, the second shut-off valve 2244, and the second control valve 2245 are closed, and the fourth shut-off valve 2257 is open.

[0097] The refrigerant compressor 211 discharges high-temperature, high-pressure gas, which is cooled by coolant in the first plate heat exchanger 2131 and then enters the liquid receiver 214. The saturated liquid refrigerant from the liquid receiver 214 is cooled into a subcooled liquid state by coolant from the fourth shut-off valve 2257, and then passes through two first expansion valves 215 for throttling and pressure reduction to form a low-temperature, low-pressure two-phase refrigerant. The low-temperature, low-pressure two-phase refrigerant absorbs heat from the coolant in the second plate heat exchanger 2161 and finally becomes a superheated gaseous state before entering the compressor 211, forming a refrigerant-side circulation. The coolant side is divided into a high-temperature side circulation, an air conditioning low-temperature side circulation, and a battery cooling low-temperature side circulation. The high-temperature side circulation coolant is driven by the first water pump 2231 and enters the radiator 2232 to dissipate heat into the atmosphere. Then it enters the electric drive system heat exchanger 2233 to absorb the heat of the motor. The second four-way valve 2242 distributes the high-temperature coolant to the first plate heat exchanger 2131 to cool the high-temperature refrigerant. Then it flows back to the first water pump 2231 under the control of the first three-way valve 2248, the second three-way valve 2249, and the first four-way valve 2241, forming a high-temperature side circulation. The air conditioning cooling low-temperature side circulation coolant is driven by the third water pump 2211, sequentially entering the first sub-heat exchanger 2213 and the second sub-heat exchanger 2213 to absorb heat from the air for cooling. Then, it passes through the seventh three-way valve 2252 and enters the second plate heat exchanger 2161 to release heat to the refrigerant. Finally, it passes through the fourth three-way valve 2247 and the fifth three-way valve 2250 and is drawn back to the third water pump 2211, forming the air conditioning cooling low-temperature side circulation. The battery cooling low-temperature side circulation coolant is driven by the second water pump 2221, entering the battery cold plate for cooling. After cooling, it passes through the second four-way valve 2242 and enters the second plate heat exchanger 2161 to absorb heat. Then, it passes through the third three-way valve 2246 and the first four-way valve 2241 and is drawn back to the second water pump 2221, forming the low-temperature side circulation. The refrigerant side circulation, the air conditioning cooling low-temperature side circulation, the battery coolant side low-temperature circulation, and the high-temperature circulation constitute the overall circulation for both air conditioning cooling and battery cooling modes.

[0098] like Figure 3 As shown, when the thermal management system 2 is in heat pump heating mode, the two second expansion valves 217 on the refrigerant side are closed, and the two first expansion valves 215 are open; the first water pump 2231 and the third water pump 2211 in the coolant circuit are open, the first shut-off valve 2243 and the second shut-off valve 2244 are connected, and the second control valve 2245 and the fourth shut-off valve 2257 are closed.

[0099] The refrigerant compressor 211 discharges high-temperature, high-pressure gas, which is cooled by coolant in the first plate heat exchanger 2131 and then enters the liquid receiver 214. The saturated liquid refrigerant from the liquid receiver 214 is throttled and depressurized by two first expansion valves 215 to form a low-temperature, low-pressure two-phase refrigerant. The low-temperature, low-pressure two-phase refrigerant absorbs heat from the coolant in the second plate heat exchanger 2161 and finally becomes a superheated gaseous state before entering the compressor 211, forming a refrigerant-side circulation. The coolant side is divided into a high-temperature side circulation and a low-temperature side circulation. The high-temperature side circulation coolant is driven by the third water pump 2211 and sequentially enters the first sub-heat exchanger 2213 and the second sub-heat exchanger 2213 to heat the air. Then, it enters the first plate heat exchanger 2131 through the seventh three-way valve 2252 to absorb heat from the refrigerant. Finally, it is drawn back to the third water pump 2211 through the first three-way valve 2248, the second three-way valve 2249, and the fifth three-way valve 2250, forming a high-temperature side circulation. The low-temperature circulating coolant is driven by the first water pump 2231, enters the radiator 2232 to absorb heat from the atmospheric environment, and then enters the electric drive to absorb heat from the motor. The second four-way valve 2242 distributes the low-temperature coolant to the second plate heat exchanger 2161 to release heat to the refrigerant. Then, it flows back to the first water pump 2231 under the control of the third three-way valve 2246, the fourth three-way valve 2247, and the first four-way valve 2241, forming a low-temperature side circulation. The refrigerant side circulation, the low-temperature coolant circulation, and the high-temperature circulation constitute the total circulation of the heat pump heating mode.

[0100] like Figure 5 As shown, when the thermal management system 2 is in the extremely low temperature heating mode, the two second expansion valves 217 on the refrigerant side are open and the two first expansion valves 215 are closed; the third water pump 2211 in the coolant circuit is turned on, the first shut-off valve 2243 and the second shut-off valve 2244 are connected, and the second control valve 2245 and the fourth shut-off valve 2257 are closed.

[0101] The refrigerant compressor 211 discharges high-temperature, high-pressure gas, which is cooled by coolant in the first plate heat exchanger 2131 and then enters the liquid receiver 214. The saturated liquid refrigerant from the liquid receiver 214 is throttled and depressurized by the two first expansion valves 215 in a triangular circulation system to form a low-temperature, low-pressure two-phase refrigerant. The low-temperature, low-pressure two-phase refrigerant enters the gas-liquid separator 212 to separate the two phases. The separated gaseous refrigerant enters the compressor 211, forming a refrigerant-side circulation. The coolant in the coolant-side circulation is driven by the third water pump 2211 and sequentially enters the first sub-heat exchanger 2213 and the second sub-heat exchanger 2213 to heat the air. Then, it enters the first plate heat exchanger 2131 through the seventh three-way valve 2252 to absorb heat from the refrigerant. Finally, it is drawn back to the third water pump 2211 through the first three-way valve 2248, the second three-way valve 2249, and the fifth three-way valve 2250, forming a coolant-side circulation. The total circulation of the ultra-low temperature heating mode consists of refrigerant-side circulation and coolant-side circulation.

[0102] like Figure 7 As shown, when the thermal management system 2 is in battery heating mode, the two second expansion valves 217 on the refrigerant side are closed, and the two first expansion valves 215 are open; the first water pump 2231 and the second water pump 2221 in the coolant circuit are turned on, the first shut-off valve 2243 and the second shut-off valve 2244 are connected, and the second control valve 2245 and the fourth shut-off valve 2257 are closed.

[0103] The refrigerant compressor 211 discharges high-temperature, high-pressure gas, which is cooled by the coolant in the first plate heat exchanger 2131 and then enters the liquid receiver 214. The saturated liquid refrigerant from the liquid receiver 214 is throttled and depressurized by two first expansion valves 215 to form a low-temperature, low-pressure two-phase refrigerant. The low-temperature, low-pressure two-phase refrigerant absorbs heat from the coolant in the second plate heat exchanger 2161 and finally becomes a superheated gaseous state before entering the compressor 211, forming a refrigerant-side circulation. The coolant side is divided into a high-temperature side circulation and a low-temperature side circulation. The high-temperature side circulation coolant is driven by the second water pump 2221, enters the battery cold plate to release heat to the battery, and then enters the first plate heat exchanger 2131 through the second four-way valve 2242 to absorb heat from the refrigerant. Finally, it is drawn back to the second water pump 2221 through the first three-way valve 2248, the second three-way valve 2249, and the first four-way valve 2241, forming a high-temperature side circulation. The low-temperature circulating coolant is driven by the first water pump 2231, enters the radiator 2232 to absorb heat from the atmospheric environment, and then enters the electric drive to absorb heat from the motor. The second four-way valve 2242 distributes the low-temperature coolant to the second plate heat exchanger 2161 to release heat to the refrigerant. Then, it flows back to the first water pump 2231 under the control of the third three-way valve 2246, the fourth three-way valve 2247, and the fourth four-way valve, forming a low-temperature side circulation. The refrigerant side circulation, the low-temperature coolant circulation, and the high-temperature circulation constitute the overall circulation of the battery heating mode.

[0104] like Figure 8 As shown, when the thermal management system 2 is in heat pump heating and battery heating mode, the two second expansion valves 217 on the refrigerant side are closed, and the two first expansion valves 215 are open; the first water pump 2231, the second water pump 2221, and the third water pump 2211 in the coolant circuit are open, the first shut-off valve 2243 and the second shut-off valve 2244 are connected, and the second control valve 2245 and the fourth shut-off valve 2257 are closed.

[0105] The refrigerant compressor 211 discharges high-temperature, high-pressure gas, which is cooled by the coolant in the first plate heat exchanger 2131 and then enters the liquid receiver 214. The saturated liquid refrigerant from the liquid receiver 214 is throttled and depressurized by two first expansion valves 215 to form a low-temperature, low-pressure two-phase refrigerant. The low-temperature, low-pressure two-phase refrigerant absorbs heat from the coolant in the second plate heat exchanger 2161 and finally becomes a superheated gaseous state before entering the compressor 211, forming a refrigerant-side circulation. The coolant side is divided into a high-temperature side circulation for heat pump heating, a high-temperature side circulation for battery heating, and a low-temperature side circulation. The high-temperature side circulation coolant of the heat pump heating system is driven by the third water pump 2211, and sequentially enters the first sub-heat exchanger 2213 and the second sub-heat exchanger 2213 to heat the air. Then, it passes through the seventh three-way valve 2252 and enters the first plate heat exchanger 2131 to absorb heat from the refrigerant. Finally, it passes through the second three-way valve 2249 and the fifth three-way valve 2250 and is drawn back to the third water pump 2211, forming the high-temperature side circulation of the heat pump heating system. The high-temperature side circulation coolant of the battery heating system is driven by the second water pump 2221, and enters the battery cold plate to release heat to the battery. Then, it passes through the second four-way valve 2242 and enters the first plate heat exchanger 2131 to absorb heat from the refrigerant. Finally, it passes through the first three-way valve 2248 and the first four-way valve 2241 and is drawn back to the second water pump 2221, forming the high-temperature side circulation of the battery heating system. The low-temperature circulating coolant is driven by the first water pump 2231, enters the radiator 2232 to absorb heat from the atmospheric environment, and then enters the electric drive to absorb heat from the motor. The second four-way valve 2242 distributes the low-temperature coolant to the second plate heat exchanger 2161 to release heat to the refrigerant. Then, it flows back to the first water pump 2231 under the control of the third three-way valve 2246, the fourth three-way valve 2247, and the first four-way valve 2241, forming a low-temperature side circulation. The refrigerant side circulation, the low-temperature coolant circulation, the high-temperature heat pump heating circulation, and the high-temperature battery heating circulation constitute the overall circulation of the heat pump heating and battery heating modes.

[0106] like Figure 9 As shown, when the thermal management system 2 is in heat pump heating and battery cooling mode, the two second expansion valves 217 on the refrigerant side are closed and the two first expansion valves 215 are open; the second water pump 2221 and the third water pump 2211 in the coolant circuit are open, the first shut-off valve 2243 and the second shut-off valve 2244 are connected, and the second control valve 2245 and the fourth shut-off valve 2257 are closed.

[0107] The refrigerant compressor 211 discharges high-temperature, high-pressure gas, which is cooled by the coolant in the first plate heat exchanger 2131 and then enters the liquid receiver 214. The saturated liquid refrigerant from the liquid receiver 214 is throttled and depressurized by two first expansion valves 215 to form a low-temperature, low-pressure two-phase refrigerant. The low-temperature, low-pressure two-phase refrigerant absorbs heat from the coolant in the second plate heat exchanger 2161 and finally becomes a superheated gaseous state before entering the compressor 211, forming a refrigerant-side circulation. The coolant side is divided into a high-temperature side circulation and a low-temperature side circulation. The high-temperature side circulating coolant is driven by the third water pump 2211, sequentially entering the first sub-heat exchanger 2213 and the second sub-heat exchanger 2213 to heat the air. Then, it passes through the seventh three-way valve 2252 into the first plate heat exchanger 2131 to absorb heat from the refrigerant. Finally, it passes through the first three-way valve 2248, the second three-way valve 2249, and the fifth three-way valve 2250 before being drawn back to the third water pump 2211, forming a high-temperature side circulation. The low-temperature side circulating coolant is driven by the second water pump 2221, entering the battery cooling plate for cooling. It then passes through the second four-way valve 2242 into the second plate heat exchanger 2161 to absorb heat, and then passes through the third three-way valve 2246, the fourth three-way valve 2247, and the first four-way valve 2241 before being drawn back to the second water pump 2221, forming a low-temperature side circulation. The refrigerant-side circulation, the low-temperature coolant circulation, and the high-temperature circulation constitute the overall circulation of the heat pump heating + battery cooling mode.

[0108] like Figure 10 As shown, when the thermal management system 2 is in dehumidification mode, the two second expansion valves 217 on the refrigerant side are closed, and the two first expansion valves 215 are open; the first water pump 2231 and the third water pump 2211 in the coolant circuit are turned on, the first shut-off valve 2243, the second shut-off valve 2244 and the second control valve 2245 are connected, and the fourth shut-off valve 2257 is closed.

[0109] The refrigerant compressor 211 discharges high-temperature, high-pressure gas, which is cooled by the coolant in the first plate heat exchanger 2131 and then enters the liquid receiver 214. The saturated liquid refrigerant from the liquid receiver 214 is throttled and depressurized by two first expansion valves 215 to form a low-temperature, low-pressure two-phase refrigerant. The low-temperature, low-pressure two-phase refrigerant absorbs heat from the coolant in the second plate heat exchanger 2161 and finally becomes a superheated gaseous state before entering the compressor 211, forming a refrigerant-side circulation. The coolant side is divided into a high-temperature side circulation and a low-temperature side circulation. The high-temperature side circulating coolant is driven by the first water pump 2231, enters the second sub-heat exchanger 2213 through the first control valve 2251 to heat the air, then enters the first plate heat exchanger 2131 through the seventh three-way valve 2252 to absorb heat from the refrigerant, and finally is drawn back to the first water pump 2231 through the first three-way valve 2248, the second three-way valve 2249, and the first four-way valve 2241, forming a high-temperature side circulation. The low-temperature side circulating coolant is driven by the third water pump 2211, enters the first sub-heat exchanger 2213 to cool the air, then enters the second plate heat exchanger 2161 through the second control valve 2245 and the first shut-off valve 2243 to absorb heat, and then is drawn back to the third water pump 2211 through the third three-way valve 2246, the fourth three-way valve 2247, and the fifth three-way valve 2250, forming a low-temperature side circulation. The refrigerant side circulation, the low-temperature coolant circulation, and the high-temperature circulation constitute the overall circulation of the dehumidification cooling and heating mode.

[0110] This application also provides an air conditioning system. The air conditioning system 10 includes a thermal management system 2, the specific structure of which is as described in the above embodiments. Since this air conditioning system 10 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0111] This application also provides a vehicle. For example... Figure 12 As shown, vehicle 1 includes a thermal management system 2 and / or an air conditioning system 10. The specific structure of the thermal management system 2 and / or the air conditioning system 10 is as described in the above embodiments. Since vehicle 1 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0112] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0113] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0114] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0115] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A thermal management system, characterized in that, include: A temperature control loop includes a compressor, a first plate heat exchanger assembly, a first expansion valve, and a second plate heat exchanger assembly. The output end of the compressor is connected to the input end of the first plate heat exchanger assembly. The first expansion valve is connected between the output end of the first plate heat exchanger assembly and the input end of the second plate heat exchanger assembly. The output end of the second plate heat exchanger assembly is connected to the input end of the compressor. At least one of the first plate heat exchanger assembly and the second plate heat exchanger assembly includes at least two plate heat exchangers connected in parallel. A heat exchange circuit is connected to the at least two plate heat exchangers, the heat exchange circuit being adapted to exchange heat with the at least two plate heat exchangers.

2. The thermal management system as described in claim 1, characterized in that, The at least two plate heat exchangers are fixedly connected together.

3. The thermal management system as described in claim 1, characterized in that, The first plate heat exchanger assembly includes at least two first plate heat exchangers, and the heat exchange loop is connected to the at least two first plate heat exchangers and is adapted to exchange heat with the at least two first plate heat exchangers; the second plate heat exchanger assembly includes at least two second plate heat exchangers, and the heat exchange loop is connected to the two second plate heat exchangers and is adapted to exchange heat with the at least two second plate heat exchangers.

4. The thermal management system as described in claim 3, characterized in that, The heat exchange loop includes a first sub-heat exchange loop, which is connected to at least one first plate heat exchanger and / or at least one second plate heat exchanger. The first sub-heat exchange loop is adapted to exchange heat with at least one first plate heat exchanger or at least one second plate heat exchanger, and / or... The heat exchange loop includes a second sub-heat exchange loop, which is connected to at least one first plate heat exchanger and / or at least one second plate heat exchanger. The second sub-heat exchange loop is adapted to exchange heat with at least one first plate heat exchanger or at least one second plate heat exchanger.

5. The thermal management system as described in claim 4, characterized in that, The first sub-heat exchange circuit includes an in-vehicle heat exchanger, and / or the second sub-heat exchange circuit includes a battery heat exchanger.

6. The thermal management system as described in claim 4, characterized in that, The first sub-heat exchange circuit includes an in-vehicle heat exchanger; the in-vehicle heat exchanger includes two sub-heat exchangers; The first sub-heat exchange loop is adapted to connect the two sub-heat exchangers to at least one first plate heat exchanger or at least one second plate heat exchanger, and the first sub-heat exchange loop is adapted to allow the two sub-heat exchangers to exchange heat with at least one first plate heat exchanger or at least one second plate heat exchanger, or... The first sub-heat exchange loop is adapted to connect one of the sub-heat exchangers to at least one first plate heat exchanger and to connect the other sub-heat exchanger to at least one second plate heat exchanger. The first sub-heat exchange loop is adapted to allow one of the sub-heat exchangers to exchange heat with at least one first plate heat exchanger, and the first sub-heat exchange loop is adapted to allow the other sub-heat exchanger to exchange heat with at least one second plate heat exchanger. Alternatively, A first control valve is provided between the two sub-heat exchangers. The first control valve is connected to at least one first plate heat exchanger and is adapted to control the on / off connection between the downstream sub-heat exchanger and at least one first plate heat exchanger. The output end of the upstream sub-heat exchanger is also connected to at least one second plate heat exchanger via a second control valve and is adapted to control the on / off connection between the upstream sub-heat exchanger and at least one second plate heat exchanger.

7. The thermal management system as described in claim 4, characterized in that, The heat exchange circuit further includes a switching assembly connected to the first sub-heat exchange circuit and / or the second sub-heat exchange circuit; The switching assembly is adapted to control the on / off connection between the first sub-heat exchange loop and / or the second sub-heat exchange loop and the at least two first plate heat exchangers, and / or, The switching assembly is adapted to control the on / off connection between the first sub-heat exchange circuit and / or the second sub-heat exchange circuit and the at least two second plate heat exchangers.

8. The thermal management system as described in claim 7, characterized in that, The switching assembly includes a first control valve group connected to the at least two first plate heat exchangers, a first sub-heat exchange loop and / or a second sub-heat exchange loop connected to the first control valve group, and the first control valve group being adapted to control the on / off connection between the first sub-heat exchange loop and / or the second sub-heat exchange loop and the at least two first plate heat exchangers, and / or... The switching assembly includes a second control valve group connected to the at least two second plate heat exchangers, wherein the first sub-heat exchange loop and / or the second sub-heat exchange loop are connected to the second control valve group, and the second control valve group is adapted to control the on / off connection between the first sub-heat exchange loop and / or the second sub-heat exchange loop and the at least two second plate heat exchangers, and / or... The switching assembly includes a first control valve group connected to the at least two first plate heat exchangers. The first control valve group includes a first three-way valve, a second three-way valve, a first check valve, and a second check valve. The first port of the first three-way valve is connected to the coolant inlet of one of the first plate heat exchangers; the second port of the first three-way valve is connected to the output of the second sub-heat exchange loop and the first check valve; and the third port of the first three-way valve is connected to the input of the first check valve, the input of the second check valve, and the third port of the second three-way valve. The first port of the second three-way valve is connected to the coolant inlet of the other first plate heat exchanger; the second port of the second three-way valve is connected to the output of the first sub-heat exchange loop and the second check valve; and the third port of the second three-way valve is connected to the input of the first check valve and the input of the second check valve, and / or... The switching assembly includes a second control valve group connected to the at least two second plate heat exchangers. The second control valve assembly includes a third three-way valve, a fourth three-way valve, a third check valve, and a fourth check valve. The first port of the third three-way valve is connected to the coolant inlet of one of the second plate heat exchangers. The second port of the third three-way valve is connected to the output of the second sub-heat exchange loop and the third check valve. The third port of the third three-way valve is connected to the input of the third check valve, the input of the fourth check valve, and the third port of the fourth three-way valve. The first port of the fourth three-way valve is connected to the coolant inlet of the other second plate heat exchanger. The second port of the fourth three-way valve is connected to the first port of the first sub-heat exchange loop and the output of the fourth check valve. The third port of the fourth three-way valve is connected to the input of the third check valve and the input of the fourth check valve.

9. The thermal management system as described in claim 1, characterized in that, The thermal management system further includes a subcooler connected between the output end of the first plate heat exchanger assembly and the first expansion valve.

10. The thermal management system as described in claim 9, characterized in that, The heat exchange circuit also includes a third sub-heat exchange circuit, which is connected to the subcooler to cool the temperature regulating medium passing through the subcooler.

11. The thermal management system as described in claim 1, characterized in that, The heat exchange circuit further includes a third sub-heat exchange circuit, which is connected to at least one first plate heat exchanger and / or at least one second plate heat exchanger, and is adapted to exchange heat with at least one first plate heat exchanger and / or at least one second plate heat exchanger. The third sub-heat exchange circuit is suitable for cooling the electric drive system.

12. The thermal management system as described in claim 11, characterized in that, The third sub-heat exchange loop includes a radiator and an electric drive system heat exchanger, the radiator being connected to the electric drive system heat exchanger, and the electric drive system heat exchanger being adapted to cool the electric drive system.

13. The thermal management system according to any one of claims 1 to 12, characterized in that, The temperature regulation circuit also includes a second expansion valve, the input end of which is connected to the output end of the first plate heat exchanger assembly, and the output end of which is connected to the input end of the compressor.

14. An air conditioning system, characterized in that, The thermal management system includes any one of claims 1 to 13.

15. A vehicle, characterized in that, It includes the thermal management system according to any one of claims 1 to 13, and / or includes the air conditioning system according to claim 14.

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