A collaborative thermal management system for electric vehicles based on a cross-refrigerant compatible architecture

Abstract

The present invention is applicable to the field of thermal management technology for electric vehicles, and provides an electric vehicle collaborative thermal management system based on a cross-refrigerant compatible architecture, including: a refrigerant circuit, a passenger compartment thermal management system, a power battery thermal management system, an electric drive thermal management system, and a radiator. The passenger compartment thermal management system, the power battery thermal management system, the electric drive thermal management system, and the radiator are connected in different modes through a nine-way water valve. A cross-refrigerant compatibility module unit is integrated into the passenger compartment thermal management module and three integration schemes are proposed. While ensuring that the nine-way water valve connection mode remains consistent in each mode, the series connection of the cold air core and the warm air core in the passenger compartment thermal management circuit is achieved, thereby improving the performance of the thermal management system under extreme summer working conditions. This system architecture is compatible with the R134a platform and the R290 platform, as a new type of thermal management system that can easily switch between different refrigerant platforms.

Description

Technical Field

[0001] The present invention belongs to the technical field of thermal management of electric vehicles, and in particular relates to a collaborative thermal management system for electric vehicles based on a cross-refrigerant compatible architecture. Background Art

[0002] Currently, traditional refrigerants, such as R134a (GWP = 1430), face strict usage restrictions due to their high environmental impact. Against this backdrop, R290 (propane, GWP = 3), with its inherent environmental friendliness, has become an industry focus and has been included in the thermal management system technology roadmaps of many OEMs. However, R290's flammability places stringent demands on electric vehicle heat pump systems: existing direct heat pump architectures pose a risk of leakage (concentrations exceeding the lower flammability limit (LFL) of 0.38 vol%) can cause explosions, forcing the industry to shift to indirect heat pump technologies (such as secondary heat exchange systems for coolant and refrigerant). While this shift improves safety, it also results in cooling capacity reductions of up to 18% to 25% (compared to direct R134a systems). This makes it difficult to meet the cooling needs of the passenger compartment, power battery, and electric drive, especially under high-temperature driving conditions.

[0003] At the same time, given that the commercial application of R290 remains constrained by the completeness of safety standards and the maturity of the industry chain, some manufacturers are pursuing a "gradual replacement" approach. They aim to develop a cross-refrigerant-compatible heat pump architecture that can maintain the performance of the proven R134a refrigerant currently while enabling rapid adaptation to R290 through modular retrofitting when regulatory mandates arise, minimizing system upgrade costs. The core technical challenge in this demand lies in the significant differences in physical properties between R134a and R290 (such as pressure curves, latent heat of phase change, and lubricant compatibility), making seamless switching between the two impossible with traditional fixed heat pump architectures. For example, in terms of cooling capacity, the evaporation temperature of R290 in an indirect system must be reduced by 5 to 8°C to match the performance of R134a, but this approach increases compressor power consumption by 12% to 15%. Therefore, an innovative system architecture is urgently needed to address the cross-refrigerant compatibility requirements of electric vehicle thermal management systems through dynamic flow path reconfiguration and control strategy optimization. Summary of the Invention

[0004] The purpose of the present invention is to provide an electric vehicle collaborative thermal management system based on a cross-refrigerant compatible architecture, aiming to solve the technical problems existing in the prior art identified in the background technology.

[0005] The present invention is implemented as follows: a collaborative thermal management system for electric vehicles based on a cross-refrigerant compatible architecture, including the following core designs:

[0006] Modular architecture design

[0007] Refrigerant integrated module: A refrigerant circulation loop is constructed through an electric compressor, double-plate heat exchanger, liquid storage tank and electronic expansion valve, supporting dual-platform compatibility of R134a and R290.

[0008] Water-side integrated module: Using a nine-way water valve as the core, it dynamically adjusts the coolant flow direction, connects the passenger compartment thermal management module, power battery thermal management module, electric drive thermal management module and front-end cooling module to achieve coordinated control of multiple working conditions.

[0009] Cross-refrigerant compatibility module unit

[0010] HVAC assembly optimization: Integrate the cooling and heating cores into the passenger compartment thermal management module, and achieve flow switching through a three-way water valve or an integrated multi-way valve (such as a four-way, five-way, or six-way water valve).

[0011] Refrigerant adaptation control:

[0012] R134a mode: Connect the cooling core and the heating core in series to release the latent heat of refrigerant phase change in stages, increasing the cooling capacity utilization rate by 15% and 20%;

[0013] R290 mode: Choose to have the cold air core work alone (mild cooling) or in series with the warm air core (fast cooling) based on demand, using the high cooling capacity of R290 to reduce system energy consumption.

[0014] Multi-objective collaborative control strategy

[0015] Dynamic flow regulation: Through the linkage of the nine-way water valve and the three-way water valve, the coolant distribution for passenger compartment cooling, power battery cooling and electric drive heat dissipation is balanced.

[0016] Temperature closed-loop control: Based on the power battery coolant inlet temperature feedback, the second three-way water valve opening is adjusted to ensure that the battery temperature is stable below 25°C.

[0017] Three integration solutions

[0018] Solution 1: Simplify the original four-valve structure with a four-way water valve, a three-way water valve and a two-way ball valve;

[0019] Option 2: Use a five-way water valve and a three-way water valve to integrate the flow path;

[0020] Option 3: Achieve full-function integration with a single six-way water valve to further reduce system complexity.

[0021] The beneficial effects of the present invention are:

[0022] 1. R290 has a GWP of only 3, which is 99.7% lower than traditional R134a (GWP=1430). It also poses no risk of ozone layer depletion and fully complies with international environmental regulations.

[0023] 2. Indirect heat pump technology isolates the combustible refrigerant from the passenger compartment through secondary heat exchange between coolant and refrigerant. This technology enables the large-scale application of R290 while ensuring safety, accelerating the industry's transition toward carbon neutrality.

[0024] 3. By connecting the cold air core and the warm air core in series, the latent heat of the refrigerant phase change is released in stages, increasing the cooling capacity utilization rate by 15% and 20%, effectively compensating for the cooling attenuation problem of the indirect system;

[0025] 5. Propose a gradual replacement path, currently using R134a to ensure performance, and seamlessly switch to R290 through the design of an early cross-refrigerant compatibility architecture to respond to the 2030 GWP>150 refrigerant ban regulations. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic structural diagram of an electric vehicle thermal management system based on a cross-refrigerant compatible architecture provided by an embodiment of the present invention;

[0027] Figure 2 A schematic structural diagram of a first integrated solution for an electric vehicle thermal management system based on a cross-refrigerant compatible architecture provided by an embodiment of the present invention;

[0028] Figure 3 A schematic diagram of a second integrated solution for an electric vehicle thermal management system based on a cross-refrigerant compatible architecture provided by an embodiment of the present invention;

[0029] Figure 4 A schematic structural diagram of a third integrated solution for an electric vehicle thermal management system based on a cross-refrigerant compatible architecture provided by an embodiment of the present invention;

[0030] Figure 5 A schematic diagram of the structure of an electric vehicle thermal management system based on a cross-refrigerant compatible architecture for cooling the passenger compartment on an R134a platform, provided by an embodiment of the present invention;

[0031] Figure 6 A schematic diagram of the structure of an integrated solution for an electric vehicle thermal management system based on a cross-refrigerant compatible architecture, providing passenger compartment cooling, power battery cooling, and electric drive heat dissipation on an R134a platform, provided by an embodiment of the present invention;

[0032] Figure 7 A schematic diagram of the structure of a second integrated solution for an electric vehicle thermal management system based on a cross-refrigerant compatible architecture for passenger compartment cooling, power battery cooling, and electric drive heat dissipation on an R134a platform, provided by an embodiment of the present invention;

[0033] Figure 8A schematic diagram of the structure of an electric vehicle thermal management system integration solution 3 based on a cross-refrigerant compatible architecture for passenger compartment cooling, power battery cooling, and electric drive heat dissipation on an R134a platform, provided by an embodiment of the present invention;

[0034] Figure 9 A schematic diagram of the structure of an electric vehicle thermal management system based on a cross-refrigerant compatible architecture provided by an embodiment of the present invention for rapid cooling of the passenger compartment, power battery cooling, and electric drive heat dissipation on an R290 platform;

[0035] Figure 10 A schematic diagram of the structure of an electric vehicle thermal management system integration solution based on a cross-refrigerant compatible architecture, which provides rapid cooling of the passenger compartment, power battery cooling, and electric drive heat dissipation on the R290 platform, provided by an embodiment of the present invention;

[0036] Figure 11 A schematic diagram of the structure of a second integrated solution for an electric vehicle thermal management system based on a cross-refrigerant compatible architecture, providing rapid cooling of the passenger compartment, power battery cooling, and electric drive heat dissipation on an R290 platform, provided by an embodiment of the present invention;

[0037] Figure 12 This is a schematic structural diagram of an electric vehicle thermal management system integration solution three based on a cross-refrigerant compatible architecture for rapid cooling of the passenger compartment, power battery cooling, and electric drive heat dissipation on the R290 platform provided by an embodiment of the present invention.

[0038] In the attached figure: 11. Electric compressor; 12. First plate heat exchanger; 13. Liquid storage tank; 14. Electronic expansion valve; 15. Second plate heat exchanger; 21. Warm air water pump; 22. Cold air water pump; 23. Power battery water pump; 24. Electric drive water pump; 31. First three-way water valve; 32. Second three-way water valve; 321. Two-way ball valve; 331. Third three-way water valve; 332. Fourth three-way water valve; 333. Fifth three-way water valve; 341. Four-way water valve; 351. Five-way water valve; 361. Six-way water valve; 41. Blower; 42. Cold air core; 43. Warm air core; 51. Power battery; 61. Electric drive; 71. Radiator; 81. Expansion kettle; 91. Nine-way water valve. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0040] like Figure 1As shown, an electric vehicle thermal management system based on a cross-refrigerant compatible architecture provided by one embodiment of the present invention includes a refrigerant integration module, a water side integration module, a passenger compartment thermal management module, a power battery 51 system thermal management module, an electric drive 61 system thermal management module, a front-end cooling module, and an expansion kettle 81 module, characterized in that:

[0041] The refrigerant integrated module includes an electric compressor 11, a first plate heat exchanger 12, a liquid storage tank 13, an electronic expansion valve 14 and a second plate heat exchanger 15, wherein the first plate heat exchanger 12 and the second plate heat exchanger 15 both have a refrigerant side and a coolant side, the outlet of the compressor is connected to the refrigerant side port 1 of the first plate heat exchanger 12, the refrigerant side port 2 of the first plate heat exchanger 12 is connected to the inlet of the liquid storage tank 13, the outlet of the liquid storage tank 13 is connected to the port 1 of the electronic expansion valve 14, the port 2 of the electronic expansion valve 14 is connected to the refrigerant side port 1 of the second plate heat exchanger 15, and the refrigerant side port 2 of the second plate heat exchanger 15 is connected to the inlet of the compressor.

[0042] The water side integrated module includes a nine-way water valve 91, a first three-way water valve 31, a second three-way water valve 32 and a warm air water pump 21, wherein port six of the nine-way water valve 91 is connected to the pipeline intersection A, the pipeline intersection A is connected to port three of the first three-way water valve 31, port four of the nine-way water valve 91 is connected to port two of the first three-way water valve 31, port eight of the nine-way water valve 91 is connected to the pipeline intersection H, port two of the nine-way water valve 91 is connected to the inlet of the warm air water pump 21, port five of the nine-way water valve 91 is connected to port one of the second three-way water valve 32, port three of the nine-way water valve 91 is connected to the pipeline intersection G, port nine of the nine-way water valve 91 is connected to the pipeline intersection D, port seven of the nine-way water valve 91 is connected to the front-end cooling module, and port one of the nine-way water valve 91 is connected to the electric drive 61 dynamic thermal management module.

[0043] The passenger compartment thermal management module includes a passenger compartment HVAC assembly and a cross-refrigerant compatibility module unit, the passenger compartment HVAC assembly includes a blower 41, a warm air core 43, and a cold air core 42, and the cross-refrigerant compatibility module unit includes a third three-way water valve 331, a fourth three-way water valve 332, and a fifth three-way water valve 333, wherein the blower 41 is placed at the air inlet of the warm air core 43 and the cold air core 42, the port one of the warm air core 43 is connected to the pipe intersection point I, the pipe intersection point I is connected to the port three of the third three-way water valve 331, the pipe intersection point I is connected to the port one of the fourth three-way water valve 332, and the port two of the third three-way water valve 331 is connected to the pipe intersection point I. The pipeline intersection point H is connected, port 1 of the third three-way water valve 331 is connected to port 1 of the first plate heat exchanger 12, port 2 of the fourth three-way water valve 332 is connected to port 1 of the cold air core 42, port 3 of the fourth three-way water valve 332 is connected to the pipeline intersection point J, the pipeline intersection point H is connected to port 2 of the fifth three-way water valve 333, port 1 of the fifth three-way water valve 333 is connected to the pipeline intersection point J, port 3 of the fifth three-way water valve 333 is connected to port 2 of the warm air core 43, the pipeline intersection point J is connected to port 3 of the second three-way water valve 32, and port 2 of the second three-way water valve 32 is connected to port 1 of the second plate heat exchanger 15.

[0044] The power battery 51 system thermal management module includes a power battery 51 and a battery water pump, wherein the water outlet of the power battery 51 is connected to the pipeline intersection C, the pipeline intersection C is connected to port one of the third three-way water valve 331, the pipeline intersection C is connected to the pipeline intersection B, the port three of the third three-way water valve 331 is connected to the pipeline intersection A, the pipeline intersection A is connected to the pipeline intersection B, the pipeline intersection B is connected to the pipeline intersection E, the pipeline intersection E is connected to the battery water pump inlet, and the battery water pump outlet is connected to the water inlet of the power battery 51.

[0045] The electric drive 61 power system thermal management module includes an electric drive 61 and an electric drive water pump 24, wherein the water outlet of the electric drive 61 is connected to port 1 of the nine-way water valve 91, the water inlet of the electric drive 61 is connected to the water outlet of the electric drive water pump 24, the water outlet of the electric drive water pump 24 is connected to the pipeline intersection F, and the pipeline intersection F is connected to the pipeline intersection D.

[0046] The front-end cooling module includes a radiator 71 , wherein one end of the radiator 71 is connected to port seven of the nine-way water valve 91 , and the other end of the radiator 71 is connected to a pipe intersection point D, which is connected to port nine of the nine-way water valve 91 .

[0047] The expansion water pot 81 module includes an expansion water pot 81 , wherein one end of the expansion water pot 81 is connected to the pipeline intersection point E, and the other end of the expansion water pot 81 is connected to the pipeline intersection point F.

[0048] like Figure 1 As shown, on the R134a platform, when cooling the passenger cabin in summer, the cooling capacity is improved by connecting the cold air core 42 and the warm air core 43 in series; on the R290 platform, since the inherent physical properties of R290 determine that its cooling capacity is higher than that of R134a, it can be ensured that when cooling the passenger cabin in summer, the passenger cabin can be cooled by only using the cold air core 42 to achieve heat exchange with the air in the passenger cabin. At the same time, the cold air core 42 and the warm air core 43 can be connected in series to increase the heat exchange area between the coolant and the air in the passenger cabin and achieve rapid cooling of the passenger cabin.

[0049] like Figure 1 As shown, an electric vehicle thermal management system based on a cross-refrigerant compatibility architecture is characterized in that the cross-refrigerant compatibility module unit in the passenger compartment thermal management module can be further integrated. Specifically, there are three integration schemes, which can reduce the number of water valves in the cross-refrigerant compatibility module unit.

[0050] like Figures 2-4 As shown, three integration schemes of cross-refrigerant compatibility module units in the passenger compartment thermal management module are characterized in that:

[0051] In the integrated solution 1, port 1 of the two-way ball valve 321 is connected to the pipeline intersection H, port 2 of the two-way ball valve 321 is connected to the pipeline intersection J, port 3 of the third three-way water valve 331 is connected to the pipeline intersection I, port 2 of the third three-way water valve 331 is connected to the pipeline intersection H, port 1 of the third three-way water valve 331 is connected to the coolant test port 1 of the first plate heat exchanger 12, port 1 of the four-way water valve 341 is connected to the pipeline intersection I, port 2 of the four-way water valve 341 is connected to the pipeline intersection J, port 3 of the four-way water valve 341 is connected to port 3 of the second three-way water valve 32, and port 4 of the four-way water valve 341 is connected to port 1 of the cold air core 42;

[0052] In the second integrated solution, port 1 of the third three-way water valve 331 is connected to port 8 of the nine-way water valve 91, port 2 of the third three-way water valve 331 is connected to the pipeline intersection I, port 3 of the third three-way water valve 331 is connected to the pipeline intersection H, pipeline intersection I is connected to port 2 of the warm air core 43, pipeline intersection H is connected to coolant side port 1 of the first plate heat exchanger 12, port 1 of the five-way water valve 351 is connected to port 1 of the warm air core 43, port 2 of the five-way water valve 351 is connected to pipeline intersection I, port 3 of the five-way water valve 351 is connected to port 3 of the second three-way water valve 32, port 4 of the five-way water valve 351 is connected to port 1 of the cold air core 42, port 2 of the cold air core 42 is connected to the pipeline intersection G, and port 5 of the five-way water valve 351 is connected to the pipeline intersection H;

[0053] Based on the system architecture of integrated solution three, port one of the six-way water valve 361 is connected to port eight of the nine-way water valve 91, port two of the six-way water valve 361 is connected to port two of the warm air core 43, port three of the six-way water valve 361 is connected to port three of the second three-way water valve 32, port four of the six-way water valve 361 is connected to port one of the cold air core 42, port two of the cold air core 42 is connected to the pipeline intersection G, port five of the six-way water valve 361 is connected to port one of the coolant side of the first plate heat exchanger 12, and port six of the six-way water valve 361 is connected to port one of the warm air core 43.

[0054] like Figures 1 to 4 As shown, the cross-refrigerant compatibility module unit in the passenger compartment thermal management module is characterized in that the cross-refrigerant compatibility module unit can be arranged in two optional ways. One arrangement is to modify the conventional HVAC assembly to form the cross-refrigerant compatibility module unit inside the HVAC assembly, and the other is to form a separate hardware unit that is externally mounted on the outside of the conventional HVAC assembly shell.

[0055] like Figures 1 to 4 As shown, the control method of the cross-refrigerant compatibility module unit in the passenger compartment thermal management module and its three integrated solutions is characterized in that the control method is used to control the electric vehicle thermal management system to meet high-load cooling requirements under high-temperature driving conditions in summer, mainly in the passenger compartment cooling, power battery 51 cooling, and electric drive 61 heat dissipation modes. At the same time, the control method has the following differences due to different cross-refrigerant compatibility module units:

[0056] When the refrigerant of the electric vehicle thermal management system adopts R134a, the cross-refrigerant compatibility module unit is controlled to realize the series connection of the cold air core 42 and the warm air core 43 under the demand of the driver for cooling the passenger compartment, and the power battery 51 is cooled and the electric drive 61 is dissipated at the same time;

[0057] When the refrigerant of the electric vehicle thermal management system adopts R290, there are two control methods according to the driver's demand for cooling the passenger compartment. One is to control the cross-refrigerant compatibility module unit to realize the series connection of the cold air core 42 and the warm air core 43 under the demand for rapid cooling. The other is to control the cross-refrigerant compatibility module unit to realize the cold air core 42 working alone under the demand for mild cooling, and cool the power battery 51 and dissipate heat from the electric drive 61 at the same time.

[0058] like Figure 5As shown, as a preferred embodiment of the present invention, in the R134a platform passenger compartment cooling, power battery 51 cooling, and electric drive 61 heat dissipation mode, the refrigerant integration module starts the electric compressor 11, and the high-temperature and high-pressure refrigerant flows out through the outlet of the electric compressor 11 and flows into the refrigerant side port 1 of the first plate heat exchanger 12, flows out through the refrigerant side port 2 of the first plate heat exchanger 12 and enters the inlet of the liquid storage tank 13, flows out through the outlet of the liquid storage tank 13 and enters the port 1 of the electronic expansion valve 14, flows out through the port 2 of the electronic expansion valve 14 and enters the refrigerant side port 1 of the second plate heat exchanger 15, and flows out through the refrigerant side port 2 of the second plate heat exchanger 15 and enters the inlet of the electric compressor 11; the warm air water pump 21 is started, and the coolant enters the first plate heat exchanger 12 under the drive of the warm air water pump 21. The coolant side port 2 of the plate heat exchanger 12 flows out through the coolant side port 1 of the first plate heat exchanger 12 and enters the port 1 of the third three-way water valve 331, flows out through the port 2 of the third three-way water valve 331 and enters the port 6 of the nine-way water valve 91, the port 6 of the nine-way water valve 91 is connected with the port 7 of the nine-way water valve 91, the coolant flows out through the port 7 of the nine-way water valve 91 and enters the inlet of the radiator 71, flows out through the outlet of the radiator 71 and enters the inlet of the electric drive water pump 24, flows out through the outlet of the electric drive water pump 24 and enters the coolant inlet of the electric drive 61, flows out through the coolant outlet of the electric drive 61 and enters the port 1 of the nine-way water valve 91, the port 1 of the nine-way water valve 91 is connected with the port 2 of the nine-way water valve 91, and the coolant flows out through the port 2 of the nine-way water valve 91 and enters the inlet of the heater water pump 21;Start the cold air water pump 22. Driven by the cold air water pump 22, the coolant enters the coolant side port 2 of the second plate heat exchanger 15, flows out through the coolant side port 1 of the second plate heat exchanger 15, enters the port 2 of the second three-way water valve 32, flows out through the port 1 of the second three-way water valve 32, enters the port 5 of the nine-way water valve 91, and the port 5 of the nine-way water valve 91 is connected to the port 6 of the nine-way water valve 91. The coolant flows out through the port 6 of the nine-way water valve 91 and enters the battery water pump inlet. The water flows out of the pool pump outlet and enters the coolant inlet of the power battery 51, flows out through the coolant outlet of the power battery 51 and enters the port 1 of the first three-way water valve 31, flows out through the port 2 of the first three-way water valve 31 and enters the port 4 of the nine-way water valve 91, and the coolant flowing out through the port 3 of the first three-way water valve 31 and the coolant flowing out through the port 6 of the nine-way water valve 91 are mixed so that the power battery 51 self-detects the coolant inlet water temperature at 25°C, and adjusts the coolant flow rate of the port 1 of the second three-way water valve 32 accordingly. If the power battery 51 still cannot achieve the self-detection coolant inlet water temperature of 25°C when the port 3 of the first three-way water valve 31 is fully closed, increase the opening of the port 1 of the second three-way water valve 32. Otherwise, reduce the opening of the port 1 of the second three-way water valve 32. The port 4 of the nine-way water valve 91 is connected to the port 3 of the nine-way water valve 91. The coolant flows out through the port 2 of the first three-way water valve 31 and enters the port 4 of the nine-way water valve 91. The coolant flows out through the port 3 of the nine-way water valve 91. The coolant enters the inlet of the cold air water pump 22, and simultaneously flows out through port 3 of the second three-way water valve 32 and into port 1 of the fifth three-way water valve 333. It then flows out through port 3 of the fifth three-way water valve 333 and into port 2 of the heater core 43. It then flows out through port 1 of the heater core 43 and into port 1 of the fourth three-way water valve 332. It then flows out through port 2 of the fourth three-way water valve 332 and into port 1 of the cold air core 42. It then flows out through port 2 of the cold air core 42 and into the inlet of the cold air water pump 22.

[0059] like Figure 6As shown, as a preferred embodiment of the present invention, in the R134a platform passenger compartment cooling, power battery 51 cooling, and electric drive 61 heat dissipation mode, the refrigerant integration module starts the electric compressor 11, and the high-temperature and high-pressure refrigerant flows out through the outlet of the electric compressor 11 and flows into the refrigerant side port 1 of the first plate heat exchanger 12, flows out through the refrigerant side port 2 of the first plate heat exchanger 12 and enters the inlet of the liquid storage tank 13, flows out through the outlet of the liquid storage tank 13 and enters the port 1 of the electronic expansion valve 14, flows out through the port 2 of the electronic expansion valve 14 and enters the refrigerant side port 1 of the second plate heat exchanger 15, and flows out through the refrigerant side port 2 of the second plate heat exchanger 15 and enters the inlet of the electric compressor 11; the warm air water pump 21 is started, and the coolant enters the first plate heat exchanger 12 under the drive of the warm air water pump 21. The coolant side port 2 of the plate heat exchanger 12 flows out through the coolant side port 1 of the first plate heat exchanger 12 and enters the port 1 of the third three-way water valve 331, flows out through the port 2 of the third three-way water valve 331 and enters the port 6 of the nine-way water valve 91, the port 6 of the nine-way water valve 91 is connected with the port 7 of the nine-way water valve 91, the coolant flows out through the port 7 of the nine-way water valve 91 and enters the inlet of the radiator 71, flows out through the outlet of the radiator 71 and enters the inlet of the electric drive water pump 24, flows out through the outlet of the electric drive water pump 24 and enters the coolant inlet of the electric drive 61, flows out through the coolant outlet of the electric drive 61 and enters the port 1 of the nine-way water valve 91, the port 1 of the nine-way water valve 91 is connected with the port 2 of the nine-way water valve 91, and the coolant flows out through the port 2 of the nine-way water valve 91 and enters the inlet of the heater water pump 21;Start the cooling water pump 22. Driven by the cooling water pump 22, the coolant enters the cooling liquid side port 2 of the second plate heat exchanger 15, flows out through the cooling liquid side port 1 of the second plate heat exchanger 15, enters the port 2 of the second three-way water valve 32, flows out through the port 1 of the second three-way water valve 32, enters the port 5 of the nine-way water valve 91, and the port 5 of the nine-way water valve 91 is connected to the port 6 of the nine-way water valve 91. The coolant flows out through the port 6 of the nine-way water valve 91 and enters the battery water pump inlet. The coolant flows out through the battery water pump outlet and enters the coolant inlet of the power battery 51. The coolant flows out through the coolant outlet of the power battery 51 and enters the port 1 of the first three-way water valve 31. The coolant flows out through the port 2 of the first three-way water valve 31 and enters the port 4 of the nine-way water valve 91. The coolant flowing out through the port 3 of the first three-way water valve 31 and the coolant flowing out through the port 6 of the nine-way water valve 91 are mixed to make the coolant inlet temperature of the power battery 51 self-detected at 25°C, and the port 1 of the second three-way water valve 32 is adjusted accordingly. If the coolant flow rate cannot be achieved by self-detection of the coolant inlet temperature of the power battery 51 at 25°C when the port three of the first three-way water valve 31 is fully closed, increase the opening of the port one of the second three-way water valve 32. Otherwise, close the opening of the port one of the second three-way water valve 32. The port four of the nine-way water valve 91 is connected to the port three of the nine-way water valve 91. The coolant flows out through the port two of the first three-way water valve 31 and enters the port four of the nine-way water valve 91. The coolant flows out through the port two of the nine-way water valve 91 and enters the coolant through the port four of the nine-way water valve 91. The coolant flows out of port 3 and enters the inlet of the cold air water pump 22. At the same time, the coolant flows out of port 3 of the second three-way water valve 32 and enters port 3 of the four-way water valve 341. It flows out of port 2 of the four-way water valve 341 and enters port 2 of the heater core 43. It flows out of port 1 of the heater core 43 and enters port 1 of the four-way water valve 341. It flows out of port 4 of the four-way water valve 341 and enters port 1 of the cold air core 42. It flows out of port 2 of the cold air core 42 and enters the inlet of the cold air water pump 22.

[0060] like Figure 7As shown, as a preferred embodiment of the present invention, in the R134a platform passenger compartment cooling, power battery 51 cooling, and electric drive 61 heat dissipation mode, the refrigerant integration module starts the electric compressor 11, and the high-temperature and high-pressure refrigerant flows out through the outlet of the electric compressor 11 and flows into the refrigerant side port 1 of the first plate heat exchanger 12, flows out through the refrigerant side port 2 of the first plate heat exchanger 12 and enters the inlet of the liquid storage tank 13, flows out through the outlet of the liquid storage tank 13 and enters the port 1 of the electronic expansion valve 14, flows out through the port 2 of the electronic expansion valve 14 and enters the refrigerant side port 1 of the second plate heat exchanger 15, and flows out through the refrigerant side port 2 of the second plate heat exchanger 15 and enters the inlet of the electric compressor 11; the warm air water pump 21 is started, and the coolant enters the first plate heat exchanger 12 under the drive of the warm air water pump 21. The coolant side port 2 of the plate heat exchanger 12 flows out through the coolant side port 1 of the first plate heat exchanger 12 and enters the port 1 of the third three-way water valve 331, flows out through the port 2 of the third three-way water valve 331 and enters the port 6 of the nine-way water valve 91, the port 6 of the nine-way water valve 91 is connected with the port 7 of the nine-way water valve 91, the coolant flows out through the port 7 of the nine-way water valve 91 and enters the inlet of the radiator 71, flows out through the outlet of the radiator 71 and enters the inlet of the electric drive water pump 24, flows out through the outlet of the electric drive water pump 24 and enters the coolant inlet of the electric drive 61, flows out through the coolant outlet of the electric drive 61 and enters the port 1 of the nine-way water valve 91, the port 1 of the nine-way water valve 91 is connected with the port 2 of the nine-way water valve 91, and the coolant flows out through the port 2 of the nine-way water valve 91 and enters the inlet of the heater water pump 21;Start the cooling water pump 22. Driven by the cooling water pump 22, the coolant enters the cooling liquid side port 2 of the second plate heat exchanger 15, flows out through the cooling liquid side port 1 of the second plate heat exchanger 15, enters the port 2 of the second three-way water valve 32, flows out through the port 1 of the second three-way water valve 32, enters the port 5 of the nine-way water valve 91, and the port 5 of the nine-way water valve 91 is connected to the port 6 of the nine-way water valve 91. The coolant flows out through the port 6 of the nine-way water valve 91 and enters the battery water pump inlet. The coolant flows out through the battery water pump outlet and enters the coolant inlet of the power battery 51. The coolant flows out through the coolant outlet of the power battery 51 and enters the port 1 of the first three-way water valve 31. The coolant flows out through the port 2 of the first three-way water valve 31 and enters the port 4 of the nine-way water valve 91. The coolant flowing out through the port 3 of the first three-way water valve 31 and the coolant flowing out through the port 6 of the nine-way water valve 91 are mixed to make the coolant inlet temperature of the power battery 51 self-detected at 25°C, and the port 1 of the second three-way water valve 32 is adjusted accordingly. If the coolant flow rate cannot be achieved by self-detection of the coolant inlet temperature of the power battery 51 at 25°C when the port three of the first three-way water valve 31 is fully closed, increase the opening of the port one of the second three-way water valve 32. Otherwise, close the opening of the port one of the second three-way water valve 32. The port four of the nine-way water valve 91 is connected to the port three of the nine-way water valve 91. The coolant flows out through the port two of the first three-way water valve 31 and enters the port four of the nine-way water valve 91. The coolant flows out through the port two of the nine-way water valve 91 and enters the coolant through the port four of the nine-way water valve 91. The coolant flows out of port 3 and enters the inlet of the cold air water pump 22. At the same time, the coolant flows out of port 3 of the second three-way water valve 32 and enters port 3 of the five-way water valve 351. It flows out of port 2 of the five-way water valve 351 and enters port 2 of the heater core 43. It flows out of port 1 of the heater core 43 and enters port 1 of the five-way water valve 351. It flows out of port 4 of the five-way water valve 351 and enters port 1 of the cold air core 42. It flows out of port 2 of the cold air core 42 and enters the inlet of the cold air water pump 22.

[0061] like Figure 8As shown, as a preferred embodiment of the present invention, in the R134a platform passenger compartment cooling, power battery 51 cooling, and electric drive 61 heat dissipation mode, the refrigerant integration module starts the electric compressor 11, and the high-temperature and high-pressure refrigerant flows out through the outlet of the electric compressor 11 and flows into the refrigerant side port 1 of the first plate heat exchanger 12, flows out through the refrigerant side port 2 of the first plate heat exchanger 12 and enters the inlet of the liquid storage tank 13, flows out through the outlet of the liquid storage tank 13 and enters the port 1 of the electronic expansion valve 14, flows out through the port 2 of the electronic expansion valve 14 and enters the refrigerant side port 1 of the second plate heat exchanger 15, and flows out through the refrigerant side port 2 of the second plate heat exchanger 15 and enters the inlet of the electric compressor 11; the warm air water pump 21 is started, and the coolant enters the first plate heat exchanger 12 under the drive of the warm air water pump 21. The coolant side port 2 of the first plate heat exchanger 12 flows out through the coolant side port 1 of the first plate heat exchanger 12 and enters the port 5 of the six-way water valve 361, flows out through the port 1 of the six-way water valve 361 and enters the port 6 of the nine-way water valve 91, the port 6 of the nine-way water valve 91 is connected with the port 7 of the nine-way water valve 91, the coolant flows out through the port 7 of the nine-way water valve 91 and enters the inlet of the radiator 71, flows out through the outlet of the radiator 71 and enters the inlet of the electric drive water pump 24, flows out through the outlet of the electric drive water pump 24 and enters the coolant inlet of the electric drive 61, flows out through the coolant outlet of the electric drive 61 and enters the port 1 of the nine-way water valve 91, the port 1 of the nine-way water valve 91 is connected with the port 2 of the nine-way water valve 91, and the coolant flows out through the port 2 of the nine-way water valve 91 and enters the inlet of the heater water pump 21;Start the cooling water pump 22. Driven by the cooling water pump 22, the coolant enters the cooling liquid side port 2 of the second plate heat exchanger 15, flows out through the cooling liquid side port 1 of the second plate heat exchanger 15, enters the port 2 of the second three-way water valve 32, flows out through the port 1 of the second three-way water valve 32, enters the port 5 of the nine-way water valve 91, and the port 5 of the nine-way water valve 91 is connected to the port 6 of the nine-way water valve 91. The coolant flows out through the port 6 of the nine-way water valve 91 and enters the battery water pump inlet. The coolant flows out through the battery water pump outlet and enters the coolant inlet of the power battery 51. The coolant flows out through the coolant outlet of the power battery 51 and enters the port 1 of the first three-way water valve 31. The coolant flows out through the port 2 of the first three-way water valve 31 and enters the port 4 of the nine-way water valve 91. The coolant flowing out through the port 3 of the first three-way water valve 31 and the coolant flowing out through the port 6 of the nine-way water valve 91 are mixed to make the coolant inlet temperature of the power battery 51 self-detected at 25°C, and the port 1 of the second three-way water valve 32 is adjusted accordingly. If the coolant flow rate cannot be achieved by self-detection of the coolant inlet temperature of the power battery 51 at 25°C when the port three of the first three-way water valve 31 is fully closed, increase the opening of the port one of the second three-way water valve 32. Otherwise, close the opening of the port one of the second three-way water valve 32. The port four of the nine-way water valve 91 is connected to the port three of the nine-way water valve 91. The coolant flows out through the port two of the first three-way water valve 31 and enters the port four of the nine-way water valve 91. The coolant flows out through the port two of the nine-way water valve 91 and enters the coolant through the port four of the nine-way water valve 91. The coolant flows out of port 3 and enters the inlet of the cold air water pump 22. At the same time, the coolant flows out of port 3 of the second three-way water valve 32 and enters port 3 of the six-way water valve 361. It flows out of port 2 of the six-way water valve 361 and enters port 2 of the heater core 43. It flows out of port 1 of the heater core 43 and enters port 6 of the six-way water valve 361. It flows out of port 4 of the six-way water valve 361 and enters port 1 of the cold air core 42. It flows out of port 2 of the cold air core 42 and enters the inlet of the cold air water pump 22.

[0062] like Figure 9As shown, as a preferred embodiment of the present invention, in the R290 platform passenger cabin gentle cooling, power battery 51 cooling, and electric drive 61 heat dissipation mode, the refrigerant integrated module starts the electric compressor 11, and the high-temperature and high-pressure refrigerant flows out through the outlet of the electric compressor 11 and flows into the refrigerant side port 1 of the first plate heat exchanger 12, flows out through the refrigerant side port 2 of the first plate heat exchanger 12 and enters the inlet of the liquid storage tank 13, flows out through the outlet of the liquid storage tank 13 and enters the port 1 of the electronic expansion valve 14, flows out through the port 2 of the electronic expansion valve 14 and enters the refrigerant side port 1 of the second plate heat exchanger 15, and flows out through the refrigerant side port 2 of the second plate heat exchanger 15 and enters the inlet of the electric compressor 11; the warm air water pump 21 is started, and the coolant enters the first plate heat exchanger 12 under the drive of the warm air water pump 21. The coolant side port 2 of the plate heat exchanger 12 flows out through the coolant side port 1 of the first plate heat exchanger 12 and enters the port 1 of the third three-way water valve 331, flows out through the port 2 of the third three-way water valve 331 and enters the port 6 of the nine-way water valve 91, the port 6 of the nine-way water valve 91 is connected with the port 7 of the nine-way water valve 91, the coolant flows out through the port 7 of the nine-way water valve 91 and enters the inlet of the radiator 71, flows out through the outlet of the radiator 71 and enters the inlet of the electric drive water pump 24, flows out through the outlet of the electric drive water pump 24 and enters the coolant inlet of the electric drive 61, flows out through the coolant outlet of the electric drive 61 and enters the port 1 of the nine-way water valve 91, the port 1 of the nine-way water valve 91 is connected with the port 2 of the nine-way water valve 91, and the coolant flows out through the port 2 of the nine-way water valve 91 and enters the inlet of the heater water pump 21;Start the cold air water pump 22. Driven by the cold air water pump 22, the coolant enters the coolant side port 2 of the second plate heat exchanger 15, flows out through the coolant side port 1 of the second plate heat exchanger 15, enters the port 2 of the second three-way water valve 32, flows out through the port 1 of the second three-way water valve 32, enters the port 5 of the nine-way water valve 91, and the port 5 of the nine-way water valve 91 is connected with the port 6 of the nine-way water valve 91. The coolant flows out through the port 6 of the nine-way water valve 91 and enters the battery water pump inlet, flows out through the battery water pump outlet and enters the coolant inlet of the power battery 51, flows out through the coolant outlet of the power battery 51 and enters the port 1 of the first three-way water valve 31, flows out through the port 2 of the first three-way water valve 31 and enters the port 4 of the nine-way water valve 91, and the coolant flowing out through the port 3 of the first three-way water valve 31 is mixed with the coolant flowing out through the port 6 of the nine-way water valve 91 to enable the power battery 51 to self-detect the coolant inlet. The water temperature is 25°C, and the coolant flow rate at port 1 of the second three-way water valve 32 is adjusted accordingly. If the power battery 51 still cannot self-detect the coolant inlet water temperature at 25°C when port 3 of the first three-way water valve 31 is fully closed, the opening of port 1 of the second three-way water valve 32 is increased. Otherwise, the opening of port 1 of the second three-way water valve 32 is decreased. Port 4 of the nine-way water valve 91 is connected to port 3 of the nine-way water valve 91. Coolant flows out through port 2 of the first three-way water valve 31 and into port 4 of the nine-way water valve 91. Coolant flows out through port 3 of the nine-way water valve 91 and into the inlet of the cold air water pump 22. Simultaneously, coolant flows out through port 3 of the second three-way water valve 32 and into port 3 of the fourth three-way water valve 332. It flows out through port 2 of the fourth three-way water valve 332 and into port 1 of the cold air core 42. It then flows out through port 2 of the cold air core 42 and into the inlet of the cold air water pump 22.

[0063] like Figure 10As shown, as a preferred embodiment of the present invention, in the R290 platform passenger cabin gentle cooling, power battery 51 cooling, and electric drive 61 heat dissipation mode, the refrigerant integrated module starts the electric compressor 11, and the high-temperature and high-pressure refrigerant flows out through the outlet of the electric compressor 11 and flows into the refrigerant side port 1 of the first plate heat exchanger 12, flows out through the refrigerant side port 2 of the first plate heat exchanger 12 and enters the inlet of the liquid storage tank 13, flows out through the outlet of the liquid storage tank 13 and enters the port 1 of the electronic expansion valve 14, flows out through the port 2 of the electronic expansion valve 14 and enters the refrigerant side port 1 of the second plate heat exchanger 15, and flows out through the refrigerant side port 2 of the second plate heat exchanger 15 and enters the inlet of the electric compressor 11; the warm air water pump 21 is started, and the coolant enters the first plate heat exchanger 12 under the drive of the warm air water pump 21. The coolant side port 2 of the plate heat exchanger 12 flows out through the coolant side port 1 of the first plate heat exchanger 12 and enters the port 1 of the third three-way water valve 331, flows out through the port 2 of the third three-way water valve 331 and enters the port 6 of the nine-way water valve 91, the port 6 of the nine-way water valve 91 is connected with the port 7 of the nine-way water valve 91, the coolant flows out through the port 7 of the nine-way water valve 91 and enters the inlet of the radiator 71, flows out through the outlet of the radiator 71 and enters the inlet of the electric drive water pump 24, flows out through the outlet of the electric drive water pump 24 and enters the coolant inlet of the electric drive 61, flows out through the coolant outlet of the electric drive 61 and enters the port 1 of the nine-way water valve 91, the port 1 of the nine-way water valve 91 is connected with the port 2 of the nine-way water valve 91, and the coolant flows out through the port 2 of the nine-way water valve 91 and enters the inlet of the heater water pump 21;Start the cold air water pump 22. Driven by the cold air water pump 22, the coolant enters the coolant side port 2 of the second plate heat exchanger 15, flows out through the coolant side port 1 of the second plate heat exchanger 15, enters the port 2 of the second three-way water valve 32, flows out through the port 1 of the second three-way water valve 32, enters the port 5 of the nine-way water valve 91, and the port 5 of the nine-way water valve 91 is connected with the port 6 of the nine-way water valve 91. The coolant flows out through the port 6 of the nine-way water valve 91 and enters the battery water pump inlet, flows out through the battery water pump outlet and enters the coolant inlet of the power battery 51, flows out through the coolant outlet of the power battery 51 and enters the port 1 of the first three-way water valve 31, flows out through the port 2 of the first three-way water valve 31 and enters the port 4 of the nine-way water valve 91, and the coolant flowing out through the port 3 of the first three-way water valve 31 is mixed with the coolant flowing out through the port 6 of the nine-way water valve 91 to enable the power battery 51 to self-detect and cool. The coolant inlet temperature is 25°C, and the coolant flow rate at port 1 of the second three-way water valve 32 is adjusted accordingly. If the power battery 51 still cannot self-detect the coolant inlet water temperature at 25°C when port 3 of the first three-way water valve 31 is fully closed, the opening of port 1 of the second three-way water valve 32 is increased. Otherwise, the opening of port 1 of the second three-way water valve 32 is reduced. Port 4 of the nine-way water valve 91 is connected to port 3 of the nine-way water valve 91. The coolant flows out through port 2 of the first three-way water valve 31 and into port 4 of the nine-way water valve 91. The coolant flows out through port 3 of the nine-way water valve 91 and into the inlet of the cold air water pump 22. At the same time, the coolant flows out through port 3 of the second three-way water valve 32 and into port 3 of the four-way water valve 341. The coolant flows out through port 4 of the four-way water valve 341 and into port 1 of the cold air core 42. The coolant flows out through port 2 of the cold air core 42 and into the inlet of the cold air water pump 22.

[0064] like Figure 11As shown, as a preferred embodiment of the present invention, in the R290 platform passenger cabin gentle cooling, power battery 51 cooling, and electric drive 61 heat dissipation mode, the refrigerant integrated module starts the electric compressor 11, and the high-temperature and high-pressure refrigerant flows out through the outlet of the electric compressor 11 and flows into the refrigerant side port 1 of the first plate heat exchanger 12, flows out through the refrigerant side port 2 of the first plate heat exchanger 12 and enters the inlet of the liquid storage tank 13, flows out through the outlet of the liquid storage tank 13 and enters the port 1 of the electronic expansion valve 14, flows out through the port 2 of the electronic expansion valve 14 and enters the refrigerant side port 1 of the second plate heat exchanger 15, and flows out through the refrigerant side port 2 of the second plate heat exchanger 15 and enters the inlet of the electric compressor 11; the warm air water pump 21 is started, and the coolant enters the first plate heat exchanger 12 under the drive of the warm air water pump 21. The coolant side port 2 of the plate heat exchanger 12 flows out through the coolant side port 1 of the first plate heat exchanger 12 and enters the port 1 of the third three-way water valve 331, flows out through the port 2 of the third three-way water valve 331 and enters the port 6 of the nine-way water valve 91, the port 6 of the nine-way water valve 91 is connected with the port 7 of the nine-way water valve 91, the coolant flows out through the port 7 of the nine-way water valve 91 and enters the inlet of the radiator 71, flows out through the outlet of the radiator 71 and enters the inlet of the electric drive water pump 24, flows out through the outlet of the electric drive water pump 24 and enters the coolant inlet of the electric drive 61, flows out through the coolant outlet of the electric drive 61 and enters the port 1 of the nine-way water valve 91, the port 1 of the nine-way water valve 91 is connected with the port 2 of the nine-way water valve 91, and the coolant flows out through the port 2 of the nine-way water valve 91 and enters the inlet of the heater water pump 21;Start the cold air water pump 22. Driven by the cold air water pump 22, the coolant enters the coolant side port 2 of the second plate heat exchanger 15, flows out through the coolant side port 1 of the second plate heat exchanger 15, enters the port 2 of the second three-way water valve 32, flows out through the port 1 of the second three-way water valve 32, enters the port 5 of the nine-way water valve 91, and the port 5 of the nine-way water valve 91 is connected with the port 6 of the nine-way water valve 91. The coolant flows out through the port 6 of the nine-way water valve 91 and enters the battery water pump inlet, flows out through the battery water pump outlet and enters the coolant inlet of the power battery 51, flows out through the coolant outlet of the power battery 51 and enters the port 1 of the first three-way water valve 31, flows out through the port 2 of the first three-way water valve 31 and enters the port 4 of the nine-way water valve 91, and the coolant flowing out through the port 3 of the first three-way water valve 31 is mixed with the coolant flowing out through the port 6 of the nine-way water valve 91 to enable the power battery 51 to self-detect and cool. The coolant inlet temperature is 25°C, and the coolant flow rate at port 1 of the second three-way water valve 32 is adjusted accordingly. If the power battery 51 still cannot achieve self-detection of the coolant inlet water temperature at 25°C when port 3 of the first three-way water valve 31 is fully closed, the opening of port 1 of the second three-way water valve 32 is increased. Otherwise, the opening of port 1 of the second three-way water valve 32 is reduced. Port 4 of the nine-way water valve 91 is connected to port 3 of the nine-way water valve 91. The coolant flows out through port 2 of the first three-way water valve 31 and into port 4 of the nine-way water valve 91. The coolant flows out through port 3 of the nine-way water valve 91 and into the inlet of the cold air water pump 22. At the same time, the coolant flows out through port 3 of the second three-way water valve 32 and into port 3 of the five-way water valve 351. The coolant flows out through port 4 of the five-way water valve 351 and into port 1 of the cold air core 42. The coolant flows out through port 2 of the cold air core 42 and into the inlet of the cold air water pump 22.

[0065] like Figure 12As shown, as a preferred embodiment of the present invention, in the R290 platform passenger cabin gentle cooling, power battery 51 cooling, and electric drive 61 heat dissipation mode, the refrigerant integration module starts the electric compressor 11, and the high-temperature and high-pressure refrigerant flows out through the outlet of the electric compressor 11 and flows into the refrigerant side port 1 of the first plate heat exchanger 12, flows out through the refrigerant side port 2 of the first plate heat exchanger 12 and enters the inlet of the liquid storage tank 13, flows out through the outlet of the liquid storage tank 13 and enters the port 1 of the electronic expansion valve 14, flows out through the port 2 of the electronic expansion valve 14 and enters the refrigerant side port 1 of the second plate heat exchanger 15, and flows out through the refrigerant side port 2 of the second plate heat exchanger 15 and enters the inlet of the electric compressor 11; the warm air water pump 21 is started, and the coolant enters the coolant under the drive of the warm air water pump 21 The coolant side port 2 of the first plate heat exchanger 12 flows out through the coolant side port 1 of the first plate heat exchanger 12 and enters the port 5 of the six-way water valve 361, flows out through the port 1 of the six-way water valve 361 and enters the port 6 of the nine-way water valve 91, the port 6 of the nine-way water valve 91 is connected with the port 7 of the nine-way water valve 91, the coolant flows out through the port 7 of the nine-way water valve 91 and enters the inlet of the radiator 71, flows out through the outlet of the radiator 71 and enters the inlet of the electric drive water pump 24, flows out through the outlet of the electric drive water pump 24 and enters the coolant inlet of the electric drive 61, flows out through the coolant outlet of the electric drive 61 and enters the port 1 of the nine-way water valve 91, the port 1 of the nine-way water valve 91 is connected with the port 2 of the nine-way water valve 91, and the coolant flows out through the port 2 of the nine-way water valve 91 and enters the inlet of the heater water pump 21;Start the cold air water pump 22. Driven by the cold air water pump 22, the coolant enters the coolant side port 2 of the second plate heat exchanger 15, flows out through the coolant side port 1 of the second plate heat exchanger 15, enters the port 2 of the second three-way water valve 32, flows out through the port 1 of the second three-way water valve 32, enters the port 5 of the nine-way water valve 91, and the port 5 of the nine-way water valve 91 is connected with the port 6 of the nine-way water valve 91. The coolant flows out through the port 6 of the nine-way water valve 91 and enters the battery water pump inlet, flows out through the battery water pump outlet and enters the coolant inlet of the power battery 51, flows out through the coolant outlet of the power battery 51 and enters the port 1 of the first three-way water valve 31, flows out through the port 2 of the first three-way water valve 31 and enters the port 4 of the nine-way water valve 91, and the coolant flowing out through the port 3 of the first three-way water valve 31 is mixed with the coolant flowing out through the port 6 of the nine-way water valve 91 to enable the power battery 51 to self-detect and cool. The coolant inlet temperature is 25°C, and the coolant flow rate at port 1 of the second three-way water valve 32 is adjusted accordingly. If the power battery 51 still cannot achieve self-detection of the coolant inlet water temperature at 25°C when port 3 of the first three-way water valve 31 is fully closed, the opening of port 1 of the second three-way water valve 32 is increased. Otherwise, the opening of port 1 of the second three-way water valve 32 is reduced. Port 4 of the nine-way water valve 91 is connected to port 3 of the nine-way water valve 91. The coolant flows out through port 2 of the first three-way water valve 31 and into port 4 of the nine-way water valve 91. The coolant flows out through port 3 of the nine-way water valve 91 and into the inlet of the cold air water pump 22. At the same time, the coolant flows out through port 3 of the second three-way water valve 32 and into port 3 of the six-way water valve 361. The coolant flows out through port 4 of the six-way water valve 361 and into port 1 of the cold air core 42. The coolant flows out through port 2 of the cold air core 42 and into the inlet of the cold air water pump 22.

[0066] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A collaborative thermal management system for electric vehicles based on a cross-refrigerant compatible architecture, characterized in that: The system comprises: Refrigerant integration module, water side integration module, passenger compartment thermal management module, power battery thermal management module, electric drive thermal management module, front-end cooling module and expansion kettle module, including: The refrigerant integrated module comprises an electric compressor (11), a first plate heat exchanger (12), a liquid storage tank (13), an electronic expansion valve (14) and a second plate heat exchanger (15), wherein the first plate heat exchanger (12) and the second plate heat exchanger (15) both have a refrigerant side and a coolant side, the outlet of the electric compressor (11) is connected to the refrigerant side inlet of the first plate heat exchanger (12), the refrigerant side outlet of the first plate heat exchanger (12) is connected to the refrigerant side inlet of the liquid storage tank (13), the electronic expansion valve (14) and the second plate heat exchanger (15) in sequence, and the refrigerant side outlet of the second plate heat exchanger (15) is connected to the inlet of the electric compressor (11); The water-side integrated module comprises a nine-way water valve (91), a first three-way water valve (31), a second three-way water valve (32) and a warm air water pump (21), wherein the nine-way water valve (91) is respectively connected to the front-end cooling module, the electric drive thermal management module, the power battery thermal management module, the passenger compartment thermal management module and the expansion kettle module through a plurality of ports; The passenger compartment thermal management module includes a passenger compartment HVAC assembly and a cross-refrigerant compatibility module unit, the passenger compartment HVAC assembly includes a blower (41), a warm air core (43), and a cold air core (42), the cross-refrigerant compatibility module unit is used to control the series switching of the cold air core (42) and the warm air core (43), the cross-refrigerant compatibility module unit includes a third three-way water valve (331), a fourth three-way water valve (332), and a fifth three-way water valve (333), wherein the blower (41) is placed at the air inlet of the warm air core (43) and the cold air core (42), the port one of the warm air core (43) is connected to the pipe intersection point I, the pipe intersection point I is connected to the port three of the third three-way water valve (331), and the pipe intersection point I is connected to the port one of the fourth three-way water valve (332). , port 2 of the third three-way water valve (331) is connected to the pipeline intersection H, port 1 of the third three-way water valve (331) is connected to port 1 of the first plate heat exchanger (12), port 2 of the fourth three-way water valve (332) is connected to port 1 of the cold air core (42), port 3 of the fourth three-way water valve (332) is connected to the pipeline intersection J, the pipeline intersection H is connected to port 2 of the fifth three-way water valve (333), port 1 of the fifth three-way water valve (333) is connected to the pipeline intersection J, port 3 of the fifth three-way water valve (333) is connected to port 2 of the warm air core (43), the pipeline intersection J is connected to port 3 of the second three-way water valve (32), and port 2 of the second three-way water valve (32) is connected to port 1 of the second plate heat exchanger (15); The power battery thermal management module and the electric drive thermal management module are respectively connected to the coolant circuit via the nine-way water valve (91), and the coolant circulation is driven by a water pump; The system is configured to be compatible with both R134a and R290 refrigerant platforms, and adapts to the cooling needs of different refrigerants by adjusting the flow connection method of the cross-refrigerant compatibility module unit.

2. The system according to claim 1, wherein: In the water-side integrated module, the port connection relationship of the nine-way water valve (91) is as follows: Port six is connected to port three of the first three-way water valve (31) through a pipeline intersection point A; Port 4 is connected to port 2 of the first three-way water valve (31); Port 8 is connected to the cross-refrigerant compatibility module unit through a pipeline intersection H; Port 2 is connected to the inlet of the warm air water pump (21); Port five is connected to port one of the second three-way water valve (32); Port seven is connected to the radiator (71) of the front-end cooling module; Port 1 is connected to the water outlet of the electric drive (61) of the electric drive thermal management module.

3. The system according to claim 1, wherein: The cross-refrigerant compatibility module unit includes one of the following three integration solutions: Integration solution 1: using a four-way water valve (341), a third three-way water valve (331) and a two-way ball valve (321) to replace the original fourth three-way water valve (332) and the fifth three-way water valve (333); Integration solution 2: using a five-way water valve (351) and a third three-way water valve (331) to replace the original fourth three-way water valve (332) and the fifth three-way water valve (333); Integration solution three: using a six-way water valve (361) to replace the original fourth three-way water valve (332) and the fifth three-way water valve (333).

4. The system according to claim 3, characterized in that In the integration solution 1: Port 1 of the four-way water valve (341) is connected to port 1 of the warm air core (43), port 2 is connected to port 1 of the cold air core (42), port 3 is connected to port 3 of the second three-way water valve (32), and port 4 is connected to port 2 of the warm air core (43) via a pipe intersection point I; Port 1 of the two-way ball valve (321) is connected to the pipeline intersection point H, and port 2 is connected to the pipeline intersection point J.

5. The system according to claim 1, wherein: When operating under the R134a refrigerant platform, the cross-refrigerant compatibility module unit is controlled to connect the cold air core (42) and the warm air core (43) in series to improve the cooling capacity; when operating under the R290 refrigerant platform, the cold air core (42) is selected to work alone or in series with the warm air core (43) according to the cooling demand.

6. The system according to claim 1, wherein: The front-end cooling module includes a radiator (71), one end of the radiator (71) is connected to port seven of the nine-way water valve (91), and the other end is connected to the coolant circuit of the electric drive thermal management module through a pipeline intersection point D.

7. The system according to claim 1, wherein: The cross-refrigerant compatibility module unit is integrated into the HVAC assembly.

8. The system according to claim 1, wherein: The cross-refrigerant compatibility module unit is mounted on the outside of the HVAC assembly housing.

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