New energy automobile waste heat power generation and heat management cooperative utilization system and control method

Abstract

The invention is suitable for the technical field of heat management of new energy hybrid electric vehicles, and provides a new energy vehicle waste heat power generation and heat management cooperative utilization system and a control method, the system comprises an organic Rankine cycle waste heat power generation loop, an organic Rankine cycle waste heat power generation loop, a heat management loop and an organic Rankine cycle waste heat power generation loop, a heat pump air-conditioning loop; a thermal management circulation loop group; the evaporation end of the organic Rankine cycle waste heat power generation loop is connected into the engine / range extender cooling loop and the electric drive system cooling loop through a heat exchanger. And the medium-temperature loop part of the organic Rankine cycle waste heat power generation loop is configured to perform heat integration interaction with the heat pump air conditioner loop through the waste heat recovery interface unit, or is arranged independent of the heat pump air conditioner loop. According to the system, an eight-way valve is adopted as a flow distribution hub, multi-grade waste heat is fed back to a battery through the ORC technology, efficient utilization of energy is achieved, the framework is simplified, and meanwhile the endurance mileage and profound hypothermia adaptability of the whole vehicle are remarkably improved.

Description

Technical Field

[0001] This invention belongs to the field of thermal management technology for new energy hybrid vehicles, and particularly relates to a system and control method for the coordinated utilization of waste heat power generation and thermal management in new energy vehicles. Background Technology

[0002] New energy hybrid vehicles have become an important development direction for the automotive industry due to their excellent range performance and economy. However, the thermal management systems of existing new energy hybrid vehicles generally face technical bottlenecks such as low energy utilization and poor system integration and interaction. On the one hand, in summer or under conditions where heating is not required, the large amount of multi-grade heat generated by the engine / range extender and electric drive system is usually directly dissipated into the atmosphere through the radiator, lacking an efficient thermoelectric conversion path and failing to convert it into electric energy feedback batteries through technologies such as the Organic Rankine Cycle (ORC), resulting in huge energy waste. On the other hand, in the thermal management architecture of existing new energy hybrid vehicles, waste heat utilization, heat pump air conditioning, and ORC systems operate in an isolated state, lacking deep integration design and heat interaction. This lack of coordinated architectural layout leads to high system hardware redundancy and a broken energy recycling chain, resulting in low system energy utilization.

[0003] Therefore, there is an urgent need to propose a system and control method for the coordinated utilization of waste heat power generation and thermal management in new energy vehicles. By deeply integrating and interacting with waste heat utilization, heat pump air conditioning and ORC system, and combining multi-way valve flow path switching technology, the system can realize the recovery of waste heat from the vehicle to generate electricity under all temperature range conditions to improve the driving range, while expanding the energy interaction between various thermal management subsystems, reducing system hardware redundancy, and improving the energy utilization efficiency of the whole vehicle. Summary of the Invention

[0004] The purpose of this invention is to provide a system and control method for the coordinated utilization of waste heat power generation and thermal management in new energy vehicles, aiming to solve the problems mentioned in the background art.

[0005] The present invention is implemented as follows: a system for the coordinated utilization of waste heat from new energy vehicles for power generation and thermal management includes: The organic Rankine cycle waste heat power generation circuit includes a high-temperature circuit section and a medium-temperature circuit section, which are used to recover waste heat of different grades and convert it into electrical energy. The heat pump air conditioning circuit is used to cool or heat the passenger compartment and the power battery pack, and has the function of waste heat recovery. The thermal management cycle circuit group includes the engine / range extender cooling circuit, the electric drive system cooling circuit, the passenger compartment heating circuit, and the battery cooling / heating circuit; The evaporator end of the organic Rankine cycle waste heat power generation circuit is connected to the engine / range extender cooling circuit and the electric drive system cooling circuit respectively through a heat exchanger. The system also includes a waste heat recovery interface unit. The medium-temperature circuit portion of the organic Rankine cycle waste heat power generation circuit is configured to thermally integrate with the heat pump air conditioning circuit through the waste heat recovery interface unit, or to be set up independently of the heat pump air conditioning circuit.

[0006] A further technical solution is that the waste heat recovery interface unit has two configuration options: Option 1: The waste heat recovery interface unit is a medium-temperature evaporator. The heat pump air conditioning circuit and the organic Rankine cycle waste heat power generation circuit are thermally integrated and interact through the medium-temperature evaporator. The medium-temperature evaporator is configured to serve as the waste heat recovery end of the heat pump air conditioning circuit in different modes, or as the evaporation heat absorption end of the organic Rankine cycle waste heat power generation circuit, or as the low-temperature heat absorption heat source of the heat pump air conditioning circuit at deep low temperatures. Option 2: The waste heat recovery interface unit is a waste heat recovery evaporator, which is configured to be connected to the heat pump air conditioning circuit to provide a heat source for the heat pump air conditioning circuit using the system's waste heat.

[0007] A further technical solution is that the heat pump air conditioning circuit includes a compressor, a first four-way valve, an outdoor heat exchanger, an indoor evaporator, an indoor condenser, a gas-liquid separator, a battery cooler, a low-temperature condenser, and a valve assembly consisting of multiple three-way valves and an electronic expansion valve; The four ports of the first four-way valve are respectively connected to the compressor outlet, the outdoor heat exchanger, the low-temperature condenser, and the return gas pipeline. The system controls the flow path of the refrigerant between the outdoor heat exchanger, the indoor evaporator, the indoor condenser, the low-temperature condenser, and the battery cooler by adjusting the on / off state of the valve assembly, so as to control the cooling, heating and the integrated interaction of different heat sources.

[0008] Furthermore, the thermal management loop group is integrated and controlled by a flow path switching valve group, which includes an eight-way valve. The engine / range extender cooling circuit includes the engine / range extender and a high-temperature radiator; the electric drive system cooling circuit includes the drive motor and a medium-temperature radiator; the passenger compartment heating circuit includes a heater core; and the battery cooling / heating circuit includes the power battery pack and a battery cooler. The eight-way valve, as a flow distribution hub, is configured to control the fluid connection and diversion between the above-mentioned circuits: in normal heat dissipation mode, it controls the independent heat dissipation of each circuit; in waste heat recovery mode, it controls the high-temperature coolant of the engine / range extender and electric drive system to enter the organic Rankine cycle waste heat power generation circuit after they merge, and distributes the heat to the passenger compartment heating circuit or the battery cooling / heating circuit.

[0009] Another objective of this invention is to provide a control method for a new energy vehicle waste heat power generation and thermal management synergistic utilization system, based on the aforementioned system, comprising the following steps: Step 1: Acquire vehicle thermal management requirements and environmental status signals; Step 2: Determine the system operation mode based on the signal. The operation mode includes at least the following: summer cooling and waste heat recovery power generation mode, spring and autumn waste heat recovery power generation mode, winter low temperature waste heat recovery mode, and deep low temperature waste heat recovery mode. Step 3: Based on the determined operating mode, the controller adjusts the on / off state or opening degree of the compressor, pump, expander and various valve components in the system to switch the flow path and flow rate of refrigerant, coolant and organic Rankine cycle working fluid, thereby ensuring that the power battery, electric drive system, engine / range extender and passenger compartment are all within the target temperature range under different operating conditions, and maximizing waste heat power generation efficiency.

[0010] The present invention provides a system and control method for the coordinated utilization of waste heat power generation and thermal management in new energy vehicles, the beneficial effects of which are as follows: (1) High energy conversion efficiency (power generation function): The organic Rankine cycle is creatively introduced, breaking the limitation of traditional thermal management systems that can only use waste heat for heating. It can convert a large amount of multi-grade waste heat generated by the engine / range extender and electric drive system into electric energy feedback battery, which significantly improves the energy utilization efficiency and driving range of the whole vehicle.

[0011] (2) High integration and flexible flow path: Through the cooperation of eight-way valve and multiple three-way valves, the heat between the engine, electric drive, battery and crew compartment is flexibly managed, which not only realizes the efficient use of multiple heat sources, but also simplifies the pipeline connection and reduces the system flow resistance and assembly difficulty.

[0012] (3) Full-temperature-range waste heat utilization: The system achieves efficient utilization of waste heat covering the entire temperature range from high-temperature cooling in summer to deep-low-temperature heating in winter, based on different seasons and load requirements, between waste heat power generation, waste heat heating of the passenger compartment / battery, and waste heat supply to the heat pump.

[0013] (4) Strong adaptability to deep low temperature: For deep low temperature working conditions, the system can convert the medium temperature evaporator into a low heat source of the heat pump system by switching the flow path, and combined with the stall heat generation technology of the drive motor, it effectively solves the problem of limited heating of conventional air source heat pumps under extremely cold conditions and expands the low temperature working range of the system. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a new energy vehicle waste heat power generation and thermal management synergistic utilization system provided in Embodiment 1; Figure 2This is a schematic diagram of a new energy vehicle waste heat power generation and thermal management synergistic utilization system provided in Embodiment 2; Figure 3 This is a schematic diagram illustrating the working principle of Example 1 under the summer cooling and waste heat recovery power generation mode; Figure 4 This is a schematic diagram illustrating the working principle of Example 2 under the summer cooling and waste heat recovery power generation mode; Figure 5 This is a schematic diagram illustrating the working principle of Example 1 under the waste heat recovery power generation mode in spring and autumn. Figure 6 This is a schematic diagram illustrating the working principle of Example 2 under the waste heat recovery power generation mode in spring and autumn. Figure 7 This is a schematic diagram illustrating the working principle of Example 1 under the low-temperature waste heat recovery mode in winter; Figure 8 This is a schematic diagram illustrating the working principle of Example 2 under the low-temperature waste heat recovery mode in winter; Figure 9 This is a schematic diagram illustrating another working principle of Example 1 under the low-temperature waste heat recovery mode in winter; Figure 10 This is a schematic diagram illustrating another working principle of Example 2 under the low-temperature waste heat recovery mode in winter; Figure 11 This is a schematic diagram illustrating another working principle of Example 1 under the low-temperature waste heat recovery mode in winter; Figure 12 This is a schematic diagram illustrating another working principle of Example 2 under the low-temperature waste heat recovery mode in winter; Figure 13 This is a schematic diagram illustrating the working principle of Example 1 under the cryogenic waste heat recovery mode; Figure 14 This is a schematic diagram illustrating the working principle of Example 2 under the cryogenic waste heat recovery mode; Figure 15 This is a schematic diagram illustrating another working principle of Example 1 under the cryogenic waste heat recovery mode; Figure 16 This is a schematic diagram illustrating another working principle of Example 2 under the cryogenic waste heat recovery mode; Figure 17 This is a schematic diagram illustrating the working principle of Example 1 under independent system heat dissipation conditions; Figure 18 This is a schematic diagram illustrating the working principle of Embodiment 2 under independent system heat dissipation conditions.

[0015] Figure 19 This is a schematic diagram of the connection of the eight-way valve under all operating modes.

[0016] In the attached diagram: Compressor; 110 - First four-way valve (for each four-way valve, I represents its first port; II represents its second port; III represents its third port; IV represents its fourth port); 120 - Outdoor heat exchanger; 130 - First three-way valve (for each three-way valve, a represents its first port; b represents its second port; c represents its third port); 140 - Second three-way valve; 151 - First electronic expansion valve; 152 - Second electronic expansion valve; 160 - Third three-way valve; 171 - Indoor evaporator; 172 - Indoor condenser; 173 - Battery cooler; 180 - Fourth three-way valve; 190-Fifth three-way valve; 200-Cryogenic condenser; 210-Sixth three-way valve; 220-Gas-liquid separator; 230-First electric water pump; 241-Drive motor; 242-Motor controller; 243-DC converter; 244-Inverter; 250-Seventh three-way valve; 260-Eighth three-way valve; 270-Ninth three-way valve; 280-Eight-way valve (①-⑧ represent its first to eighth ports respectively); 290-Thirteenth three-way valve; 300-Eleventh three-way valve; 310-Electric coolant reservoir; 320-Second electric water pump; 33 0-Twelfth three-way valve; 340-Thirteenth three-way valve; 350-Second four-way valve; 360-Battery pack liquid cooling plate; 370-Power battery pack; 380-Third electronic water pump; 390-Engine / range extender; 400-Thermostat (i indicates the first port, ii indicates the second port, iii indicates the third port); 410-Fourteenth three-way valve; 420-High-temperature radiator; 430-Engine / range extender coolant reservoir; 440-Fifteenth three-way valve; 450-Heater core; 460-High-temperature working fluid pump; 470-High-temperature evaporator; 480-High-temperature expander ; 490-High-temperature condenser; 500-Medium-temperature working fluid pump; 510-Sixteenth three-way valve; 520-Regenerator; 530-First shut-off valve; 540-Second shut-off valve; 550-Medium-temperature evaporator; 560-Medium-temperature expander; 570-Medium-temperature condenser; 580-Seventeenth three-way valve; 590-Fourth electronic water pump; 600-Eighteenth three-way valve; 610-Medium-temperature radiator; 620-Third shut-off valve; 630-Third electronic expansion valve; 640-Waste heat recovery evaporator; 650-Nineteenth three-way valve; 660-Radiator module; 670-Crew compartment. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the 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 merely illustrative and not intended to limit the invention.

[0018] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0019] An embodiment of the present invention provides a waste heat power generation and thermal management synergistic utilization system for new energy vehicles, including an organic Rankine cycle waste heat power generation circuit, a heat pump air conditioning circuit, an engine / range extender cooling circuit, an electric drive system cooling circuit, a passenger compartment heating circuit, and a battery cooling / heating circuit; the evaporator end of the organic Rankine cycle waste heat power generation circuit is configured to recover waste heat from the engine / range extender and electric drive system through a heat exchange component; The system also includes a waste heat recovery interface unit. The organic Rankine cycle waste heat power generation circuit can be thermally integrated with the heat pump air conditioning circuit through the waste heat recovery interface unit, or can be set up independently of the heat pump air conditioning circuit.

[0020] The organic Rankine cycle waste heat power generation circuit includes a high-temperature circuit section and a medium-temperature circuit section; the high-temperature circuit section includes a high-temperature working fluid pump 460, a high-temperature evaporator 470, a high-temperature expander 480, and a high-temperature condenser 490 connected in sequence; the medium-temperature circuit section includes a medium-temperature working fluid pump 500, a regenerator 520, a medium-temperature evaporator 550, a medium-temperature expander 560, a medium-temperature condenser 570, and a low-temperature condenser 200. The difference between different embodiments is as follows: Example 1 Figure 1 As shown, the intermediate temperature circuit section of Embodiment 1 further includes a sixteenth three-way valve 510, a first shut-off valve 530, a second shut-off valve 540, a third shut-off valve 620, a third electronic expansion valve 630, and a seventeenth three-way valve 580; the outlet of the intermediate temperature working fluid pump 500 is selectively connected to the regenerator 520 or a bypass via the sixteenth three-way valve 510; the first outlet of the regenerator 520 is connected to the second inlet of the high-temperature condenser 490 and bypassed to the first shut-off valve 530; the second outlet of the high-temperature condenser 490... After the second shut-off valve 540 and the first shut-off valve 530 are combined, they are connected to the inlet of the medium-temperature evaporator 550; the outlet of the medium-temperature evaporator 550 is connected to the inlet of the medium-temperature expander 560 and to the bypass via the third shut-off valve 620; the outlet of the medium-temperature expander 560 is connected to the regenerator 520 and then to the medium-temperature condenser 570; the outlet of the medium-temperature condenser 570 is selectively connected to the medium-temperature working fluid pump 500 or the low-temperature condenser 200 via the seventeenth three-way valve 580.

[0021] Example 2 Figure 2As shown, the intermediate temperature circuit in Embodiment 2 further includes a first shut-off valve 530, a second shut-off valve 540, and a seventeenth three-way valve 580; the outlet of the intermediate temperature working fluid pump 500 is connected to the regenerator 520; the first outlet of the regenerator 520 is connected to the second inlet of the high-temperature condenser 490 and bypasses to the first shut-off valve 530; the second outlet of the high-temperature condenser 490 is connected to the inlet of the intermediate temperature evaporator 550 after merging with the first shut-off valve 530 via the second shut-off valve 540; the outlet of the intermediate temperature evaporator 550 is connected to the inlet of the intermediate temperature expander 560; the outlet of the intermediate temperature expander 560 is connected to the regenerator 520 and then to the intermediate temperature condenser 570; the outlet of the intermediate temperature condenser 570 is selectively connected to either the intermediate temperature working fluid pump 500 or the low-temperature condenser 200 according to the seventeenth three-way valve 580.

[0022] The heat pump air conditioning circuit includes a compressor 100, a first four-way valve 110, an outdoor heat exchanger 120, a first three-way valve 130, a second three-way valve 140, a first electronic expansion valve 151, a second electronic expansion valve 152, a third three-way valve 160, an indoor evaporator 171, an indoor condenser 172, a battery cooler 173, a fourth three-way valve 180, a fifth three-way valve 190, a low-temperature condenser 200, a sixth three-way valve 210 (for Embodiment 1), and a gas-liquid separator 220; wherein, the first... The first, second, third, and fourth ports of a four-way valve 110 are respectively connected to the outlet of the compressor 100, the first port of the outdoor heat exchanger 120, the second port of the sixth three-way valve 210 (for Embodiment 1) or the inlet of the gas-liquid separator 220 (for Embodiment 2), and the second outlet of the low-temperature condenser 200; the first, second, and third ports of the first three-way valve 130 are respectively connected to the second port of the outdoor heat exchanger 120 and the second three-way valve 140. The third port is connected to the third port of the sixteenth three-way valve 510 (for Embodiment 1) or the second port of the nineteenth three-way valve 650 (for Embodiment 2); the first and second ports of the second three-way valve 140 are respectively connected to the first port of the first electronic expansion valve 151 and the first port of the second electronic expansion valve 152; the first, second, and third ports of the third three-way valve 160 are respectively connected to the second port of the first electronic expansion valve 151, the inlet of the indoor evaporator 171, and the outlet of the indoor condenser 172; the first, second, and third ports of the fourth three-way valve 180 are respectively connected to the first port of the fifth three-way valve 190, the inlet of the indoor condenser 172, and the outlet of the indoor evaporator 171; the second and third ports of the fifth three-way valve 190 are respectively connected to the first refrigerant port of the low-temperature condenser 200 and the second refrigerant port of the battery cooler 173; the outlet of the gas-liquid separator 220 is connected to the inlet of the compressor 100; For Embodiment 1: The first port and the third port of the sixth three-way valve 210 are respectively connected to the outlet of the third electronic expansion valve 630 and the inlet of the gas-liquid separator 220; For Embodiment 2: The first port and the third port of the nineteenth three-way valve 650 are respectively connected to the inlet of the outdoor heat exchanger 120 and the second port of the first four-way valve 110; the third port of the first four-way valve 110 is connected to the inlet of the gas-liquid separator 220.

[0023] The engine / range extender cooling circuit includes a third electronic water pump 380, an engine / range extender 390, a thermostat 400, an eighth three-way valve 260, a ninth three-way valve 270, an eight-way valve 280, a thirteenth three-way valve 290, a fourteenth three-way valve 410, a high-temperature radiator 420, and an engine / range extender coolant reservoir 430. The cooling circuit of the electric drive system includes a first electronic water pump 230, a drive motor 241, a motor controller 242, a DC converter 243, an inverter 244, a seventh three-way valve 250, an eighth three-way valve 260, a ninth three-way valve 270, an eight-way valve 280, a thirteenth three-way valve 290, an eleventh three-way valve 300, an electric drive coolant reservoir 310, a medium-temperature radiator 610, a fourth electronic water pump 590, an eighteenth three-way valve 600, and a second four-way valve 350.

[0024] The crew cabin heating circuit includes an eight-way valve 280, a fifteenth three-way valve 440, and a heater core 450.

[0025] The battery cooling / heating circuit includes a second electronic water pump 320, a twelfth three-way valve 330, a battery cooler 173, a thirteenth three-way valve 340, a second four-way valve 350, a battery pack liquid cooling plate 360, and a power battery pack 370.

[0026] The first to eighth ports of the eight-way valve 280 are respectively connected to the second port of the thirteenth-way valve 290, the inlet of the medium-temperature radiator 610, the third port of the twelfth-way valve 330, the outlet of the heater core 450, the second port of the fifteenth-way valve 440, the coolant outlet of the medium-temperature condenser 570, the coolant outlet of the medium-temperature evaporator 550, and the first port of the ninth-way valve 270; the first to fourth ports of the second four-way valve 350 are respectively connected to the inlet of the battery pack liquid cooling plate 360, the third port of the eighteenth-way valve 600, the third port of the eleventh-way valve 300, and the second port of the thirteenth-way valve 340; the first, second, and third ports of the seventh three-way valve 250 are respectively connected to the third port of the eighth three-way valve 260, the outlet of the drive motor 241, and the outlet of the inverter 244; the first and second ports of the eighth three-way valve 260 are respectively connected to the second port of the thermostat 400 and the second port of the ninth three-way valve 270. The third port of the ninth three-way valve 270 is connected to the coolant inlet of the medium-temperature evaporator 550; the first port of the thirteenth three-way valve 290 is connected to the inlet of the high-temperature radiator 420 and the third port of the fourteenth three-way valve 410; the third port of the thirteenth three-way valve 290 is connected to the first port of the eleventh three-way valve 300; the second port of the eleventh three-way valve 300 is connected to the inlet of the first electronic water pump 230; the first and second ports of the twelfth three-way valve 330 are respectively connected to the coolant inlet of the battery cooler 173 and the second electronic water pump 320; the first and third ports of the thirteenth three-way valve 340 are respectively connected to the third port of the fifteenth three-way valve 440 and the coolant outlet of the battery cooler 173; the first port of the fifteenth three-way valve 440 is connected to the inlet of the heater core 450; the first and second ports of the eighteenth three-way valve 600 are respectively connected to the coolant inlet of the medium-temperature condenser 570 and the outlet of the fourth electronic water pump 590.

[0027] Based on the determined operating mode, the controller adjusts the on / off status or opening degree of the compressor, pump, expander and various valve components in the system to control the flow path and flow rate of refrigerant, coolant and organic Rankine cycle working fluid.

[0028] In this embodiment of the invention, the components in the system are further described as follows: the electric drive system includes a drive motor 241, a motor controller 242, a DC converter 243, and an inverter 244; the radiator module 660 includes an outdoor heat exchanger 120, a medium-temperature radiator 610, a high-temperature radiator 420, and a fan; the passenger compartment 670 includes a heater core 450, an indoor evaporator 171, an indoor condenser 172, and a blower.

[0029] An embodiment of the present invention provides a control method for a new energy vehicle waste heat power generation and thermal management synergistic utilization system, based on the above system, comprising the following steps: Step 1: Acquire vehicle thermal management requirements and environmental status signals; Step 2: Determine the system operation mode based on the signal. The operation mode includes at least the following: summer cooling and waste heat recovery power generation mode, spring and autumn waste heat recovery power generation mode, winter low temperature waste heat recovery mode, and deep low temperature waste heat recovery mode. Step 3: Based on the determined operating mode, the controller adjusts the on / off state or opening degree of the compressor, pump, expander and various valve components in the system to switch the flow path and flow rate of refrigerant, coolant and organic Rankine cycle working fluid, thereby ensuring that the power battery, electric drive system, engine / range extender and passenger compartment are all within the target temperature range under different operating conditions, and maximizing waste heat power generation efficiency.

[0030] As a preferred embodiment of the present invention, for the summer cooling and waste heat recovery power generation mode: Operating Condition 1: Summer Operating Condition (Hybrid Drive, Passenger Cabin Cooling, Battery Cooling, ORC Operating Mode) like Figure 3 (Corresponding to Example 1) Figure 4 (Corresponding to Example 2) and Figure 19 As shown, when the vehicle is in high summer temperatures and in a hybrid driving state, the system enters a cooling and power generation coordinated mode. In this mode, the control logic of each subsystem is as follows: (1) Heat pump air conditioning circuit control; General control: Controls compressor 100 to start; controls the first port of the first four-way valve 110 to connect with the second port, and the third port to connect with the fourth port, so that the refrigerant is in a refrigeration cycle state; controls the first port of the first three-way valve 130 to connect with the second port; controls all three ports of the second three-way valve 140 to open to distribute the refrigerant flow; controls the first electronic expansion valve 151 and the second electronic expansion valve 152 to be in the open working state for throttling and pressure reduction; controls the first port of the third three-way valve 160 to connect with the second port and close the third port; controls the blower to start to deliver cold air to the passenger compartment; simultaneously, controls the first port of the fourth three-way valve 180 to connect with the third port and close the second port; controls all three ports of the fifth three-way valve 190 to be in the open state. For Example 1: The second and third ports of the sixth three-way valve 210 are connected, while the first port is closed, allowing the return gas to enter the gas-liquid separator 220.

[0031] For Embodiment 2: The first and third ports of the nineteenth three-way valve 650 are opened, and the second port is closed, connecting the compressor exhaust side with the outdoor heat exchanger 120.

[0032] (2) Power system and cooling circuit control The system controls the activation of the first electronic water pump 230 and the third electronic water pump 380 to maintain the cooling circulation between the electric drive system and the engine / range extender. It controls all three ports of the seventh three-way valve 250, the eighth three-way valve 260, and the tenth three-way valve 290 to be open (or adjusted according to flow requirements); it controls the connection between the second and third ports of the ninth three-way valve 270; and it controls the connection between the first and second ports of the eleventh three-way valve 300, while closing the third port. It controls all three ports of the fourteenth three-way valve 410 to be open, and adjusts the opening of the first and third ports according to the coolant temperature to balance heat dissipation and waste heat recovery. It also controls the fan to activate to assist the radiator module 660 in cooling.

[0033] (3) Battery cooling circuit control The system controls the second electronic water pump 320 to start; controls the first port of the twelfth three-way valve 330 to connect with the second port and close the third port; controls the second port of the thirteenth three-way valve 340 to connect with the third port and close the first port; and controls the first port of the second four-way valve 350 to connect with the fourth port. In this state, the battery circuit coolant flows through the battery cooler 173 and exchanges heat with the refrigerant in the heat pump circuit, thereby cooling the power battery pack 370.

[0034] (4) Organic Rankine loop control The system controls the activation of the high-temperature working fluid pump 460 and the medium-temperature working fluid pump 500 to drive the working fluid circulation and generate electricity. It also controls the activation of the fourth electronic water pump 590 to provide a cooling source for the condenser.

[0035] For Example 1: Control the first port of the sixteenth three-way valve 510 to connect with the second port and the third port to close; control the first stop valve 530 and the third stop valve 620 to close, and control the second stop valve 540 to open; control the second port of the seventeenth three-way valve 580 to connect with the third port and the first port to close; control the first port of the eighteenth three-way valve 600 to connect with the second port and the third port to close.

[0036] For Embodiment 2: Control the first shut-off valve 530 to shut off and the second shut-off valve 540 to open; control the second port of the seventeenth three-way valve 580 to connect with the third port and close the first port; control the first port of the eighteenth three-way valve 600 to connect with the second port and close the third port.

[0037] Regarding the control of the eight-way valve 280: the seventh port of the eight-way valve 280 is connected to the first port, and the sixth port is connected to the second port, so as to guide the high-temperature coolant to the heat utilization side.

[0038] Operating Condition 2: Summer Operating Condition (Pure Electric Drive, Passenger Cabin Cooling, Battery Cooling, ORC Operating Mode) like Figure 3 (Corresponding to Example 1) Figure 4 (Corresponding to Example 2) and Figure 19 As shown, when the vehicle is in high summer temperatures and in pure electric drive mode, the engine / range extender stops working, and only the electric drive system operates, generating residual heat. In this mode, the system's control logic is based on condition one and performs the following adjustments: (1) Adjustment of power system and cooling circuit: The third electronic water pump 380 is shut down to stop the engine / range extender cooling circulation; the first ports of the eighth three-way valve 260 and the thirteenth-way valve 290 are closed, thereby cutting off the coolant flow path of the engine / range extender.

[0039] (2) Adjustment of the organic Rankine loop: Since there is no high-temperature heat source, the high-temperature working fluid pump 460 is shut down, stopping the high-temperature circuit circulation. The first shut-off valve 530 is opened, and the second shut-off valve 540 is shut off. At this time, the working fluid pumped out by the medium-temperature working fluid pump 500 does not pass through the high-temperature circuit and directly enters the medium-temperature circulation path, using the waste heat of the electric drive system to generate electricity (medium-temperature ORC mode).

[0040] The control status of the remaining heat pump air conditioning circuit, battery cooling circuit, and electric drive system cooling circuit remains consistent with operating condition one.

[0041] Operating Condition 3: Summer Operating Condition (Engine Driven, Passenger Cabin Cooled, Battery Not Working / Not Cooled, ORC Operating Mode) like Figure 3 (Corresponding to Example 1) Figure 4 (Corresponding to Example 2) and Figure 19 As shown, when the vehicle is in high summer temperatures and the engine is running, the electric drive system stops working, and only the engine / range extender operates to generate residual heat. In this mode, the system's control logic is based on condition one and performs the following adjustments: (1) Adjustment of the cooling circuit of the electric drive system: The first electronic water pump 230 is shut down; the third ports of the eighth three-way valve 260 and the thirteenth three-way valve 290 are shut down to disconnect the electric drive system from the waste heat utilization circuit and prevent heat backflow or unnecessary circulation.

[0042] (2) Adjustment of battery cooling circuit: Since the battery is not in operation, the second electronic water pump 320 is turned off.

[0043] (3) Adjustment of heat pump air conditioning circuit: In the heat pump air conditioning circuit, the second port of the second three-way valve 140 is closed (i.e., the branch to the battery cooler is cut off, and the full flow goes to the evaporator in the passenger compartment); the second electronic expansion valve 152 is stopped (cut off); and the third port of the fifth three-way valve 190 is closed to isolate the return gas line of the battery cooler.

[0044] The control status of the remaining heat pump air conditioning circuits (for passenger cabin cooling) and organic Rankine cycle circuits remains consistent with that of operating condition one.

[0045] As a preferred embodiment of the present invention, for the waste heat recovery power generation mode in spring and autumn: Operating Condition 4: Spring and Autumn Operating Conditions (Hybrid Drive, Battery Cooling, ORC Operating Mode) like Figure 5 (Corresponding to Example 1) Figure 6 (Corresponding to Example 2) and Figure 19 As shown, when the vehicle is in spring / autumn and in hybrid driving mode, the battery requires cooling, while simultaneously generating electricity using waste heat from the engine and electric drive. The control logic for each subsystem in this mode is as follows: (1) Heat pump air conditioning circuit control Since the passenger compartment has no need for cooling / heating at this time, and the battery uses liquid cooling, the heat pump system is not working. The compressor 100 is shut down; the blower is shut down; and the first four-way valve 110, the first three-way valve 130, the second three-way valve 140, the third three-way valve 160, the fourth three-way valve 180, the fifth three-way valve 190, the sixth three-way valve 210, and the nineteenth three-way valve 650 (for Embodiment 2) are all kept closed or de-energized. The first electronic expansion valve 151 and the second electronic expansion valve 152 are shut off (closed), cutting off refrigerant flow.

[0046] (2) Power system and cooling circuit control The system controls the activation of the first electronic water pump 230 and the third electronic water pump 380 to maintain the cooling circulation between the electric drive system and the engine / range extender. It controls all three ports of the seventh three-way valve 250, the eighth three-way valve 260, and the tenth three-way valve 290 to be open (or adjusted according to flow requirements); it controls the second and third ports of the ninth three-way valve 270 to be connected, while the first port is closed; it controls the first and second ports of the eleventh three-way valve 300 to be connected, while the third port is closed. It controls all three ports of the fourteenth three-way valve 410 to be open, and adjusts the opening of the first and third ports according to the coolant temperature. It controls the fan to be activated, using ambient air cooling to cool the coolant in the radiator module 660.

[0047] (3) Battery cooling circuit control The second electronic water pump 320 is turned on. The second and third ports of the twelfth three-way valve 330 are connected, while the first port is closed. The first and second ports of the second four-way valve 350 are connected, connecting the coolant circuit of the power battery pack 370 to the circuit containing the intermediate-temperature radiator 610 (instead of flowing through the battery cooler). The intermediate-temperature radiator 610 directly dissipates the battery heat to the atmosphere, achieving energy-saving passive liquid cooling.

[0048] (4) Organic Rankine loop control The system controls the activation of the high-temperature working fluid pump 460 and the medium-temperature working fluid pump 500 to drive the working fluid circulation and generate electricity. It also controls the activation of the fourth electronic water pump 590 to provide a cooling source for the medium-temperature condenser.

[0049] For Example 1: Control the first port of the sixteenth three-way valve 510 to connect with the second port and close the third port; control the first stop valve 530 and the third stop valve 620 to close and control the second stop valve 540 to open; control the first port of the seventeenth three-way valve 580 to connect with the second port and close the third port; control all three ports of the eighteenth three-way valve 600 to open.

[0050] For Embodiment 2: Control the first shut-off valve 530 to shut off and the second shut-off valve 540 to open; control the first port of the seventeenth three-way valve 580 to connect with the second port and the third port to close; control the three ports of the eighteenth three-way valve 600 to open.

[0051] Regarding the control of the eight-way valve 280: Control the connection of the seventh port of the eight-way valve 280 with the first port, the sixth port with the second port, and the third port with the second port.

[0052] Operating Condition 5: Spring and Autumn Operating Conditions (Pure Electric Drive, Battery Cooling, ORC Operating Mode) like Figure 5 (Corresponding to Example 1) Figure 6 (Corresponding to Example 2) and Figure 19 As shown, when the vehicle is in spring / autumn and in pure electric drive mode, the engine / range extender stops working, and only the electric drive system operates, generating residual heat. In this mode, the system's control logic is based on condition four and performs the following adjustments: (1) Adjustment of power system and cooling circuit: The third electronic water pump 380 is shut down (stopping the engine / range extender cooling circulation); the first ports of the eighth three-way valve 260 and the thirteenth-way valve 290 are closed, thereby cutting off the coolant flow path of the engine / range extender.

[0053] (2) Adjustment of the organic Rankine loop: Since there is no high-temperature heat source, the high-temperature working fluid pump 460 is shut down, stopping the high-temperature circuit circulation. The first shut-off valve 530 is opened, and the second shut-off valve 540 is shut off. At this time, the working fluid pumped out by the medium-temperature working fluid pump 500 does not pass through the high-temperature circuit and directly enters the medium-temperature circulation path, using the waste heat of the electric drive system to generate electricity (medium-temperature ORC mode).

[0054] The control status of the remaining heat pump air conditioning circuit, battery cooling circuit, and electric drive system cooling circuit remains consistent with that of operating condition four.

[0055] Operating Condition 6: Spring and Autumn Operating Conditions (Engine Driven, Battery Not Working / Not Cooling, ORC Operating Mode) like Figure 5 (Corresponding to Example 1) Figure 6 (Corresponding to Example 2) and Figure 19 As shown, when the vehicle is in spring or autumn and the engine is running, the electric drive system stops working, and only the engine / range extender operates, generating residual heat. In this mode, the system's control logic is based on operating condition four and performs the following adjustments: (1) Adjustment of the cooling circuit of the electric drive system: The first electronic water pump 230 is shut down; the third ports of the eighth three-way valve 260 and the thirteenth three-way valve 290 are shut down to disconnect the electric drive system from the waste heat utilization circuit and prevent heat backflow or unnecessary circulation.

[0056] (2) Adjustment of battery cooling circuit: Since the battery is not in operation, the second electronic water pump 320 is shut down, the third port of the eight-way valve 280 is not connected to the second port, and the third port of the eighteenth three-way valve 600 is shut down.

[0057] The control status of the remaining heat pump air conditioning circuits and organic Rankine cycle circuits remains consistent with that of operating condition four.

[0058] As a preferred embodiment of the present invention, for the winter low-temperature waste heat recovery mode: Operating Condition 7: Winter Low Temperature Operating Condition (Pure Electric Drive, Passenger Cabin Heating, Battery Cooling, ORC Non-Operating Mode) like Figure 7 (Corresponding to Example 1) Figure 8 (Corresponding to Example 2) and Figure 19 As shown, when the vehicle is in a low-temperature winter environment and in pure electric drive mode, the passenger compartment requires heating, but the waste heat from the electric drive system is insufficient to support passenger compartment heating, while the power battery needs cooling. At this time, the organic Rankine cycle circuit does not operate. The control logic of each subsystem is as follows: (1) Heat pump air conditioning circuit control General control: Controls compressor 100 to start; controls the first port of the first four-way valve 110 to connect with the fourth port, and its second port to connect with the third port, so that high-temperature and high-pressure refrigerant enters the indoor condenser 172 to release heat and achieve heating of the passenger compartment; controls the first port of the first three-way valve 130 to connect with the second port, and controls the first electronic expansion valve 151 to work; controls the first port of the second three-way valve 140 to open and the second port to close; controls the first port of the third three-way valve 160 to connect with the third port; controls the first port of the fourth three-way valve 180 and the fifth three-way valve 190 to connect with the second port and the third port to close.

[0059] Regarding Example 1 ( Figure 7 ): Controls the second and third ports of the sixth three-way valve 210 to be connected, and the first port to be closed; after the refrigerant is throttled by the first electronic expansion valve 151, it enters the outdoor heat exchanger 120 (used as an evaporator), and then enters the sixth three-way valve 210 through the first four-way valve.

[0060] Regarding Example 2 ( Figure 8 ): Controls the connection between the first and third ports of the nineteenth three-way valve 650. After the refrigerant is throttled by the first electronic expansion valve 151, it enters the waste heat recovery evaporator 640 and the outdoor heat exchanger 120 (used as an evaporator) in sequence, and then enters the sixth three-way valve 210 through the nineteenth three-way valve 650 and the first four-way valve.

[0061] (2) Crew cabin heating circuit control The first and second ports of the fifteenth three-way valve 440 are connected, while the third port is closed. This controls the blower to start and supply hot air to the crew compartment.

[0062] (3) Battery cooling circuit control The second electronic water pump 320 is turned on, the second and third ports of the twelfth three-way valve 330 are turned on and the first port is turned off, and the first and second ports of the second four-way valve 350 are connected.

[0063] (4) Power system and cooling circuit control Control the first electronic water pump 230 to turn on and the third electronic water pump 380 to turn off; control all three ports of the seventh three-way valve 250 to open; control the second and third ports of the eighth three-way valve 260 and the thirteenth three-way valve 290 to open and the first port to close; control the first and second ports of the ninth three-way valve 270 and the eleventh three-way valve 300 to open and the third port to close; control the fan to turn on.

[0064] (5) Organic Rankine loop control Control the high-temperature working fluid pump 460 and the medium-temperature working fluid pump 500 to shut down; control the fourth electronic water pump 590 to turn on; control the second and third ports of the eighteenth three-way valve 600 to open, and the first port to close. Control of the eight-way valve 280: Connect the eighth port of the eight-way valve 280 to the fifth port, the fourth port to the first port, and the third port to the second port.

[0065] Operating Condition 8: Winter Low Temperature Operating Condition (Pure Electric Drive, Passenger Cabin Heating, Battery Heating, ORC Non-Operating Mode) like Figure 7 (Corresponding to Example 1) Figure 8 (Corresponding to Example 2) and Figure 19 As shown, when the vehicle is in low winter temperatures and in pure electric drive mode, the residual heat generated by the electric drive system alone is insufficient to support the heating of the passenger compartment and battery. In this mode, the system's control logic is based on operating condition seven and performs the following adjustments: (1) Crew cabin heating circuit control The three ports of the fifteenth three-way valve 440 are all opened, allowing the coolant of the electric drive system to flow into the heater core 450 and the battery heating circuit simultaneously.

[0066] (2) Battery heating system control The first port of the thirteenth three-way valve 340 is connected to the second port, and the first port of the second four-way valve 350 is connected to the fourth port, so that the high-temperature coolant enters the battery circuit to release heat to the battery.

[0067] (3) Organic Rankine loop control Control the fourth electronic water pump 590 to shut down.

[0068] Control of the eight-way valve 280: Connect the eighth port of the eight-way valve 280 to the fifth port, the fourth port to the first port, and the third port to the first port.

[0069] The control status of the remaining heat pump air conditioning circuit and engine / range extender cooling circuit remains consistent with that of operating condition seven.

[0070] Operating Condition 9: Winter Low Temperature Operating Condition (Pure Electric Drive, Passenger Cabin Heating, Battery Cooling, ORC Operating Mode) like Figure 9 (Corresponding to Example 1) Figure 10 (Corresponding to Example 2) and Figure 19 As shown, when the vehicle is in a low-temperature winter environment and in pure electric drive mode, the passenger compartment requires heating. The waste heat from the electric drive system is sufficient to support passenger compartment heating, while the power battery needs cooling. At this time, the organic Rankine loop operates, and the heat pump air conditioning system does not work. The control logic of each subsystem is as follows: (1) Heat pump air conditioning circuit control Since the residual heat from the electric drive system is sufficient to support cabin heating, and the battery uses liquid cooling, the heat pump system does not operate. The compressor 100 is shut down; the blower is shut down; and the first four-way valve 110, the first three-way valve 130, the second three-way valve 140, the third three-way valve 160, the fourth three-way valve 180, the fifth three-way valve 190, the sixth three-way valve 210, and the nineteenth three-way valve 650 (for Embodiment 2) are all kept closed or de-energized. The first electronic expansion valve 151 and the second electronic expansion valve 152 are shut off (closed), cutting off refrigerant flow.

[0071] (2) Power system and cooling circuit control Control the first electronic water pump 230 to turn on and the third electronic water pump 380 to turn off; control all three ports of the seventh three-way valve 250 to open; control the second and third ports of the eighth three-way valve 260 and the thirteenth three-way valve 290 to open and the first port to close; control all three ports of the ninth three-way valve 270 to open and adjust the opening of the first and third ports according to the heating load requirements of the crew cabin; control the first and second ports of the eleventh three-way valve 300 to open and the third port to close; control the fan to turn on.

[0072] (3) Crew cabin heating circuit control The first and second ports of the fifteenth three-way valve 440 are connected, while the third port is closed. This controls the blower to start and supply hot air to the crew compartment.

[0073] (4) Battery cooling circuit control The second electronic water pump 320 is turned on, the second and third ports of the twelfth three-way valve 330 are turned on and the first port is turned off, and the first and second ports of the second four-way valve 350 are connected.

[0074] (5) Organic Rankine loop control Control the high-temperature working fluid pump 460 to shut down, control the medium-temperature working fluid pump 500 to turn on, control the first shut-off valve 530 to turn on, control the second shut-off valve 540 to turn off, control the first and second ports of the seventeenth three-way valve 580 to turn on, and the third port to turn off; control the fourth electronic water pump 590 to turn on, and control all three ports of the eighteenth three-way valve 600 to turn on. Regarding Example 1 ( Figure 9 ): Controls the first and second ports of the sixteenth three-way valve 510 to open, and the third port to close, controlling the third shut-off valve 620 to shut off.

[0075] Regarding Example 2 ( Figure 10 The outlet of the medium-temperature working fluid pump 500 is directly connected to the regenerator 520.

[0076] Control of the eight-way valve 280: Connect the eighth port of the eight-way valve 280 to the fifth port, the fourth port to the first port, the third port to the second port, the seventh port to the first port, and the sixth port to the second port.

[0077] Operating Condition 10: Winter Low Temperature Operating Condition (Pure Electric Drive, Passenger Cabin Heating, Battery Heating, ORC Operating Mode) like Figure 9 (Corresponding to Example 1) Figure 10 (Corresponding to Example 2) and Figure 19 As shown, when the vehicle is in low winter temperatures and in pure electric drive mode, the residual heat generated by the electric drive system is sufficient to support the heating of the passenger compartment and battery. In this mode, the system's control logic is based on operating condition seven and performs the following adjustments: (1) Crew cabin heating circuit control The three ports of the fifteenth three-way valve 440 are all opened, allowing the coolant of the electric drive system to flow into the heater core 450 and the battery heating circuit simultaneously.

[0078] (2) Battery heating system control The first port of the thirteenth three-way valve 340 is connected to the second port, and the first port of the second four-way valve 350 is connected to the fourth port, so that the high-temperature coolant enters the battery circuit to release heat to the battery.

[0079] (3) Organic Rankine loop control The third port of the eighteenth three-way valve 600 is closed.

[0080] Control of the eight-way valve 280: Connect the eighth port of the eight-way valve 280 to the fifth port, the fourth port to the first port, the third port to the first port, the seventh port to the first port, and the sixth port to the second port.

[0081] The control status of the remaining heat pump air conditioning circuits and engine / range extender cooling circuits remains consistent with that of operating condition nine.

[0082] Operating Condition 11: Winter Low Temperature Operating Conditions (Hybrid Drive, Passenger Cabin Heating, Battery Cooling, ORC Operating Mode) like Figure 11 (Corresponding to Example 1) Figure 12 (Corresponding to Example 2) and Figure 19 As shown, when the vehicle is in a low-temperature winter environment and in hybrid driving mode, the passenger compartment requires heating. The system's waste heat is sufficient to support passenger compartment heating, while the power battery needs cooling. At this time, the Organic Rankine Cycle (ORC) loop operates, and the heat pump air conditioning system does not work. The control logic of each subsystem is as follows: (1) Heat pump air conditioning circuit control Since the residual heat from the electric drive system is sufficient to support cabin heating, and the battery uses liquid cooling, the heat pump system does not operate. The compressor 100 is shut down; the blower is shut down; and the first four-way valve 110, the first three-way valve 130, the second three-way valve 140, the third three-way valve 160, the fourth three-way valve 180, the fifth three-way valve 190, the sixth three-way valve 210, and the nineteenth three-way valve 650 (for Embodiment 2) are all kept closed or de-energized. The first electronic expansion valve 151 and the second electronic expansion valve 152 are shut off (closed), cutting off refrigerant flow.

[0083] (2) Power system and cooling circuit control Control the first electronic water pump 230 and the third electronic water pump 380 to turn on; control all three ports of the seventh three-way valve 250, the eighth three-way valve 260, the ninth three-way valve 270, and the eleventh three-way valve 290 to open; control the first and second ports of the eleventh three-way valve 300 to open, and the third port to close; control all three ports of the fourteenth three-way valve 410 to open, and adjust the opening degree of the first and third ports according to the coolant temperature to balance the heat dissipation and waste heat recovery; control the fan to turn on.

[0084] (3) Crew cabin heating circuit control The first and second ports of the fifteenth three-way valve 440 are connected, while the third port is closed. This controls the blower to start and supply hot air to the crew compartment.

[0085] (4) Battery cooling circuit control The second electronic water pump 320 is turned on, the second and third ports of the twelfth three-way valve 330 are turned on and the first port is turned off, and the first and second ports of the second four-way valve 350 are connected.

[0086] (5) Organic Rankine loop control Control the high-temperature working fluid pump 460 and the medium-temperature working fluid pump 500 to start, control the first shut-off valve 530 to shut off, control the second shut-off valve 540 to start, control the first and second ports of the seventeenth three-way valve 580 to start, and the third port to close; control the fourth electronic water pump 590 to start, and control all three ports of the eighteenth three-way valve 600 to start. Regarding Example 1 ( Figure 11 ): Controls the first and second ports of the sixteenth three-way valve 510 to open, and the third port to close, controlling the third shut-off valve 620 to shut off.

[0087] Regarding Example 2 ( Figure 12 The outlet of the medium-temperature working fluid pump 500 is directly connected to the regenerator 520.

[0088] Control of the eight-way valve 280: Connect the eighth port of the eight-way valve 280 to the fifth port, the fourth port to the first port, the third port to the second port, the seventh port to the first port, and the sixth port to the second port.

[0089] Operating Condition 12: Winter Low Temperature Operating Condition (Hybrid Drive, Passenger Cabin Heating, Battery Heating, ORC Operating Mode) like Figure 11 (Corresponding to Example 1) Figure 12 (Corresponding to Example 2) and Figure 19 As shown, when the vehicle is in low winter temperatures and in hybrid driving mode, the system generates sufficient residual heat to support heating of the passenger compartment and battery, and the power battery also needs to be heated. In this mode, the system's control logic is based on operating condition eleven and performs the following adjustments: (1) Crew cabin heating circuit control The three ports of the fifteenth three-way valve 440 are all opened, allowing the coolant of the electric drive system to flow into the heater core 450 and the battery heating circuit simultaneously.

[0090] (2) Battery heating system control The first port of the thirteenth three-way valve 340 is connected to the second port, and the first port of the second four-way valve 350 is connected to the fourth port, so that the high-temperature coolant enters the battery circuit to release heat to the battery.

[0091] (3) Organic Rankine Cycle (ORC) loop control The third port of the eighteenth three-way valve 600 is closed.

[0092] Control of the eight-way valve 280: Connect the eighth port of the eight-way valve 280 to the fifth port, the fourth port to the first port, the third port to the first port, the seventh port to the first port, and the sixth port to the second port.

[0093] The control status of the remaining heat pump air conditioning circuits and engine / range extender cooling circuits remains consistent with that of operating condition nine.

[0094] Operating Condition 13: Winter Low Temperature Operating Condition (Engine Driven, Passenger Cabin Heated, ORC Operating Mode) like Figure 11 (Corresponding to Example 1) Figure 12 (Corresponding to Example 2) and Figure 19 As shown, when the vehicle is in a low-temperature winter environment and the engine is running, the passenger compartment requires heating, and the system's waste heat is sufficient to support passenger compartment heating. At this time, the Organic Rankine Cycle (ORC) loop operates, and the heat pump air conditioning system does not work. The control logic of each subsystem is as follows: (1) Heat pump air conditioning circuit control Since the residual heat from the electric drive system is sufficient to support cabin heating, and the battery uses liquid cooling, the heat pump system does not operate. The compressor 100 is shut down; the blower is shut down; and the first four-way valve 110, the first three-way valve 130, the second three-way valve 140, the third three-way valve 160, the fourth three-way valve 180, the fifth three-way valve 190, the sixth three-way valve 210, and the nineteenth three-way valve 650 (for Embodiment 2) are all kept closed or de-energized. The first electronic expansion valve 151 and the second electronic expansion valve 152 are shut off (closed), cutting off refrigerant flow.

[0095] (2) Power system and cooling circuit control Control the first electronic water pump 230 to shut down and the third electronic water pump 380 to turn on; control the first and second ports of the eighth three-way valve 260 and the thirteenth three-way valve 290 to connect and the third port to close, and control all three ports of the ninth three-way valve 270 to open; control all three ports of the fourteenth three-way valve 410 to open, and adjust the opening of the first and third ports according to the coolant temperature to balance the heat dissipation and waste heat recovery; control the fan to turn on.

[0096] (3) Crew cabin heating circuit control The first and second ports of the fifteenth three-way valve 440 are connected, while the third port is closed. This controls the blower to start and supply hot air to the crew compartment.

[0097] (4) Battery cooling circuit control Control the second electronic water pump 320 to shut down.

[0098] (5) Organic Rankine loop control Control the high-temperature working fluid pump 460 and the medium-temperature working fluid pump 500 to start, control the first shut-off valve 530 to shut off, control the second shut-off valve 540 to start, control the first and second ports of the seventeenth three-way valve 580 to start, and the third port to close; control the fourth electronic water pump 590 to start, and control the first and second ports of the eighteenth three-way valve 600 to start, and the third port to close. Regarding Example 1 ( Figure 11 ): Controls the first and second ports of the sixteenth three-way valve 510 to open, and the third port to close, controlling the third shut-off valve 620 to shut off.

[0099] Regarding Example 2 ( Figure 12 The outlet of the medium-temperature working fluid pump 500 is directly connected to the regenerator 520.

[0100] Control of the eight-way valve 280: Connect the eighth port of the eight-way valve 280 to the fifth port, the fourth port to the first port, the seventh port to the first port, and the sixth port to the second port.

[0101] As a preferred embodiment of the present invention, for the deep cryogenic waste heat recovery mode: Operating Condition 14: Deep Cryogenic Condition (Pure Electric Drive, Passenger Cabin Heating, Battery Heating, ORC Inactive Mode) like Figure 13 (Corresponding to Example 1) Figure 14 (Corresponding to Example 2) and Figure 19 As shown, when the vehicle is in a deep winter environment and in pure electric drive mode, the air source heat pump air conditioning system cannot operate normally or has extremely low efficiency. Both the passenger compartment and the battery require heating, but the system's waste heat is insufficient to support heating of these areas. At this time, the organic Rankine loop does not operate, and the heat pump air conditioning system operates. The control logic of each subsystem is as follows: (1) Heat pump air conditioning circuit control General control: Controls compressor 100 to start; controls the first port of the first four-way valve 110 to connect with the fourth port IV, and its second port to connect with the third port, allowing high-temperature and high-pressure refrigerant to enter the indoor condenser 172 and battery cooler 173 to release heat, thereby achieving heating for the crew compartment and battery; controls the second port of the first three-way valve 130 to connect with the third port, controlling the first electronic expansion valve 151 and the second electronic expansion valve 152 to operate; controls all three ports of the second three-way valve 140 and the fifth three-way valve 190 to open; controls the first port of the third three-way valve 160 to connect with the third port; controls the first port of the fourth three-way valve 180 to connect with the second port, and the third port to close.

[0102] Regarding Example 1 ( Figure 13 The refrigerant passes through the first electronic expansion valve 151, then through the first three-way valve 130 to the sixteenth three-way valve 510, which controls the opening of the first shut-off valve 530 and the third shut-off valve 620, and the shut-off of the second shut-off valve 540. It then enters the medium-temperature evaporator 550 (used as a waste heat recovery evaporator), and then through the third expansion valve 630 (which adjusts the pressure change in the pipeline when the mode is switched), which controls the opening of the first and third ports of the sixth three-way valve 210, and the closing of the second port, before returning to the gas-liquid separator 220. Regarding Example 2 ( Figure 14 The refrigerant, after being throttled by the first electronic expansion valve 151, enters the waste heat recovery evaporator 640. After passing through the first three-way valve 130, it controls the connection between the second and third ports of the nineteenth three-way valve 650, enters the second port of the nineteenth three-way valve 650, and then returns to the second port of the first four-way valve from the third port of the nineteenth three-way valve 650, and then returns to the gas-liquid separator 220.

[0103] (2) Power system and cooling circuit control The system controls the first electronic water pump 230 to start and the third electronic water pump 380 to stop; it controls all three ports of the seventh three-way valve 250 to open; it controls the second and third ports of the eighth, thirteenth, and ninth three-way valves 260, 290, and 270 to open, and the first port to close; it controls the first and second ports of the eleventh three-way valve 300 to open, and the third port to close. If the system's residual heat is insufficient to support the heat pump system, a motor stall method is used to increase the system's heat output.

[0104] (3) Crew cabin heating circuit control Control the blower to turn on and provide hot air to the crew cabin.

[0105] (4) Battery heating circuit control The system controls the second electronic water pump 320 to turn on, controls the first and second ports of the twelfth three-way valve 330 to open and the third port to close, controls the second and third ports of the thirteenth three-way valve 340 to open and the first port to close, and controls the first and fourth ports of the second four-way valve 350 to connect, so that the battery circuit coolant is heated by the battery cooler.

[0106] (5) Organic Rankine loop control Control the high-temperature working fluid pump 460 and the medium-temperature working fluid pump 500 to shut down; control the fourth electronic water pump 590 to shut down; control the first shut-off valve 530 and the third shut-off valve 620 to open, and the second shut-off valve 540 to shut down, so that the fluid enters the medium-temperature evaporator 550 (used as a waste heat recovery evaporator). For the control of the 8-way valve 280: Regarding Example 1 ( Figure 13 ): Controls the connection between the seventh port and the first port of the eight-way valve 280; Regarding Example 2 ( Figure 14 ): Controls the connection between the eighth port and the first port of the eight-way valve 280.

[0107] Operating Condition 15: Deep Cryogenic Condition (Hybrid Drive, Crew Cabin Heating, Battery Heating, ORC Operating Mode) like Figure 15 (Corresponding to Example 1) Figure 16 (Corresponding to Example 2) and Figure 19 As shown, when the vehicle is in a deep winter environment and in hybrid driving mode, both the passenger compartment and the battery require heating, and the system's waste heat is sufficient to support heating for both. At this time, the organic Rankine loop operates, and the heat pump air conditioning system does not work. The control logic of each subsystem is as follows: (1) Heat pump air conditioning circuit control Since the residual heat from the electric drive system is sufficient to support cabin heating, and the battery uses liquid cooling, the heat pump system does not operate. The compressor 100 is shut down; the blower is shut down; and the first four-way valve 110, the first three-way valve 130, the second three-way valve 140, the third three-way valve 160, the fourth three-way valve 180, the fifth three-way valve 190, the sixth three-way valve 210, and the nineteenth three-way valve 650 (for Embodiment 2) are all kept closed or de-energized. The first electronic expansion valve 151 and the second electronic expansion valve 152 are shut off (closed), cutting off refrigerant flow.

[0108] (2) Power system and cooling circuit control Control the first electronic water pump 230 and the third electronic water pump 380 to turn on; control all three ports of the seventh three-way valve 250, the eighth three-way valve 260, the ninth three-way valve 270, and the eleventh three-way valve 290 to open; control the first and second ports of the eleventh three-way valve 300 to open, and the third port to close; control all three ports of the fourteenth three-way valve 410 to open, and adjust the opening degree of the first and third ports according to the coolant temperature to balance the heat dissipation and waste heat recovery; control the fan to turn on.

[0109] (3) Crew cabin heating circuit control Control all three ports of the fifteenth three-way valve 440 to open; control the blower to start and provide hot air to the crew compartment.

[0110] (4) Battery heating circuit control The system controls the second electronic water pump 320 to turn on, controls the second and third ports of the twelfth three-way valve 330 to open and the first port to close, controls the first and second ports of the thirteenth three-way valve 340 to open and the third port to close, and controls the first and fourth ports of the second four-way valve 350 to connect.

[0111] (5) Organic Rankine Cycle (ORC) loop control Control the high-temperature working fluid pump 460 and the medium-temperature working fluid pump 500 to start, control the first shut-off valve 530 to shut off, control the second shut-off valve 540 to start, control the first and second ports of the seventeenth three-way valve 580 to start, and the third port to close; control the fourth electronic water pump 590 to start, and control the first and second ports of the eighteenth three-way valve 600 to start, and the third port to close. Regarding Example 1 ( Figure 11 ): Controls the first and second ports of the sixteenth three-way valve 510 to open, and the third port to close, controlling the third shut-off valve 620 to shut off.

[0112] Regarding Example 2 ( Figure 12 The outlet of the medium-temperature working fluid pump 500 is directly connected to the regenerator 520.

[0113] Control of the eight-way valve 280: Connect the eighth port of the eight-way valve 280 to the fifth port, the fourth port to the first port, the third port to the first port, the seventh port to the first port, and the sixth port to the second port.

[0114] Operating Condition 16: Deep Cryogenic Condition (Engine Driven, Crew Cabin Heated, ORC Operating Mode) like Figure 15 (Corresponding to Example 1) Figure 16 (Corresponding to Example 2) and Figure 19 As shown, when the vehicle is in a deep winter environment with the engine running, the passenger compartment requires heating, and the system's waste heat is sufficient to support passenger compartment heating. At this time, the organic Rankine loop operates, and the heat pump air conditioning system does not work. In this mode, the system's control logic is based on operating condition 15 and performs the following adjustments: (1) Power system and cooling circuit control The first electronic water pump 230 is shut down; the third ports of the eighth three-way valve 260 and the thirteenth-way valve 290 are shut down. The motor cooling circuit is disconnected from the organic Rankine cycle.

[0115] (2) Battery heating circuit control Control the second electronic water pump 320 to shut down.

[0116] (3) Crew cabin heating circuit control The third port of the fifteenth three-way valve 440 is closed to prevent the high-temperature coolant from entering the battery heating circuit, so that the high-temperature coolant only flows into the heater core 450.

[0117] Control of the eight-way valve 280: Connect the eighth port of the eight-way valve 280 to the fifth port, the fourth port to the first port, the seventh port to the first port, and the sixth port to the second port.

[0118] The control status of the remaining heat pump air conditioning circuit and engine / range extender cooling circuit remains consistent with that of operating condition 15.

[0119] As a preferred embodiment of the present invention, regarding the heat dissipation mode: Operating Condition 17: Integrated Interactive Heat Dissipation of Battery and Electric Drive System (Pure Electric Drive, ORC Non-operating Mode) like Figure 17 (Regarding Example 1) Figure 18 (Regarding Example 2) and Figure 19As shown, the system controls the second electronic water pump 320 to turn on; controls the first and second ports of the twelfth three-way valve 330 to open and the third port to close; controls the second and third ports of the thirteenth three-way valve 340 to open and the first port to close; controls the first and second ports of the second four-way valve 350 to connect and the third and fourth ports to connect; controls the second and third ports of the eleventh three-way valve 300 to open and the first port to close; controls the first electronic water pump 230 to turn on; controls all three ports of the seventh three-way valve 250 to open; controls the second and third ports of the eighth three-way valve 260 to open and the first port to close; controls the first and second ports of the ninth three-way valve 270 to open and the third port to close; controls the eighth port of the eight-way valve 280 to connect and the second port to open; controls the fourth electronic water pump 590 to turn on; controls the second and third ports of the eighteenth three-way valve 600 to open and the first port to close; and controls the fan to turn on.

[0120] Operating Condition 18: Engine / Range Extender Cooling Condition (Engine Driven, ORC Inactive Mode) like Figure 17 (Regarding Example 1) Figure 18 (Regarding Example 2) and Figure 19 As shown, the system controls the third electronic water pump 380 to turn on, controls the first and second ports of the eighth three-way valve 260 to open and the third port to close; controls the first and second ports of the ninth three-way valve 270 to open and the third port to close; controls the eighth port of the eight-way valve 280 to connect with the first port; controls the first and second ports of the thirteenth three-way valve 290 to open and the third port to close; controls the first and second ports of the fourteenth three-way valve 410 to open and the third port to close, so that all the high-temperature coolant is dissipated in the high-temperature radiator 420; and controls the fan to turn on.

[0121] Operating Condition 19: Battery and Electric Drive System Integration and Interaction with Engine / Range Extender Cooling (Hybrid Drive, ORC Inactive Mode) like Figure 17 (Regarding Example 1) Figure 18 (Regarding Example 2) and Figure 19As shown, the system controls the second electronic water pump 320 to turn on; controls the first and second ports of the twelfth three-way valve 330 to open and the third port to close; controls the second and third ports of the thirteenth three-way valve 340 to open and the first port to close; controls the first and second ports of the second four-way valve 350 to connect and the third and fourth ports to connect; controls the second and third ports of the eleventh three-way valve 300 to open and the first port to close; controls the first electronic water pump 230 to turn on; controls all three ports of the seventh three-way valve 250 to open; controls all three ports of the eighth three-way valve 260 to open; controls the first and second ports of the ninth three-way valve 270 to open and the third port to close; controls the eighth port of the eight-way valve 280 to connect and the second port to open; controls the fourth electronic water pump 590 to turn on; and controls the second and third ports of the eighteenth three-way valve 600 to open and the first port to close.

[0122] The system controls the third electronic water pump 380 to open, allowing coolant to enter the first port of the eighth three-way valve 260 and merge with the battery and electric drive system coolant; it controls the eighth port of the eight-way valve 280 to connect with the first port, where the eight-way valve 280 splits the flow into two paths: the battery and electric drive coolant flows into one path leading to the second port, and the engine / range extender coolant flows into one path leading to the first port; it controls the first and second ports of the thirteenth three-way valve 290 to open, and the third port to close; it controls the first and second ports of the fourteenth three-way valve 410 to open, and the third port to close, so that all the high-temperature coolant is cooled in the high-temperature radiator 420; and it controls the fan to turn on.

[0123] 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 within the protection scope of the present invention.

Claims

1. A system for the coordinated utilization of waste heat from new energy vehicles for power generation and thermal management, characterized in that, include: The organic Rankine cycle waste heat power generation circuit includes a high-temperature circuit section and a medium-temperature circuit section, which are used to recover waste heat of different grades and convert it into electrical energy. The heat pump air conditioning circuit is used to cool or heat the passenger compartment and the power battery pack, and has the function of waste heat recovery. The thermal management cycle circuit group includes the engine / range extender cooling circuit, the electric drive system cooling circuit, the passenger compartment heating circuit, and the battery cooling / heating circuit; The evaporator end of the organic Rankine cycle waste heat power generation circuit is connected to the engine / range extender cooling circuit and the electric drive system cooling circuit respectively through a heat exchanger. The system also includes a waste heat recovery interface unit. The medium-temperature circuit portion of the organic Rankine cycle waste heat power generation circuit is configured to thermally integrate with the heat pump air conditioning circuit through the waste heat recovery interface unit, or to be set up independently of the heat pump air conditioning circuit.

2. The new energy vehicle waste heat power generation and thermal management synergistic utilization system according to claim 1, characterized in that, The waste heat recovery interface unit is configured as either Scheme 1 or Scheme 2; wherein: Option 1: The waste heat recovery interface unit is a medium-temperature evaporator. The heat pump air conditioning circuit and the organic Rankine cycle waste heat power generation circuit are thermally integrated and interact through the medium-temperature evaporator. The medium-temperature evaporator is configured to serve as the waste heat recovery end of the heat pump air conditioning circuit or as the evaporation heat absorption end of the organic Rankine cycle waste heat power generation circuit in different modes. Option 2: The waste heat recovery interface unit is a waste heat recovery evaporator, which is configured to be connected to the heat pump air conditioning circuit to provide a heat source for the heat pump air conditioning circuit using the system's waste heat.

3. The new energy vehicle waste heat power generation and thermal management synergistic utilization system according to claim 2, characterized in that, The organic Rankine cycle waste heat power generation circuit includes a high-temperature circuit section and a medium-temperature circuit section; The high-temperature circuit section includes a high-temperature working fluid pump, a high-temperature evaporator, a high-temperature expander, and a high-temperature condenser connected in sequence. The intermediate temperature circuit includes an intermediate temperature working fluid pump, a regenerator, an intermediate temperature evaporator, an intermediate temperature expander, an intermediate temperature condenser, and a low temperature condenser.

4. The new energy vehicle waste heat power generation and thermal management synergistic utilization system according to claim 3, characterized in that, For Scheme 1, the medium-temperature circuit section also includes a sixteenth three-way valve, a first shut-off valve, a second shut-off valve, a third shut-off valve, and a seventeenth three-way valve; The outlet of the medium-temperature working fluid pump is selectively connected to either the regenerator or the bypass via the sixteenth three-way valve; the first outlet of the regenerator is connected to the second inlet of the high-temperature condenser and bypassed to the first shut-off valve; the second outlet of the high-temperature condenser is connected to the inlet of the medium-temperature evaporator after merging with the first shut-off valve via the second shut-off valve; the outlet of the medium-temperature evaporator is connected to the inlet of the medium-temperature expander and to the bypass via the third shut-off valve; the outlet of the medium-temperature condenser is selectively connected to either the medium-temperature working fluid pump or the low-temperature condenser via the seventeenth three-way valve.

5. The new energy vehicle waste heat power generation and thermal management synergistic utilization system according to claim 3, characterized in that, For Scheme 2, the medium-temperature circuit section also includes a first shut-off valve, a second shut-off valve, and a seventeenth three-way valve; The outlet of the medium-temperature working fluid pump is connected to the regenerator; the first outlet of the regenerator is connected to the second inlet of the high-temperature condenser and bypasses to the first shut-off valve; the second outlet of the high-temperature condenser is connected to the inlet of the medium-temperature evaporator after merging with the first shut-off valve via the second shut-off valve; the outlet of the medium-temperature evaporator is connected to the inlet of the medium-temperature expander.

6. The new energy vehicle waste heat power generation and thermal management synergistic utilization system according to claim 4 or 5, characterized in that, The heat pump air conditioning circuit includes: a compressor, a first four-way valve, an outdoor heat exchanger, a first three-way valve, a second three-way valve, a first electronic expansion valve, a second electronic expansion valve, a third three-way valve, an indoor evaporator, an indoor condenser, a battery cooler, a fourth three-way valve, a fifth three-way valve, a low-temperature condenser, a sixth three-way valve, a gas-liquid separator, a sixteenth three-way valve, a third shut-off valve, and a third electronic expansion valve; Specifically, the first, second, third, and fourth ports of the first four-way valve are respectively connected to the outlet of the compressor, the first port of the outdoor heat exchanger, the second port of the sixth three-way valve, and the second outlet of the low-temperature condenser; the first, second, and third ports of the first three-way valve are respectively connected to the second port of the outdoor heat exchanger, the third port of the second three-way valve, and the third port of the sixteenth three-way valve; the first and second ports of the second three-way valve are respectively connected to the first port of the first electronic expansion valve and the first port of the second electronic expansion valve; the first, second, and third ports of the third three-way valve are respectively connected to the compressor outlet, the first port of the outdoor heat exchanger, the third port of the second three-way valve, and the third port of the sixth three-way valve. The first, second, and third ports of the fourth three-way valve are respectively connected to the first port of the fifth three-way valve, the outlet of the indoor evaporator, and the inlet of the indoor condenser; the second and third ports of the fifth three-way valve are respectively connected to the first refrigerant port of the low-temperature condenser and the second refrigerant port of the battery cooler; the first and third ports of the sixth three-way valve are respectively connected to the outlet of the third electronic expansion valve and the inlet of the gas-liquid separator; the outlet of the gas-liquid separator is connected to the inlet of the compressor.

7. The new energy vehicle waste heat power generation and thermal management synergistic utilization system according to claim 6, characterized in that, The engine / range extender cooling circuit includes: a third electronic water pump, an engine / range extender, a thermostat, an eighth three-way valve, a ninth three-way valve, an eight-way valve, a thirteenth three-way valve, a fourteenth three-way valve, a high-temperature radiator, and an engine / range extender coolant reservoir. The cooling circuit of the electric drive system includes: a first electronic water pump, a drive motor, a motor controller, a DC converter, an inverter, a seventh three-way valve, an eighth three-way valve, a ninth three-way valve, an eighth-way valve, a thirteenth-way valve, an eleventh three-way valve, an electric drive coolant reservoir, a medium-temperature radiator, a fourth electronic water pump, an eighteenth three-way valve, and a second four-way valve. The crew cabin heating circuit includes: an eight-way valve, a fifteenth three-way valve, and a heater core; The battery cooling / heating circuit includes: a second electronic water pump, a twelfth three-way valve, a battery cooler, a thirteenth three-way valve, a second four-way valve, a battery pack liquid cooling plate, and a power battery pack; Specifically, the first to eighth ports of the eight-way valve are respectively connected to the second port of the thirteenth-way valve, the inlet of the medium-temperature radiator, the third port of the twelfth-way valve, the outlet of the heater core, the second port of the fifteenth-way valve, the coolant outlet of the medium-temperature condenser, the coolant outlet of the medium-temperature evaporator, and the first port of the ninth-way valve; the first to fourth ports of the second four-way valve are respectively connected to the inlet of the battery pack liquid cooling plate, the third port of the eighteenth-way valve, the third port of the eleventh-way valve, and the second port of the thirteenth-way valve; the first, second, and third ports of the seventh three-way valve are respectively connected to the third port of the eighth three-way valve, the outlet of the drive motor, and the outlet of the inverter; the first and second ports of the eighth three-way valve are respectively connected to the second port of the thermostat and the second port of the ninth three-way valve. Port connections: The third port of the ninth three-way valve is connected to the coolant inlet of the medium-temperature evaporator; the first port of the thirteenth three-way valve is connected to the inlet of the high-temperature radiator and the third port of the fourteenth three-way valve; the third port of the thirteenth three-way valve is connected to the first port of the eleventh three-way valve; the second port of the eleventh three-way valve is connected to the inlet of the first electronic water pump; the first and second ports of the twelfth three-way valve are respectively connected to the coolant inlet of the battery cooler and the second electronic water pump; the first and third ports of the thirteenth three-way valve are respectively connected to the third port of the fifteenth three-way valve and the coolant outlet of the battery cooler; the first port of the fifteenth three-way valve is connected to the inlet of the heater core; the first and second ports of the eighteenth three-way valve are respectively connected to the coolant inlet of the medium-temperature condenser and the outlet of the fourth electronic water pump.

8. A control method for a new energy vehicle waste heat power generation and thermal management synergistic utilization system, based on the new energy vehicle waste heat power generation and thermal management synergistic utilization system as described in claim 7, characterized in that, Includes the following steps: Step 1: Acquire vehicle thermal management requirements and environmental status signals; Step 2: Determine the system operation mode based on the signal. The operation mode includes at least the following: summer cooling and waste heat recovery power generation mode, spring and autumn waste heat recovery power generation mode, winter low temperature waste heat recovery mode, and deep low temperature waste heat recovery mode. Step 3: Based on the determined operating mode, switch the flow path and flow rate of refrigerant, coolant, and organic Rankine cycle working fluid to achieve different operating modes.

9. The control method for the new energy vehicle waste heat power generation and thermal management synergistic utilization system according to claim 8, characterized in that, When operating under summer conditions, the system enters a summer cooling and waste heat recovery power generation mode: the heat pump air conditioning circuit is controlled to operate in air conditioning cooling mode to cool the passenger compartment and power battery pack; simultaneously, the organic Rankine cycle waste heat power generation circuit is controlled to start generating electricity based on the working status of the waste heat source; in the heat pump air conditioning circuit: the four-way valve is controlled to switch to the cooling position, and the on / off states of the first three-way valve and the second three-way valve are adjusted to distribute the refrigerant flow to the indoor evaporator and battery cooler; in the organic Rankine cycle waste heat power generation circuit, the following hierarchical control logic is executed: When the engine / range extender is working, the high-temperature organic Rankine cycle and the medium-temperature organic Rankine cycle are simultaneously activated, the high-temperature working fluid pump and the medium-temperature working fluid pump are operated, and the first shut-off valve is closed and the second shut-off valve is opened, so that the high-temperature stage waste heat and the medium-temperature stage waste heat can generate electricity together; when only the electric drive system is working, only the medium-temperature organic Rankine cycle is activated, the medium-temperature working fluid pump is operated and the high-temperature working fluid pump is closed, and the first shut-off valve is opened and the second shut-off valve is closed, so that the waste heat of the electric drive system can generate electricity independently. In the summer cooling and waste heat recovery power generation mode, the control logic of each cooling circuit is as follows: When the electric drive system is working, the first electronic water pump is turned on, and the port connection status of the seventh three-way valve, the eighth three-way valve, the ninth three-way valve, and the eight-way valve is adjusted to make the cooling circuit of the electric drive system closed loop and exchange heat with the organic Rankine cycle waste heat power generation circuit; when the engine / range extender is working, the third electronic water pump is turned on, and the port connection status of the eighth three-way valve, the ninth three-way valve, the thirteenth three-way valve, the fourteenth three-way valve, and the eight-way valve is adjusted to make the cooling circuit of the engine / range extender closed loop and exchange heat with the organic Rankine cycle waste heat power generation circuit; when the power battery pack is working, the second electronic water pump is turned on, and the port connection status of the twelfth three-way valve, the thirteenth three-way valve, and the second four-way valve is adjusted to make the coolant flow through the battery cooler for cooling.

10. The control method for the new energy vehicle waste heat power generation and thermal management synergistic utilization system according to claim 8, characterized in that, When in the spring and autumn waste heat recovery power generation mode: the heat pump air conditioning circuit is turned on or off according to the heat dissipation load of the power battery pack, and the passenger compartment blower is turned off; at the same time, the organic Rankine cycle waste heat power generation circuit is turned on to recover the waste heat of the electric drive system and engine / range extender for power generation. The control logic of the heat pump air conditioning circuit and the battery cooling circuit is as follows: When the heat dissipation load of the power battery pack is lower than the preset value, the heat pump air conditioning circuit is controlled to close; the second and third ports of the twelfth three-way valve are connected, the second and third ports of the eight-way valve are connected, and the first and second ports of the second four-way valve are connected, so that the coolant of the power battery pack is connected to the circuit where the medium-temperature radiator is located for heat dissipation; when the heat dissipation load of the power battery pack is higher than the preset value, the heat pump air conditioning circuit is controlled to turn on for cooling, and the expansion valve and the three-way valve are adjusted so that the refrigerant flows only through the battery cooler to cool the power battery pack, and the passenger compartment blower is kept off; the control logic of the organic Rankine cycle waste heat power generation circuit is as follows: the graded control logic consistent with the summer operating conditions is executed: when the engine / range extender is working, the high-temperature and medium-temperature organic Rankine cycles are controlled to open simultaneously, and the first shut-off valve is controlled to close and the second shut-off valve is controlled to open; when only the electric drive system is working, only the medium-temperature organic Rankine cycle is controlled to open, and the first shut-off valve is controlled to open and the second shut-off valve is controlled to close.

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