New energy hybrid electric vehicle thermal management system and method based on double-medium cold plate

Abstract

The invention is suitable for the technical field of new energy hybrid electric vehicles, and provides a new energy hybrid electric vehicle thermal management system and method based on a double-medium cold plate, the system comprises a heat pump air conditioner loop, an engine / range extender cooling loop, an electric drive system cooling loop, a passenger compartment heating loop and a battery cooling / heating loop; a double-medium cold plate in the heat pump air conditioner loop is provided with a refrigerant flow channel and a cooling liquid flow channel which are independent of each other and can conduct heat exchange. A refrigerant flow channel of the double-medium cold plate is connected into the heat pump air conditioner loop, a cooling liquid flow channel of the double-medium cold plate is connected into the battery cooling / heating loop, and the double-medium cold plate is used for thermal coupling of the heat pump air conditioner loop and the battery cooling / heating loop. The double-medium cold plate is used for replacing a traditional heat exchange component, the system integration degree and the energy utilization efficiency are improved, and the temperature range adaptability is high.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of new energy hybrid electric vehicles, and particularly relates to a new energy hybrid electric vehicle thermal management system and method based on a double-medium cold plate. BACKGROUND

[0002] The thermal management system of a hybrid electric vehicle mainly includes battery thermal management, passenger cabin air conditioning, and powertrain cooling. With the development of technology, the heat pump air conditioning system gradually replaces the traditional PTC heating mode due to its high efficiency and energy saving characteristics. At the same time, in order to improve the winter endurance, using the waste heat of the engine and electric drive system is also the industry trend.

[0003] However, the existing heat pump thermal management system still has the following problems in actual application: (1) System complexity, component redundancy: In order to realize the heat exchange between the battery circuit and the heat pump circuit, the existing technology usually needs to set up an independent plate heat exchanger (Chiller) or an intermediate heat exchange component. This not only increases the volume and weight of the system, but also leads to complex pipe connection, increases the flow resistance and leakage risk.

[0004] (2) Poor low-temperature adaptability: In extremely cold environments, the heating efficiency of conventional air source heat pumps decreases sharply, and the dispersed waste heat (such as electric drive, battery waste heat) is difficult to utilize efficiently, resulting in high energy consumption in winter.

[0005] (3) Mode switching is rigid: The existing flow path switching usually relies on a large number of dispersed valves, and the control logic is complex, making it difficult to achieve the optimal energy efficiency ratio under different environmental temperatures.

[0006] Therefore, how to cancel the intermediate heat exchange link, design a thermal management system that can directly couple refrigerant and coolant, simplify the system architecture, and efficiently utilize multiple heat sources (including low-temperature waste heat utilization), is a technical problem that needs to be solved at present. SUMMARY

[0007] The purpose of the embodiments of the present application is to provide a new energy hybrid electric vehicle thermal management system and method based on a double-medium cold plate, which aims to solve the problems raised in the background art.

[0008] The embodiment of the present application is implemented based on a new energy hybrid vehicle thermal management system of a double-medium cold plate, comprising a heat pump air conditioning circuit, an engine / range extender cooling circuit, an electric drive system cooling circuit, a passenger cabin heating circuit, and a battery cooling / heating circuit; the double-medium cold plate in the heat pump air conditioning circuit and the battery cooling / heating circuit has refrigerant flow channels and cooling liquid flow channels which are independent of each other and can exchange heat; the refrigerant flow channels of the double-medium cold plate are connected to the heat pump air conditioning circuit, the cooling liquid flow channels of the double-medium cold plate are connected to the battery cooling / heating circuit, and the double-medium cold plate is used for thermal coupling of the heat pump air conditioning circuit and the battery cooling / heating circuit.

[0009] Further technical solutions, the heat pump air conditioning circuit comprises a double-medium cold plate, a compressor, an outdoor heat exchanger, an indoor condenser, an indoor evaporator and a liquid storage tank; one end of the compressor is connected with the liquid storage tank, the other end is connected with a first port of a four-way valve, a second port of the four-way valve is connected with the outdoor heat exchanger, a third port of the four-way valve is connected with the liquid storage tank, and a fourth port of the four-way valve is connected with a second port of an eleventh three-way valve; a first port of the eleventh three-way valve is connected with a first port of a thirteenth three-way valve, a second port and a third port of the thirteenth three-way valve are connected with the indoor evaporator and the indoor condenser respectively; the liquid storage tank is also connected with a second port of a twelfth three-way valve, a first port of the twelfth three-way valve is connected with a third port of the eleventh three-way valve; the other end of the outdoor heat exchanger is connected with a third port of an eighth three-way valve, a first port of the eighth three-way valve is connected with a first port of a ninth three-way valve through a first electronic expansion valve, a second port and a third port of the ninth three-way valve are connected with the indoor condenser and the indoor evaporator respectively; a second port of the eighth three-way valve is connected with a refrigerant first port of the double-medium cold plate through a second electronic expansion valve, a refrigerant second port of the double-medium cold plate is connected with a third port of the twelfth three-way valve; The engine / range extender cooling circuit comprises an engine / range extender, a thermostat, a high-temperature radiator, a first expansion water tank and a first electronic water pump; the engine / range extender is connected with a first port of the thermostat; the engine / range extender is also connected with the first electronic water pump, the first electronic water pump is connected with the first expansion water tank, the first expansion water tank is also connected with a third port of the thermostat, the first expansion water tank is also connected with the high-temperature radiator, and the high-temperature radiator is also connected with a first port of a first three-way valve; a second port of the thermostat is connected with a first port of a five-way valve, and a fifth port of the five-way valve is connected with a third port of the first three-way valve; The electric drive system cooling circuit comprises a fourth electronic water pump, a drive motor, a motor controller, a low-temperature radiator and a second expansion water tank; the second expansion water tank is connected with the fourth electronic water pump and the low-temperature radiator; the second port of the first three-way valve is connected to the pipeline between the low-temperature radiator and the second expansion water tank through a second one-way valve; the fourth electronic water pump is connected with the drive motor and the motor controller; the drive motor and the motor controller are connected with the second port and the third port of a sixth three-way valve respectively; the first port of the sixth three-way valve is connected with the third port of a seventh three-way valve; the first port of the seventh three-way valve is connected with the low-temperature radiator; the second port of the seventh three-way valve is connected with the second port of a five-way valve. The passenger cabin heating circuit comprises a second electronic water pump and a heater core; one end of the second electronic water pump is connected with the fourth port of the five-way valve, and the other end is connected with the second port of a second three-way valve; the first port of the second three-way valve is connected with one end of the heater core; the third port of the second three-way valve is connected with the first port of the cooling liquid of a double-medium cold plate; the other end of the heater core is connected with the second port of a third three-way valve; the first port of the third three-way valve is connected with the third port of the five-way valve. The battery cooling / heating circuit comprises a third electronic water pump and a power battery pack; one end of the third electronic water pump is connected with the second port of the cooling liquid of the double-medium cold plate, and the other end is connected with the second port of a fourth three-way valve; the first port of the fourth three-way valve is connected with the third port of the third three-way valve; the third port of the fourth three-way valve is connected with the second port of a fifth three-way valve; the first port of the fifth three-way valve is connected with the second port of the five-way valve; the third port of the fifth three-way valve is connected with a first one-way valve; the other end of the first one-way valve is connected to the pipeline between the seventh three-way valve and the low-temperature radiator.

[0010] In a further technical solution, the thermal management system further comprises a radiator assembly and a passenger cabin assembly. The outdoor heat exchanger, the low-temperature radiator, the high-temperature radiator and the fan are integrated in the radiator assembly; the fan exchanges heat with the outdoor heat exchanger, the low-temperature radiator and the high-temperature radiator by means of turbulent air. The heater core, the indoor condenser, the indoor evaporator and the air blower are integrated in the passenger cabin; the air blower exchanges heat with the heater core, the indoor condenser and the indoor evaporator by means of turbulent air, and provides cold air or warm air to the passenger cabin.

[0011] In a further technical solution, the double-medium cold plate comprises staggered refrigerant flow channels and cooling liquid flow channels; the first port and the second port of the refrigerant are arranged on the refrigerant flow channels; the first port and the second port of the cooling liquid are arranged on the cooling liquid flow channels.

[0012] Another purpose of the embodiment of the present application is to provide a new energy hybrid vehicle thermal management method based on a double-medium cold plate, based on the thermal management system, comprising the following steps: Step 1: Obtain the thermal management demand signal and the ambient temperature signal of the vehicle; Step 2: According to the thermal management demand signal and the ambient temperature signal, control the on-off state of the four-way valve, the five-way valve and each three-way valve, and the running state of the compressor and each electronic water pump, and switch between the high-temperature refrigeration mode, the non-high-temperature mode, the low-temperature waste heat recovery mode, the deep low-temperature waste heat recovery mode and the battery cooling mode.

[0013] Further technical solutions, when in a high-temperature environment, switch to the high-temperature refrigeration mode: control the heat pump air conditioning circuit to be in a refrigeration mode, control the double-medium cold plate to work only in a refrigerant flow channel, and cool the battery and the passenger cabin through the heat pump air conditioning circuit; simultaneously control the electric drive system cooling circuit and the engine / range extender cooling circuit to independently operate heat dissipation.

[0014] Further technical solutions, in the high-temperature refrigeration mode: control the air blower to be turned on, control the first port and the second port of the four-way valve to be connected, and the third port and the fourth port to be connected; distribute the refrigerant to the indoor evaporator and the double-medium cold plate through the eighth three-way valve; control the fan to be turned on; when the electric drive system works, control the fourth electronic water pump to be turned on, and the first port and the third port of the seventh three-way valve to be turned on; when the engine / range extender works, control the first electronic water pump to be turned on, and the first port and the third port of the first three-way valve to be turned on.

[0015] Further technical solutions, when in a non-high-temperature environment, switch to the non-high-temperature mode and adjust according to the load state: when the load is not large, control the heat pump air conditioning circuit to be inoperative, and the double-medium cold plate to work only in a cooling liquid flow channel, and cool the battery through the low-temperature radiator by using the cooling liquid; when the load is large, control the heat pump air conditioning circuit to be switched to a refrigeration mode, and the double-medium cold plate to work only in a refrigerant flow channel, and cool the battery through the heat pump air conditioning circuit.

[0016] Further technical solutions, in the large load state of the non-high-temperature mode: control the compressor to be turned on, control the first port and the second port of the four-way valve to be connected, and the third port and the fourth port to be connected; control the air blower to be turned off, control the second port and the third port of the eighth three-way valve to be turned on, and the second port to be turned off, and only supply liquid to the double-medium cold plate; in the non-large load state of the non-high-temperature mode: control the third electronic water pump to be turned on, control the second port and the third port of the fourth three-way valve and the fifth three-way valve to be turned on, and control the stop valve to be turned on.

[0017] Further technical solutions, when in a low-temperature environment, switch to the low-temperature waste heat recovery mode: the control system recovers the waste heat of the battery, the electric drive system and the engine / range extender, and heats the passenger compartment through the heater core; if the amount of waste heat is insufficient, the control system controls the heat pump air conditioning circuit to open the heat pump mode as a supplementary heat source.

[0018] Further technical solutions, in the low-temperature waste heat recovery mode: when the electric drive system is working, the fourth electronic water pump is controlled; when the engine / range extender is working, the first electronic water pump is controlled to be opened, part of the high-temperature coolant is made to enter the five-way valve through the seventh three-way valve and the first three-way valve, and the first port and the fourth port of the five-way valve are connected and the third port and the fifth port are connected, so that the high-temperature coolant enters the second three-way valve and the flow of the high-temperature coolant is distributed to the heater core and the dual-medium cold plate through the second three-way valve; when the heat pump mode is opened as a supplementary heat source, the compressor is controlled to be opened, the first port and the fourth port of the four-way valve are connected and the second port and the third port are connected, the third port of the second three-way valve is controlled to be closed, the coolant is prevented from entering the dual-medium cold plate, and the flow of the refrigerant is distributed to the indoor condenser and the dual-medium cold plate through the eleventh three-way valve.

[0019] Further technical solutions, when in a deep low-temperature environment and the air source heat pump cannot normally operate, switch to the deep low-temperature waste heat recovery mode: recover the waste heat of the electric drive system and the engine / range extender, and heat the passenger compartment and the battery through the heater core and the dual-medium cold plate; if the amount of waste heat is insufficient, control the motor to enter a locked-rotor heat generation state to supply the generated heat to the dual-medium cold plate as an evaporation heat source to start the heat pump cycle.

[0020] Further technical solutions, in the deep low-temperature waste heat recovery mode: control the heat pump air conditioning circuit to absorb the waste heat of the electric drive system and the engine / range extender, the first port and the fourth port of the four-way valve are connected and the second port and the third port are connected; control the first electronic expansion valve to be fully opened and control the second electronic expansion valve to be throttling expanded, so that the low-temperature refrigerant absorbs heat and evaporates in the dual-medium cold plate; control the five-way valve and each three-way valve to introduce the coolant of the electric drive system and the engine / range extender into the coolant flow channel of the dual-medium cold plate.

[0021] Further technical solutions, when the power battery pack is in a high-rate fast-charging state, switch to the battery cooling mode: if the power battery pack has a small heat dissipation demand and the ambient temperature is not high, control the coolant flow channel of the dual-medium cold plate to be opened and dissipate heat through the low-temperature radiator; if the power battery pack has a large heat dissipation demand or the ambient temperature is high, control the refrigerant flow channel of the dual-medium cold plate to be opened and start the heat pump air conditioning circuit to perform refrigeration.

[0022] Further technical solutions, in the battery cooling mode of the heat pump air conditioner refrigeration state: control the compressor to open, control the four-way valve inside the first port and the second port are connected, control the eighth three-way valve second port and third port open, control the twelfth three-way valve second port and third port open; in the battery cooling mode of the low temperature radiator refrigeration state: control the third electronic water pump to open, control the fourth three-way valve, the second port and the third port of the fifth three-way valve open, control the stop valve to open.

[0023] The new energy hybrid electric vehicle thermal management system and method based on the double medium cold plate provided by the embodiment of the application have the following beneficial effects: (1) High integration: the heat coupling of the heat pump refrigerant circuit and the battery cooling liquid circuit is directly realized through the double medium cold plate, the independent plate heat exchanger in the traditional system is cancelled, the system architecture is simplified, and the number of parts and the number of pipeline connection points are reduced.

[0024] (2) Energy saving and high efficiency: the system can flexibly recover the waste heat of the engine / range extender and the electric drive system, and through the cooperation of the five-way valve and multiple three-way valves, the waste heat is utilized in the passenger compartment heating, battery heating and heat pump low temperature heat source, which significantly reduces the energy consumption of the whole vehicle.

[0025] (3) Strong temperature domain adaptability: in a deep low temperature environment, the system can utilize the heat generated by the motor at the locked rotor and cooperate with the double medium cold plate as an evaporator, effectively solving the problem that the traditional air source heat pump cannot work in extremely cold conditions, and widening the low temperature working range of the system. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The structure schematic diagram of the new energy hybrid electric vehicle thermal management system based on the double medium cold plate provided by the embodiment of the application is shown in the figure; Figure 2 The structure schematic diagram of the double medium cold plate is shown in the figure; Figure 3 The working principle schematic diagram of the thermal management system in the high temperature refrigeration mode (I) is shown in the figure; Figure 4 The working principle schematic diagram of the thermal management system in the high temperature refrigeration mode (II) is shown in the figure; Figure 5 The working principle schematic diagram of the thermal management system in the non-high temperature mode (I) is shown in the figure; Figure 6 The working principle schematic diagram of the thermal management system in the non-high temperature mode (II) is shown in the figure; Figure 7 The working principle schematic diagram of the thermal management system in the non-high temperature mode (III) is shown in the figure; Figure 8 The working principle schematic diagram of the thermal management system in the low temperature waste heat recovery mode (I) is shown in the figure; Figure 9 Fig. 2 is a schematic diagram of the working principle of the thermal management system in the low-temperature waste heat recovery mode (two); Figure 10 Fig. 3 is a schematic diagram of the working principle of the thermal management system in the low-temperature waste heat recovery mode (three); Figure 11 Fig. 4 is a schematic diagram of the working principle of the thermal management system in the deep low-temperature waste heat recovery mode (one); Figure 12 Fig. 5 is a schematic diagram of the working principle of the thermal management system in the deep low-temperature waste heat recovery mode (two); Figure 13 Fig. 6 is a schematic diagram of the working principle of the thermal management system in the deep low-temperature waste heat recovery mode (three); Figure 14 Fig. 7 is a schematic diagram of the communication state of the five-way valve in the high-temperature refrigeration / non-high-temperature mode and the low-temperature / deep low-temperature waste heat recovery mode.

[0027] In the drawings: 1 - first port of refrigerant; 2 - first port of coolant; 3 - second port of refrigerant; 4 - second port of coolant; 5 - refrigerant flow channel; 6 - coolant flow channel; 10 - engine / range extender; 20 - thermostat (i - first port, ii - second port, iii - third port); 30 - five-way valve (① - first port, ② - second port, ③ - third port, ④ - fourth port, ⑤ - fifth port); 40 - first three-way valve; 50 - high-temperature radiator; 60 - fan; 70 - first expansion water tank; 80 - first electronic water pump; 90 - second electronic water pump; 100 - second three-way valve; 110 - heater core; 120 - blower; 130 - third three-way valve; 140 - third electronic water pump; 150 - fourth three-way valve; 160 - fifth three-way valve; 170 - first check valve; 180 - low-temperature radiator; 190 - second check valve; 200 - second expansion water tank; 210 - fourth electronic water pump; 221 - drive motor; 222 - motor controller; 230 - sixth three-way valve; 240 - seventh three-way valve; 250 - stop valve; 260 - dual-medium cold plate; 270 - compressor; 280 - four-way valve (I - first port, II - second port, III - third port, IV - fourth port); 290 - outdoor heat exchanger; 300 - eighth three-way valve; 311 - first electronic expansion valve; 312 - second electronic expansion valve; 320 - ninth three-way valve; 331 - indoor condenser; 332 - indoor evaporator; 340 - thirteenth three-way valve; 350 - eleventh three-way valve; 360 - twelfth three-way valve; 370 - liquid storage tank; 380 - power battery pack; 400 - radiator assembly; 500 - passenger cabin. (Note: the ports of each three-way valve in the figure are uniformly defined as: a - first port, b - second port, c - third port). DETAILED DESCRIPTION

[0028] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0029] The specific implementation of the present application will be described in detail below in combination with specific embodiments.

[0030] As shown in Figure 1 and Figure 2 , a new energy hybrid electric vehicle thermal management system based on a dual-medium cold plate is provided for an embodiment of the present application, which includes a heat pump air conditioning circuit and an engine / range extender cooling circuit, an electric drive system cooling circuit, a passenger cabin heating circuit and a battery cooling / heating circuit. The heat pump air conditioning circuit includes a dual-medium cold plate 260, a compressor 270, an outdoor heat exchanger 290, an indoor condenser 331, an indoor evaporator 332 and a liquid storage tank 370. One end of the compressor 270 is connected with the liquid storage tank 370, and the other end is connected with a first port of a four-way valve 280. A second port of the four-way valve 280 is connected with the outdoor heat exchanger 290. A third port of the four-way valve 280 is connected with the liquid storage tank 370. A fourth port of the four-way valve 280 is connected with a second port of an eleventh three-way valve 350. A first port of the eleventh three-way valve 350 is connected with a first port of a thirteenth three-way valve 340. A second port and a third port of the thirteenth three-way valve 340 are connected with the indoor evaporator 332 and the indoor condenser 331, respectively. The liquid storage tank 370 is also connected with a second port of a twelfth three-way valve 360. A first port of the twelfth three-way valve 360 is connected with a third port of the eleventh three-way valve 350. The other end of the outdoor heat exchanger 290 is connected with a third port of an eighth three-way valve 300. A first port of the eighth three-way valve 300 is connected with a first port of a ninth three-way valve 320 through a first electronic expansion valve 311. A second port and a third port of the ninth three-way valve 320 are connected with the indoor condenser 331 and the indoor evaporator 332, respectively. A second port of the eighth three-way valve 300 is connected with a first port of a refrigerant through a second electronic expansion valve 312. A second port of the refrigerant is connected with a third port of the twelfth three-way valve 360. The engine / range cooler cooling circuit comprises an engine / range cooler 10, a thermostat 20, a high-temperature radiator 50, a first expansion tank 70 and a first electronic water pump 80; the engine / range cooler 10 is connected with a first port of the thermostat 20; the engine / range cooler 10 is further connected with the first electronic water pump 80, the first electronic water pump 80 is connected with the first expansion tank 70, and the first expansion tank 70 is further connected with a third port of the thermostat 20, the first expansion tank 70 is further connected with the high-temperature radiator 50, and the high-temperature radiator 50 is further connected with a first port of a first three-way valve 40; a second port of the thermostat 20 is connected with a first port of a five-way valve 30, and a fifth port of the five-way valve 30 is connected with a third port of the first three-way valve 40; The electric drive system cooling circuit comprises a fourth electronic water pump 210, a drive motor 221, a motor controller 222, a low-temperature radiator 180 and a second expansion tank 200; the second expansion tank 200 is connected with the fourth electronic water pump 210 and the low-temperature radiator 180 at the same time, and a second port of the first three-way valve 40 is connected with a pipeline between the low-temperature radiator 180 and the second expansion tank 200 through a second check valve 190; the fourth electronic water pump 210 is connected with the drive motor 221 and the motor controller 222 at the same time, the drive motor 221 and the motor controller 222 are connected with a second port and a third port of a sixth three-way valve 230 respectively, a first port of the sixth three-way valve 230 is connected with a third port of a seventh three-way valve 240, a first port of the seventh three-way valve 240 is connected with the low-temperature radiator 180, and a second port of the seventh three-way valve 240 is connected with a second port of the five-way valve 30; The passenger cabin heating circuit comprises a second electronic water pump 90 and a heater core 110; one end of the second electronic water pump 90 is connected with a fourth port of the five-way valve 30, and the other end is connected with a second port of a second three-way valve 100; a first port of the second three-way valve 100 is connected with one end of the heater core 110, and a third port of the second three-way valve 100 is connected with a first port 2 of a cooling liquid of a double-medium cold plate 260; the other end of the heater core 110 is connected with a second port of a third three-way valve 130, and a first port of the third three-way valve 130 is connected with a third port of the five-way valve 30; The battery cooling / heating circuit comprises a third electronic water pump 140 and a power battery pack 380; one end of the third electronic water pump 140 is connected with the second port 4 of the double-medium cold plate 260, and the other end is connected with the second port of the fourth three-way valve 150; the first port of the fourth three-way valve 150 is connected with the third port of the third three-way valve 130; the third port of the fourth three-way valve 150 is connected with the second port of the fifth three-way valve 160; the first port of the fifth three-way valve 160 is connected with the second port of the five-way valve 30; the third port of the fifth three-way valve 160 is connected with the first one-way valve 170; the other end of the first one-way valve 170 is connected with the pipeline between the seventh three-way valve 240 and the low-temperature radiator 180.

[0031] The connection of the five-way valve in the engine / range extender cooling circuit, the electric drive system cooling circuit, the passenger cabin heating circuit and the battery cooling / heating circuit under each working condition is as shown in Figure 14

[0032] In the embodiment of the present application, the communication between different circuits is controlled by controlling the four-way valve 280, the five-way valve 30 and the three-way valves, so as to realize the heat dissipation of the electric drive system and the engine / range extender and the heating / cooling of the passenger cabin and the battery without additional heating and heat exchange components. It should be noted that the electric drive system comprises a drive motor 221 and a motor controller 222; the radiator assembly 400 comprises an outdoor heat exchanger 290, a low-temperature radiator 180, a high-temperature radiator 50 and a fan 60; the passenger cabin 500 comprises a heating core 110, an indoor condenser 331, an indoor evaporator 332 and a blower 120.

[0033] As shown in Figure 1 , as a preferred embodiment of the present application, the thermal management system further comprises a radiator assembly 400 and a passenger cabin 500 assembly; The outdoor heat exchanger 290, the low-temperature radiator 180, the high-temperature radiator 50 and the fan 60 are integrated in the radiator assembly 400, and the fan 60 exchanges heat with the outdoor heat exchanger 290, the low-temperature radiator 180 and the high-temperature radiator 50 by disturbing air flow; The heating core 110, the indoor condenser 331, the indoor evaporator 332 and the blower 120 are integrated in the passenger cabin 500, and the blower 120 exchanges heat with the heating core 110, the indoor condenser 331 and the indoor evaporator 332 by disturbing air flow, and provides cold air or warm air to the passenger cabin 500.

[0034] As shown in Figure 2 ​As shown, in a preferred embodiment of the present invention, the dual-medium cold plate 260 includes refrigerant channels 5 and coolant channels 6 arranged in an alternating manner. The first refrigerant port 1 and the second refrigerant port 3 are both disposed on the refrigerant channels 5, and the first coolant port 2 and the second coolant port 4 are both disposed on the coolant channels 6.

[0035] Another embodiment of the present invention provides a thermal management method for new energy hybrid vehicles based on a dual-medium cold plate, which, based on the above-mentioned thermal management system, includes the following steps: Step 1: Acquire the vehicle's thermal management requirements signal and ambient temperature signal; Step 2: Based on the thermal management demand signal and the ambient temperature signal, control the on / off state of the four-way valve 280, the five-way valve 30 and each three-way valve, as well as the operating state of the compressor 270 and each electronic water pump, and switch between high-temperature cooling mode, non-high-temperature mode, low-temperature waste heat recovery mode, deep low-temperature waste heat recovery mode and battery cooling mode.

[0036] In a preferred embodiment of the present invention, under high-temperature cooling mode: Operating Condition 1: When the vehicle is at high temperature, under high load / low load, in hybrid drive mode, the passenger compartment is cooled, the battery-coupled air conditioning is cooled, the electric drive is cooled, the engine / range extender is cooled, and the air conditioning is working.

[0037] refer to Figure 3 and Figure 14 The system controls the compressor 270 to start, connects the first and second ports of the four-way valve 280, connects the third and fourth ports of the four-way valve 280, controls the three ports of the eighth three-way valve 300 to be open, and controls the first electronic expansion valve 311 and the second electronic expansion valve 312 to be in working condition. It also controls the first and third ports of the ninth three-way valve 320 to be connected, the second port to be closed, and controls the blower 120 to start. The system controls the first and second ports of the thirteenth-way valve 340 to be connected, and the third port to be closed; it controls the three ports of the eleventh-way valve 350 to be open; it controls the first and third ports of the twelfth-way valve 360 ​​to be connected, and the second port to be closed; it controls the first electronic water pump 80 to be turned on; it controls the first and fifth ports of the five-way valve 30 to be connected; it controls the first and third ports of the first three-way valve 40 to be connected, and the second port to be closed; it controls the fan 60 to be turned on; it controls the fourth electronic water pump 210 to be turned on; it controls the three ports of the sixth three-way valve 230 to be open; it controls the first and third ports of the seventh three-way valve 240 to be connected, and the second port to be closed; all other components are in a closed or shut-off state.

[0038] Condition two: high temperature, driving condition, large load / non-large load, pure electric mode, passenger cabin cooling, battery coupled air conditioning cooling, electric drive cooling, engine / range extender not working, air conditioning working.

[0039] The thermal management system is in the same state as condition one.

[0040] Condition three: high temperature, driving condition, large load / non-large load, range extender mode, passenger cabin cooling, battery coupled air conditioning cooling, electric drive cooling, engine / range extender cooling, air conditioning working.

[0041] The thermal management system is in the same state as condition one.

[0042] Condition four: high temperature, driving condition, large load / non-large load, engine / range extender direct drive mode, passenger cabin cooling, battery not working, electric drive cooling, engine / range extender cooling, air conditioning working.

[0043] On the basis of condition one, the first port and the third port of the eighth three-way valve 300 are connected, the second port is closed, the second electronic expansion valve 312 is controlled to be in a non-working state, the first port and the second port of the eleventh three-way valve 350 are opened, the third port is closed, and the three ports of the twelfth three-way valve 360 are controlled to be in a closed state.

[0044] Condition five: high temperature, driving condition, large load / non-large load, engine direct drive mode, passenger cabin cooling, battery not working, electric drive not working, engine cooling, air conditioning working.

[0045] On the basis of condition one, the first port and the third port of the eighth three-way valve 300 are connected, the second port is closed, the second electronic expansion valve 312 is controlled to be in a non-working state, the first port and the second port of the eleventh three-way valve 350 are opened, the third port is closed, the three ports of the twelfth three-way valve 360 are controlled to be in a closed state, and the fourth electronic water pump 210 is controlled to be closed, i.e., the electric drive system cooling circuit is in a non-working state.

[0046] Condition six: high temperature, parking condition, passenger cabin cooling, battery idling charging and coupled air conditioning cooling, electric drive not working, engine / range extender working, air conditioning working.

[0047] Reference Figure 4 With Figure 14, the compressor 270 is controlled to be turned on, the first port and the second port of the four-way valve 280 are controlled to be connected, the third port and the fourth port of the four-way valve 280 are controlled to be connected, the three ports of the eighth three-way valve 300 are controlled to be in an open state, the first electronic expansion valve 311 and the second electronic expansion valve 312 are controlled to be in a working state, the first port and the third port of the ninth three-way valve 320 are controlled to be connected, the second port is closed, the blower 120 is controlled to be turned on, the first port and the second port of the thirteenth three-way valve 340 are controlled to be connected, the third port is closed, the three ports of the eleventh three-way valve 350 are controlled to be in an open state, the first port and the third port of the twelfth three-way valve 360 are controlled to be connected, the second port is closed; the first electronic water pump 80 is controlled to be turned on, the first port and the fifth port of the five-way valve 30 are controlled to be connected, the first port and the third port of the first three-way valve 40 are controlled to be connected, the second port is closed, the fan 60 is controlled to be turned on; the remaining components are in a non-open or closed state.

[0048] Working condition seven: high temperature, parking condition, passenger cabin cooling, battery not working, electric drive not working, engine / range extender not working, air conditioner working.

[0049] Reference Figure 4 On the basis of working condition six, the first port and the third port of the eighth three-way valve 300 are controlled to be connected, the second port is closed, the second electronic expansion valve 312 is controlled to be in a non-working state, the first port and the second port of the eleventh three-way valve 350 are controlled to be open, the third port is closed, the three ports of the twelfth three-way valve 360 are controlled to be in a closed state, and the first electronic water pump 80 is controlled to be closed, that is, the engine / range extender cooling circuit is in a non-working state.

[0050] Working condition eight: high temperature, parking condition, passenger cabin not cooling, battery charging and coupling air conditioner cooling, electric drive not working, engine / range extender not working, air conditioner working.

[0051] Reference Figure 4 On the basis of working condition six, the second port and the third port of the eighth three-way valve 300 are controlled to be connected, the first port is closed, the first electronic expansion valve 311 is controlled to be in a non-working state, the blower 120 is controlled to be closed, the second port and the third port of the eleventh three-way valve 350 are controlled to be connected, the first port is closed, and the first electronic water pump 80 is controlled to be closed, that is, the engine / range extender cooling circuit is in a non-working state.

[0052] As a preferred embodiment of the present application, in a non-high temperature mode: Working condition nine: non-high temperature, driving condition, non-heavy load, range extension mode, passenger cabin not cooling, battery liquid cooling, electric drive cooling, engine / range extender cooling, air conditioner not working.

[0053] Reference Figure 5 And Figure 14, the compressor 270 is controlled to be in the off state, i.e., the heat pump air conditioning circuit is in the non-working state; the first electronic water pump 80 is controlled to be turned on, the first port of the five-way valve 30 is controlled to be connected with the fifth port, the first port of the first three-way valve 40 is controlled to be connected with the third port, the second port is closed, the fan 60 is controlled to be turned on, the third electronic water pump 140 is controlled to be turned on, the second port of the fourth three-way valve 150 is controlled to be connected with the third port, the first port is closed, the second port of the fifth three-way valve 160 is controlled to be connected with the third port, the first port is closed, the stop valve 250 is controlled to be in the non-stop state, the fourth electronic water pump 210 is controlled to be turned on, the three ports of the sixth three-way valve 230 are controlled to be in the open state, the first port of the seventh three-way valve 240 is controlled to be connected with the third port, and the second port is closed; the remaining components are in the non-open or closed state.

[0054] Working condition ten: non-high temperature, driving condition, non-heavy load, pure electric mode, passenger compartment not cooled, battery liquid cooled, electric drive cooled, engine / range extender not working, air conditioner not working.

[0055] Reference Figure 5 On the basis of working condition nine, the first electronic water pump 80 is controlled to be closed, i.e., the engine / range extender cooling circuit is in the non-working state.

[0056] Working condition eleven: non-high temperature, driving condition, non-heavy load, engine / range extender direct drive mode, passenger compartment not cooled, battery not working, electric drive cooled, engine / range extender cooled, air conditioner not working.

[0057] Reference Figure 5 On the basis of working condition nine, the third electronic water pump 140 is controlled to be closed, and the stop valve 250 is controlled to be in the closed state.

[0058] Working condition twelve: non-high temperature, driving condition, non-heavy load, hybrid drive mode, passenger compartment not cooled, battery liquid cooled, electric drive cooled, engine / range extender cooled, air conditioner not working.

[0059] Reference Figure 5 Consistent with working condition nine.

[0060] Working condition thirteen: non-high temperature, driving condition, non-heavy load, engine direct drive mode, passenger compartment not cooled, battery not working, electric drive not working, engine cooled, air conditioner not working.

[0061] Reference Figure 5 On the basis of working condition nine, the third electronic water pump 140 is controlled to be closed, the stop valve 250 is controlled to be in the closed state, and the fourth electronic water pump 210 is controlled to be closed, i.e., the electric drive system cooling circuit is in the non-working state.

[0062] Condition fourteen: non-high temperature, driving condition, large load, range extending mode, passenger cabin not cooled, battery coupled air conditioning cooled, electric drive cooled, engine / range extender cooled, air conditioning working.

[0063] Reference Figure 6 With Figure 14 , control the compressor 270 to open, control the first port and the second port of the four-way valve 280 to be connected, control the third port and the fourth port of the four-way valve 280 to be connected, control the second port and the third port of the eighth three-way valve 300 to be connected, the first port is closed, control the first electronic expansion valve 311 to be in a non-working state, control the second electronic expansion valve 312 to be in a working state, control the second port and the third port of the eleventh three-way valve 350 to be connected, the first port is closed, control the first port and the third port of the twelfth three-way valve 360 to be connected, the second port is closed; control the first electronic water pump 80 to open, control the first port and the fifth port of the five-way valve 30 to be connected, control the first port and the third port of the first three-way valve 40 to be connected, the second port is closed, control the fan 60 to open, control the fourth electronic water pump 210 to open, control the three ports of the sixth three-way valve 230 to be in an open state, control the first port and the third port of the seventh three-way valve 240 to be connected, the second port is closed; the rest of the components are in a non-opening or cut-off state.

[0064] Condition fifteen: non-high temperature, driving condition, large load, pure electric mode, passenger cabin not cooled, battery coupled air conditioning cooled, electric drive cooled, engine / range extender not working, air conditioning working.

[0065] Reference Figure 6 , on the basis of condition fourteen, control the first electronic water pump to close, that is, the engine / range extender cooling circuit is in a non-working state.

[0066] Condition sixteen: non-high temperature, driving condition, large load, engine / range extender direct drive mode, passenger cabin not cooled, battery not working, electric drive cooled, engine / range extender cooled, air conditioning not working.

[0067] Reference Figure 6 , on the basis of condition fourteen, control the compressor 270 to close, that is, the heat pump air conditioning circuit is in a non-working state.

[0068] Condition seventeen: non-high temperature, driving condition, large load, hybrid drive mode, passenger cabin not cooled, battery coupled air conditioning cooled, electric drive cooled, engine / range extender cooled, air conditioning working.

[0069] Reference Figure 6 , consistent with condition fourteen.

[0070] Condition eighteen: non-high temperature, driving condition, large load, engine direct drive mode, passenger cabin not cooled, battery not working, electric drive not working, engine cooling, air conditioner not working.

[0071] Reference Figure 6 On the basis of condition fourteen, the compressor 270 is controlled to be closed, that is, the heat pump air conditioning circuit is in a non-working state, and the fourth electronic water pump 210 is controlled to be closed, that is, the electric drive system cooling circuit is in a non-working state.

[0072] Condition nineteen: non-high temperature, parking condition, passenger cabin not cooled, battery idling charging and liquid cooling, electric drive not working, engine / range extender working, air conditioner not working.

[0073] Reference Figure 7 With Figure 14 , the compressor 270 is controlled to be in a closed state, that is, the heat pump air conditioning circuit is in a non-working state; the first electronic water pump 80 is controlled to be opened, the first port of the five-way valve 30 is connected with the fifth port, the first port of the first three-way valve 40 is connected with the third port, the second port is closed, the fan 60 is controlled to be opened, the third electronic water pump 140 is controlled to be opened, the second port of the fourth three-way valve 150 is connected with the third port, the first port is closed, the second port of the fifth three-way valve 160 is connected with the third port, the first port is closed, and the shut-off valve 250 is in a non-shut-off state; the rest of the components are in a non-opened or shut-off state.

[0074] Condition twenty: non-high temperature, parking condition, passenger cabin not cooled, battery not working, electric drive not working, engine / range extender not working, air conditioner not working.

[0075] Reference Figure 7 On the basis of condition nineteen, the first electronic water pump 80 is controlled to be closed, that is, the engine / range extender cooling circuit is in a non-working state; the third electronic water pump 140 is controlled to be closed, and the shut-off valve 250 is in a shut-off state.

[0076] Condition twenty-one: non-high temperature, parking condition, passenger cabin not cooled, battery charging and liquid cooling, electric drive not working, engine / range extender not working, air conditioner not working.

[0077] Reference Figure 7 On the basis of condition nineteen, the first electronic water pump 80 is controlled to be closed, that is, the engine / range extender cooling circuit is in a non-working state.

[0078] As a preferred embodiment of the present application, in the low-temperature waste heat recovery mode: Condition twenty-two: low temperature, driving condition, large load / non-large load, extended-range mode, passenger cabin heating, battery liquid cooling, electric drive cooling, engine / extended-range device working, battery, electric drive, engine / extended-range device waste heat recovery, directly supplying the passenger cabin, and the heat pump not working.

[0079] Reference Figure 8 With Figure 14 , the compressor 270 is controlled to be in the closed state, that is, the heat pump air conditioning circuit is in the non-working state; the first electronic water pump 80 is controlled to be turned on, the first port, the second port, and the fourth port of the five-way valve 30 are connected, the third port is connected with the fifth port, the three ports of the first three-way valve 40 are controlled to be communicated, the fan 60 is controlled to be turned on, the second electronic water pump 90 is controlled to be turned on, the first port and the second port of the second three-way valve 100 are connected, the third port is closed, the blower 120 is controlled to be turned on, the first port and the second port of the third three-way valve 130 are connected, the third port is closed, the third electronic water pump 140 is controlled to be turned on, the second port and the third port of the fourth three-way valve 150 are connected, the first port is closed, the three ports of the fifth three-way valve 160 are controlled to be communicated, the shut-off valve 250 is in the non-shut-off state, the fourth electronic water pump 210 is controlled to be turned on, the three ports of the sixth three-way valve 230 are controlled to be communicated, and the three ports of the seventh three-way valve 240 are controlled to be communicated; the rest of the components are in the non-working or closed state.

[0080] Condition twenty-three: low temperature, driving condition, large load, pure electric mode, passenger cabin heating, battery liquid cooling, electric drive cooling, engine / extended-range device not working, battery, electric drive waste heat recovery, directly supplying the passenger cabin, and the heat pump not working.

[0081] Reference Figure 8 With Figure 14 , on the basis of condition twenty-two, the first electronic water pump 80 is controlled to be closed, that is, the engine / extended-range device cooling circuit is in the non-working state, the second port and the fourth port of the five-way valve 30 are connected, the third port is connected with the fifth port, the second port and the third port of the first three-way valve 40 are connected, and the first port is closed.

[0082] Condition twenty-four: low temperature, driving condition, non-large load, pure electric mode, passenger cabin heating, battery liquid cooling, electric drive cooling, engine / extended-range device not working, battery, electric drive waste heat recovery, directly supplying the passenger cabin, and the heat pump working as a supplementary heat source.

[0083] Reference Figure 8 With Figure 14On the basis of the twenty-second working condition, the first electronic water pump 80 is controlled to be closed, that is, the engine / range extender cooling circuit is in a non-working state, the second port of the five-way valve 30 is controlled to be connected with the fourth port, the third port is controlled to be connected with the fifth port, the second port of the first three-way valve 40 is controlled to be connected with the third port, the first port is closed, the compressor 270 is controlled to be started, the first port and the fourth port of the four-way valve 280 are controlled to be connected, the second port and the third port are controlled to be connected, the first port and the second port of the eleventh three-way valve 350 are controlled to be opened, the third port is closed, the first port and the third port of the thirteenth three-way valve 340 are controlled to be opened, the second port is closed, the first port and the second port of the ninth three-way valve 320 are controlled to be opened, the third port is closed, the first electronic expansion valve 311 is controlled to be in a working state, the first port and the third port of the eighth three-way valve 300 are controlled to be opened, the second port is closed, and the remaining components are in a non-starting or closed state.

[0084] Working condition twenty-five: low temperature, driving working condition, large load / non-large load, engine / range extender direct drive mode, passenger compartment heating, battery non-working, electric drive cooling, engine / range extender working, electric drive, engine / range extender waste heat recovery, directly supplying the passenger compartment, heat pump non-working.

[0085] Reference Figure 8 On the basis of the twenty-second working condition, the third electronic water pump 140 is controlled to be closed, the second port and the third port of the fifth three-way valve 160 are controlled to be opened, the first port is closed, and the shut-off valve 250 is controlled to be in a closed state.

[0086] Working condition twenty-six: low temperature, driving working condition, large load / non-large load, engine direct drive mode, passenger compartment heating, battery non-working, electric drive non-working, engine working, engine waste heat recovery, directly supplying the passenger compartment, heat pump non-working.

[0087] Reference Figure 8 With Figure 14 On the basis of the twenty-second working condition, the third electronic water pump 140 is controlled to be closed, the second port and the third port of the fifth three-way valve 160 are controlled to be opened, the first port is closed, the shut-off valve 250 is controlled to be in a closed state, the fourth electronic water pump 210 is controlled to be closed, the first port and the fourth port of the five-way valve 30 are controlled to be connected, and the third port and the fifth port are controlled to be connected.

[0088] Working condition twenty-seven: low temperature, driving working condition, large load / non-large load, hybrid drive mode, passenger compartment heating, battery liquid cooling, electric drive cooling, engine / range extender working, battery, electric drive, engine / range extender waste heat recovery, directly supplying the passenger compartment, heat pump non-working.

[0089] Reference Figure 8 Consistent with the twenty-second working condition.

[0090] Condition twenty-eight: low temperature, driving condition, large load / non-large load, extended-range mode, passenger cabin heating, battery heating, electric drive cooling, engine / extended-range device working, electric drive, engine / extended-range device waste heat recovery, direct supply to passenger cabin and battery, heat pump not working.

[0091] Reference Figure 9 With Figure 14 , control the compressor 270 to be in the closed state, that is, the heat pump air conditioning circuit is in the non-working state; control the first electronic water pump 80 to be turned on, control the first port, the second port and the fourth port of the five-way valve 30 to be connected, the third port and the fifth port to be connected, control the three ports of the first three-way valve 40 to be communicated, control the fan 60 to be turned on, control the second electronic water pump 90 to be turned on, control the three ports of the second three-way valve 100 to be communicated, control the blower 120 to be turned on, control the three ports of the third three-way valve 130 to be communicated, control the third electronic water pump 140 to be turned on, control the first port and the second port of the fourth three-way valve 150 to be connected, the third port to be closed, control the fourth electronic water pump 210 to be turned on, control the three ports of the sixth three-way valve 230 to be communicated, control the three ports of the seventh three-way valve to be communicated; the rest of the components are in the state of not being turned on or being cut off.

[0092] Condition twenty-nine: low temperature, driving condition, large load, pure electric mode, passenger cabin heating, battery heating, electric drive cooling, engine / extended-range device not working, electric drive waste heat recovery, direct supply to passenger cabin and battery, heat pump not working.

[0093] Reference Figure 9 With Figure 14 , on the basis of condition twenty-eight, control the first electronic water pump 80 to be closed, that is, the engine / extended-range device cooling circuit is in the non-working state, control the second port and the fourth port of the five-way valve 30 to be connected, the third port and the fifth port to be connected, control the second port and the third port of the first three-way valve 40 to be connected, the first port to be closed.

[0094] Condition thirty: low temperature, driving condition, non-large load, pure electric mode, passenger cabin heating, battery heating, electric drive cooling, engine / extended-range device not working, electric drive waste heat recovery, direct supply to passenger cabin and battery, heat pump working as a supplementary heat source.

[0095] Reference Figure 9 With Figure 14On the basis of the twenty-eighth working condition, the first electronic water pump 80 is controlled to be closed, that is, the engine / range extender cooling circuit is in a non-working state, the second port and the fourth port of the five-way valve 30 are controlled to be connected, the third port and the fifth port are controlled to be connected, the second port and the third port of the first three-way valve 40 are controlled to be connected, the first port is controlled to be closed, the compressor 270 is controlled to be started, the first port and the fourth port of the four-way valve 280 are controlled to be connected, the second port and the third port are controlled to be connected, the three ports of the eleventh three-way valve 350 are controlled to be communicated, the first port and the third port of the twelfth three-way valve 360 are controlled to be connected, the second port is controlled to be closed, the first port and the third port of the thirteenth three-way valve 340 are controlled to be opened, the second port is controlled to be closed, the first port and the second port of the ninth three-way valve 320 are controlled to be opened, the third port is controlled to be closed, the first electronic expansion valve 311 is controlled to be in a working state, the second electronic expansion valve 312 is controlled to be in a working state, the three ports of the eighth three-way valve 300 are controlled to be communicated, and the remaining components are in a non-starting or closed state.

[0096] The thirty-first working condition: low temperature, driving working condition, large load / non-large load, hybrid driving mode, passenger compartment heating, battery heating, electric drive cooling, engine / range extender working, electric drive and engine / range extender waste heat recovery, directly supplying the passenger compartment and the battery, and the heat pump not working.

[0097] Reference Figure 9 Consistent with the twenty-eighth working condition.

[0098] The thirty-second working condition: low temperature, parking working condition, passenger compartment heating, battery idling charging and liquid cooling, electric drive not working, engine / range extender working, engine / range extender waste heat recovery, and heat pump not working.

[0099] Reference Figure 10 Consistent with Figure 14 , the compressor 270 is controlled to be in a closed state, that is, the heat pump air conditioning circuit is in a non-working state; the first electronic water pump 80 is controlled to be opened, the first port, the second port and the fourth port of the five-way valve 30 are controlled to be connected, the third port and the fifth port are controlled to be connected, the three ports of the first three-way valve 40 are controlled to be communicated, the fan 60 is controlled to be started, the second electronic water pump 90 is controlled to be opened, the first port and the second port of the second three-way valve 100 are controlled to be connected, the third port is controlled to be closed, the blower 120 is controlled to be started, the first port and the second port of the third three-way valve 130 are controlled to be connected, the third port is controlled to be closed, the third electronic water pump 140 is controlled to be opened, the second port and the third port of the fourth three-way valve 150 are controlled to be connected, the first port is controlled to be closed, the three ports of the fifth three-way valve 160 are controlled to be communicated, and the shut-off valve 250 is controlled to be in a non-closed state.

[0100] The thirty-third working condition: low temperature, parking working condition, passenger compartment heating, battery not working, electric drive not working, engine / range extender not working, and heat pump working.

[0101] Reference Figure 10 On the basis of working condition thirty-two, the first electronic water pump 80 is controlled to be closed, the second electronic water pump 90 is controlled to be closed, the third electronic water pump 140 is controlled to be closed, that is, the engine / range extender cooling circuit, the electric drive system cooling circuit, the passenger cabin heating circuit and the battery cooling / heating circuit are in a non-working state, the compressor 270 is controlled to be started, the first port and the fourth port of the four-way valve 280 are connected, the second port and the third port are connected, the first port and the second port of the eleventh three-way valve 350 are controlled to be opened, the third port is closed, the first port and the third port of the thirteenth three-way valve 340 are controlled to be opened, the second port is closed, the first port and the second port of the ninth three-way valve 320 are controlled to be opened, the third port is closed, the first electronic expansion valve 311 is controlled to be in a working state, the first port and the third port of the eighth three-way valve 300 are controlled to be opened, the second port is closed, and the remaining components are in a non-starting or closed state.

[0102] Working condition thirty-four: low temperature, parking condition, passenger cabin not heated, battery charged and liquid-cooled, electric drive not working, engine / range extender not working, heat pump not working.

[0103] Reference Figure 10 On the basis of working condition thirty-two, the first electronic water pump 80 is controlled to be closed, the second electronic water pump 90 is controlled to be closed, the second port and the third port of the fifth three-way valve 30 are connected, and the first port is closed.

[0104] As a preferred embodiment of the present application, in the deep low temperature waste heat recovery mode: Working condition thirty-five: deep low temperature, driving condition, large load / non-large load, hybrid drive mode, passenger cabin heating, battery heating, electric drive cooling, engine / range extender working, electric drive, engine / range extender waste heat recovery, heating battery and serving as evaporator heat source.

[0105] Reference Figure 11 With Figure 14, control the compressor 270 to open, control the first port and the fourth port of the four-way valve 280 to be connected, control the first port and the second port of the eleventh three-way valve 350 to open, the third port to close, control the first port and the third port of the thirteenth valve 340 to open, the second port to close, control the first port and the second port of the ninth three-way valve 320 to open, the third port to close, control the first electronic expansion valve 311 to be in a non-working state, control the first port and the second port of the eighth three-way valve 300 to open, the third port to close, control the second electronic expansion valve 312 to be in a working state, control the second port and the third port of the twelfth three-way valve 360 to be connected, the first port to close; control the first electronic water pump 80 to open, control the first port, the second port and the fourth port of the five-way valve 30 to be connected, the third port and the fifth port to be connected, control the three ports of the first three-way valve 40 to be communicated, control the fan 60 to open, control the second electronic water pump 90 to open, control the three ports of the second three-way valve 100 to be communicated, control the blower 120 to open, control the three ports of the third three-way valve 130 to be communicated, control the third electronic water pump 140 to open, control the first port and the second port of the fourth three-way valve 150 to be connected, the third port to close, control the fourth electronic water pump 210 to open, control the three ports of the sixth three-way valve 230 to be communicated, control the three ports of the seventh three-way valve 240 to be communicated; the rest of the components are in a non-opening or cut-off state.

[0106] Condition thirty-six: deep low temperature, driving condition, large load / non-large load, range extending mode, passenger cabin heating, battery heating, electric drive cooling, engine / range extender working, electric drive, engine / range extender waste heat recovery, heating battery and evaporator heat source.

[0107] Reference Figure 11 Consistent with condition thirty-five.

[0108] Condition thirty-seven: deep low temperature, driving condition, large load / non-large load, range extending direct drive mode, passenger cabin heating, battery not working, electric drive cooling, engine / range extender working, electric drive, engine / range extender waste heat recovery, heating passenger cabin, heat pump not working.

[0109] Reference Figure 11 On the basis of condition thirty-five, control the compressor 270 to close, i.e. the heat pump air conditioning circuit is in a non-working state, control the first port and the second port of the second three-way valve 100 to be connected, the third port to close, control the third electronic water pump 140 to close, control the first port and the second port of the third three-way valve 130 to be connected, the third port to close.

[0110] Condition thirty-eight: deep low temperature, driving condition, large load, engine direct drive mode, passenger cabin heating, battery not working, electric drive not working, engine working, engine waste heat recovery, only as evaporator heat source.

[0111] With reference to Figure 11 With reference to Figure 14 On the basis of working condition thirty-five, the second port of the second three-way valve 100 is connected with the third port, the first port is closed, the first port of the third three-way valve 130 is connected with the third port, the second port is closed, the fourth electronic water pump 210 is controlled to be closed, the first port of the five-way valve 30 is connected with the fourth port, the third port is connected with the fifth port, the first port of the first three-way valve 40 is connected with the third port, and the second port is closed.

[0112] Working condition thirty-nine: deep low temperature, driving working condition, non-heavy load, engine direct drive mode, passenger compartment heating, battery non-working, electric drive non-working, engine working, engine waste heat recovery, heating passenger compartment and serving as evaporator heat source, improving heat pump low temperature working adaptability.

[0113] With reference to Figure 11 With reference to Figure 14 On the basis of working condition thirty-five, the fourth electronic water pump 210 is controlled to be closed, the first port of the five-way valve 30 is connected with the fourth port, the third port is connected with the fifth port, the first port of the first three-way valve 40 is connected with the third port, and the second port is closed.

[0114] Working condition forty: deep low temperature, driving working condition, non-heavy load, pure electric mode, passenger compartment heating, battery heating, electric drive cooling, engine / range extender non-working, motor locked-rotor, electric drive waste heat recovery, heating battery and serving as evaporator heat source.

[0115] With reference to Figure 12 With reference to Figure 14, control the compressor 270 to open, control the first port and the fourth port of the four-way valve 280 to connect, control the first port and the second port of the eleventh three-way valve 350 to open, control the third port to close, control the first port and the third port of the thirteenth valve 340 to open, control the second port to close, control the first port and the second port of the ninth three-way valve 320 to open, control the third port to close, control the first electronic expansion valve 311 to be in a non-working state, control the first port and the second port of the eighth three-way valve 300 to open, control the third port to close, control the second electronic expansion valve 312 to be in a working state, control the second port and the third port of the twelfth three-way valve 360 to connect, control the first port to close; control the second port and the fourth port of the five-way valve 30 to connect, control the third port and the fifth port to connect, control the second port and the third port of the first three-way valve 40 to connect, control the first port to close, control the fan 60 to open, control the second electronic water pump 90 to open, control the second port and the third port of the second three-way valve 100 to connect, control the first port to close, control the blower 120 to open, control the first port and the third port of the third three-way valve 130 to connect, control the second port to close, control the third electronic water pump 140 to open, control the first port and the second port of the fourth three-way valve 150 to connect, control the third port to close, control the fourth electronic water pump 210 to open, control the driving motor 221 to run at a locked-rotor state, control the three ports of the sixth three-way valve 230 to be in communication, control the three ports of the seventh three-way valve 240 to be in communication; the rest of the components are in a non-opening or cut-off state.

[0116] Condition forty-one: deep low temperature, running condition, large load, pure electric mode, passenger compartment heating, battery heating, electric drive cooling, engine / range extender not working, electric drive waste heat recovery, heating battery and as evaporator heat source.

[0117] Reference Figure 12 , on the basis of condition forty, the driving motor 221 is closed to run at a locked-rotor state.

[0118] Condition forty-two: deep low temperature, parking condition, passenger compartment heating, battery idling charging and heating, electric drive not working, engine / range extender working, engine / range extender waste heat recovery, heating passenger compartment and battery and as evaporator heat source.

[0119] Reference Figure 13 and Figure 14, control the compressor 270 to open, control the first port and the fourth port of the four-way valve 280 to connect, control the first port and the second port of the eleventh three-way valve 350 to open, the third port to close, control the first port and the third port of the thirteenth three-way valve 340 to open, the second port to close, control the first port and the second port of the ninth three-way valve 320 to open, the third port to close, control the first electronic expansion valve 311 to be in a non-working state, control the first port and the second port of the eighth three-way valve 300 to open, the third port to close, control the second electronic expansion valve 312 to be in a working state, control the second port and the third port of the twelfth three-way valve 360 to connect, the first port to close; control the first electronic water pump 80 to open, control the first port and the fourth port of the five-way valve 30 to connect, the third port and the fifth port to connect, control the first port and the third port of the first three-way valve 40 to connect, the second port to close, control the fan 60 to open, control the second electronic water pump 90 to open, control the three ports of the second three-way valve 100 to be in communication, control the blower 120 to open, control the three ports of the third three-way valve 130 to be in communication, control the third electronic water pump 140 to open, control the first port and the second port of the fourth three-way valve 150 to connect, the third port to close; the rest of the components are in a non-opening or cut-off state.

[0120] Condition forty-three: deep low temperature, parking condition, passenger cabin heating, battery not working, motor locked-rotor, engine / range extender not working, electric drive waste heat recovery, only evaporator heat source, heat pump working.

[0121] Reference Figure 13 With Figure 14 , on the basis of condition forty-two, control the first electronic water pump 80 to close, control the second port and the fourth port of the five-way valve 30 to connect, the third port and the fifth port to connect, control the second port and the third port of the first three-way valve 40 to connect, the first port to close, control the fourth electronic water pump 210 to open, control the drive motor 221 to be locked-rotor, control the first port and the second port of the sixth three-way valve 230 to connect, the third port to close, control the second port and the third port of the seventh three-way valve 240 to connect, the first port to close, control the second port and the third port of the second three-way valve 100 to connect, the first port to close, control the first port and the third port of the third three-way valve 130 to connect, the second port to close.

[0122] Condition forty-four: deep low temperature, parking condition, passenger cabin not heating, battery charging and heating, motor locked-rotor, engine / range extender not working, motor waste heat recovery, only heating battery, heat pump not working.

[0123] Reference Figure 13 With Figure 14On the basis of the forty-second working condition, the first electronic water pump 80 is controlled to be closed, the second port of the five-way valve 30 is controlled to be connected with the fourth port, the third port is controlled to be connected with the fifth port, the second port of the first three-way valve 40 is controlled to be connected with the third port, the first port is controlled to be closed, the fourth electronic water pump 210 is controlled to be started, the driving motor 221 is controlled to be locked-rotor, the first port of the sixth three-way valve 230 is controlled to be connected with the second port, the third port is controlled to be closed, the second port of the seventh three-way valve 240 is controlled to be connected with the third port, the first port is controlled to be closed, the second port of the second three-way valve 100 is controlled to be connected with the third port, the first port is controlled to be closed, the first port of the third three-way valve 130 is controlled to be connected with the third port, the second port is controlled to be closed, and the compressor 270 is controlled to be closed, so that the heat pump air conditioning circuit is in a non-working state.

[0124] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A thermal management system for new energy hybrid vehicles based on a dual-medium cold plate, characterized in that, It includes 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 dual-medium cold plates in the heat pump air conditioning circuit and the battery cooling / heating circuit have independent refrigerant channels and coolant channels that can exchange heat; the refrigerant channel of the dual-medium cold plate is connected to the heat pump air conditioning circuit, and the coolant channel of the dual-medium cold plate is connected to the battery cooling / heating circuit; the dual-medium cold plate is used for thermal coupling between the heat pump air conditioning circuit and the battery cooling / heating circuit.

2. The thermal management system for new energy hybrid vehicles based on a dual-medium cold plate according to claim 1, characterized in that, The heat pump air conditioning circuit includes a dual-medium cold plate, a compressor, an outdoor heat exchanger, an indoor condenser, an indoor evaporator, and a liquid receiver. One end of the compressor is connected to the liquid receiver, and the other end is connected to the first port of a four-way valve. The second port of the four-way valve is connected to the outdoor heat exchanger, the third port of the four-way valve is connected to the liquid receiver, and the fourth port of the four-way valve is connected to the second port of an eleventh three-way valve. The first port of the eleventh three-way valve is connected to the first port of the thirteenth three-way valve, and the second and third ports of the thirteenth three-way valve are respectively connected to the indoor evaporator and the indoor condenser. The liquid receiver is also connected to the tenth... The second port of the two-way valve is connected, and the first port of the twelfth-way valve is connected to the third port of the eleventh-way valve; the other end of the outdoor heat exchanger is connected to the third port of the eighth-way valve, and the first port of the eighth-way valve is connected to the first port of the ninth-way valve through the first electronic expansion valve; the second and third ports of the ninth-way valve are respectively connected to the indoor condenser and the indoor evaporator; the second port of the eighth-way valve is connected to the first refrigerant port of the dual-medium cold plate through the second electronic expansion valve, and the second refrigerant port of the dual-medium cold plate is connected to the third port of the twelfth-way valve. The engine / range extender cooling circuit includes an engine / range extender, a thermostat, a high-temperature radiator, a first expansion tank, and a first electric water pump; the engine / range extender is connected to the first port of the thermostat; the engine / range extender is also connected to the first electric water pump, the first electric water pump is connected to the first expansion tank, and the first expansion tank is also connected to the third port of the thermostat, the first expansion tank is also connected to the high-temperature radiator, and the high-temperature radiator is also connected to the first port of a first three-way valve; the second port of the thermostat is connected to the first port of a five-way valve, and the fifth port of the five-way valve is connected to the third port of the first three-way valve; The electric drive system cooling circuit includes a fourth electronic water pump, a drive motor, a motor controller, a cryogenic radiator, and a second expansion tank. The second expansion tank is connected to both the fourth electronic water pump and the cryogenic radiator, and the second port of the first three-way valve is connected to the pipeline between the cryogenic radiator and the second expansion tank via a second one-way valve. The fourth electronic water pump is connected to both the drive motor and the motor controller. The drive motor and the motor controller are connected to the second and third ports of a sixth three-way valve, respectively. The first port of the sixth three-way valve is connected to the third port of a seventh three-way valve. The first port of the seventh three-way valve is connected to the cryogenic radiator, and the second port of the seventh three-way valve is connected to the second port of a five-way valve. The crew cabin heating circuit includes a second electronic water pump and a heater core; one end of the second electronic water pump is connected to the fourth port of a five-way valve, and the other end is connected to the second port of a second three-way valve; the first port of the second three-way valve is connected to one end of the heater core, and the third port of the second three-way valve is connected to the first port of the coolant of the dual-medium cold plate; the other end of the heater core is connected to the second port of a third three-way valve, and the first port of the third three-way valve is connected to the third port of the five-way valve. The battery cooling / heating circuit includes a third electronic water pump and a power battery pack; one end of the third electronic water pump is connected to the second port of the coolant of the dual-medium cold plate, and the other end is connected to the second port of the fourth three-way valve. The first port of the fourth three-way valve is connected to the third port of the third three-way valve, the third port of the fourth three-way valve is connected to the second port of the fifth three-way valve, the first port of the fifth three-way valve is connected to the second port of the five-way valve, the third port of the fifth three-way valve is connected to the first one-way valve, and the other end of the first one-way valve is connected to the pipeline between the seventh three-way valve and the low-temperature radiator.

3. The thermal management system for new energy hybrid vehicles based on a dual-medium cold plate according to claim 2, characterized in that, The thermal management system also includes a radiator assembly and a crew compartment assembly; The outdoor heat exchanger, low-temperature radiator, high-temperature radiator and fan are all integrated into the radiator assembly. The fan exchanges heat with the outdoor heat exchanger, low-temperature radiator and high-temperature radiator by turbulent airflow. The heating core, indoor condenser, indoor evaporator and blower are all integrated in the passenger compartment. The blower exchanges heat with the heating core, indoor condenser and indoor evaporator by turbulent air flow, and provides cold or warm air to the passenger compartment.

4. The thermal management system for new energy hybrid vehicles based on a dual-medium cold plate according to claim 3, characterized in that, The dual-medium cold plate includes refrigerant channels and coolant channels arranged in an alternating manner. The first refrigerant port and the second refrigerant port are both located on the refrigerant channels, and the first coolant port and the second coolant port are both located on the coolant channels.

5. A thermal management method for new energy hybrid electric vehicles based on a dual-medium cold plate, based on the thermal management system for new energy hybrid electric vehicles based on a dual-medium cold plate as described in claim 4, characterized in that, Includes the following steps: Step 1: Acquire the vehicle's thermal management requirements signal and ambient temperature signal; Step 2: Based on the thermal management demand signal and the ambient temperature signal, control the on / off status of the four-way valve, five-way valve and each three-way valve, as well as the operating status of the compressor and each electric water pump, and switch between high temperature cooling mode, non-high temperature mode, low temperature waste heat recovery mode, deep low temperature waste heat recovery mode and battery cooling mode.

6. The thermal management method for new energy hybrid electric vehicles based on a dual-medium cold plate according to claim 5, characterized in that, When in a high-temperature environment, switch to the high-temperature cooling mode: control the heat pump air conditioning circuit to be in cooling mode, control the dual-medium cold plate to work only in the refrigerant flow channel, and cool the battery and passenger compartment through the heat pump air conditioning circuit; at the same time, control the electric drive system cooling circuit and the engine / range extender cooling circuit to operate independently for heat dissipation; In the high-temperature cooling mode: the blower is turned on; the first and second ports of the four-way valve are connected, and the third and fourth ports are connected; the refrigerant is distributed to the indoor evaporator and the dual-medium cold plate through the eighth three-way valve; the fan is turned on; when the electric drive system is working, the fourth electronic water pump is turned on, and the first and third ports of the seventh three-way valve are opened; when the engine / range extender is working, the first electronic water pump is turned on, and the first and third ports of the first three-way valve are opened.

7. The thermal management method for new energy hybrid electric vehicles based on a dual-medium cold plate according to claim 5, characterized in that, When in a non-high temperature environment, switch to the non-high temperature mode and adjust according to the load status: under low load, control the heat pump air conditioning circuit to not work, and only the coolant flow channel of the dual medium cold plate works, using the coolant to cool the battery through the low temperature radiator; under high load, control the heat pump air conditioning circuit to switch to cooling mode, and only the refrigerant flow channel of the dual medium cold plate works, cooling the battery through the heat pump air conditioning circuit. Under the high-load condition of the non-high-temperature mode: control the compressor to start, control the connection of the first port and the second port of the four-way valve, and the connection of the third port and the fourth port; control the blower to stop, control the opening of the second and third ports of the eighth three-way valve, and the closing of the first port, supplying liquid only to the dual-medium cold plate; under the non-high-load condition of the non-high-temperature mode: control the third electronic water pump to start, control the opening of the second and third ports of the fourth and fifth three-way valves, and control the opening of the shut-off valve.

8. The thermal management method for new energy hybrid electric vehicles based on a dual-medium cold plate according to claim 5, characterized in that, When in a low-temperature environment, switch to the low-temperature waste heat recovery mode: the control system recovers waste heat from the battery, electric drive system and engine / range extender, and heats the passenger compartment through the heater core; If the residual heat is insufficient, the heat pump air conditioning circuit will be turned on in heat pump mode as a supplementary heat source. In the low-temperature waste heat recovery mode: when the electric drive system is working, the fourth electronic water pump is controlled; when the engine / range extender is working, the first electronic water pump is controlled to open. Through the seventh three-way valve and the first three-way valve, some high-temperature coolant enters the five-way valve. The first port of the five-way valve is connected to the fourth port, and the third port is connected to the fifth port, allowing the high-temperature coolant to enter the second three-way valve. The high-temperature coolant flow is distributed to the heater core and the dual-medium cold plate through the second three-way valve. When the heat pump mode is activated as a supplementary heat source, the compressor is controlled to open. The first port of the four-way valve is connected to the fourth port, and the second port is connected to the third port. The third port of the second three-way valve is controlled to close, preventing coolant from entering the dual-medium cold plate. The refrigerant flow is distributed to the indoor condenser and the dual-medium cold plate through the eleventh three-way valve.

9. The thermal management method for new energy hybrid electric vehicles based on a dual-medium cold plate according to claim 5, characterized in that, When in a deep cryogenic environment and the air source heat pump cannot operate normally, switch to the deep cryogenic waste heat recovery mode: recover the waste heat of the electric drive system and engine / range extender, and heat the passenger compartment and battery through the heater core and dual-medium cooling plate; If the residual heat is insufficient, the motor will be controlled to enter a stalled state to generate heat, and the generated heat will be supplied to the dual-medium cold plate as an evaporation heat source to start the heat pump cycle. In the deep low-temperature waste heat recovery mode: the heat pump air conditioning circuit is controlled to absorb waste heat from the electric drive system and the engine / range extender; the first port of the four-way valve is connected to the fourth port, and the second port is connected to the third port; the first electronic expansion valve is controlled to be fully open, and the second electronic expansion valve is controlled to throttle and expand, so that the low-temperature refrigerant absorbs heat and evaporates in the dual-medium cold plate; the five-way valve and each three-way valve are controlled to introduce the coolant of the electric drive system and the engine / range extender into the coolant flow channel of the dual-medium cold plate.

10. The thermal management method for new energy hybrid electric vehicles based on a dual-medium cold plate according to claim 5, characterized in that, When the power battery pack is in a high-rate fast charging state, switch to battery cooling mode: if the power battery pack has low heat dissipation requirements and the ambient temperature is not high, control the opening of the coolant flow channel of the dual-medium cold plate to dissipate heat through the low-temperature radiator; if the power battery pack has high heat dissipation requirements or the ambient temperature is high, control the opening of the refrigerant flow channel of the dual-medium cold plate to start the heat pump air conditioning circuit for cooling. In the battery-cooled heat pump air conditioner cooling state: control the compressor to start, control the connection between the first and second ports of the four-way valve, control the opening of the second and third ports of the eighth three-way valve, and control the opening of the second and third ports of the twelfth three-way valve; in the battery-cooled low-temperature radiator cooling state: control the third electronic water pump to start, control the opening of the second and third ports of the fourth and fifth three-way valves, and control the opening of the shut-off valve.

Images