CN116653553A - Thermal management system of pure electric vehicle and control method thereof - Google Patents

Thermal management system of pure electric vehicle and control method thereof Download PDF

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Publication number
CN116653553A
CN116653553A CN202310773287.0A CN202310773287A CN116653553A CN 116653553 A CN116653553 A CN 116653553A CN 202310773287 A CN202310773287 A CN 202310773287A CN 116653553 A CN116653553 A CN 116653553A
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China
Prior art keywords
port
way valve
valve
closed
opened
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CN202310773287.0A
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Chinese (zh)
Inventor
高游游
徐兴
李蒙
陈骁
李勇
凌和平
廉玉波
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Jiangsu University
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Jiangsu University
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Priority to CN202310773287.0A priority Critical patent/CN116653553A/en
Publication of CN116653553A publication Critical patent/CN116653553A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression
    • B60H1/3227—Cooling devices using compression characterised by the arrangement or the type of heat exchanger, e.g. condenser, evaporator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
    • B60H1/00278—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit for the battery
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
    • B60H1/00385—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell
    • B60H1/00392—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell for electric vehicles having only electric drive means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00485—Valves for air-conditioning devices, e.g. thermostatic valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
    • B60H1/03—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant and from a source other than the propulsion plant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
    • B60H1/14—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit
    • B60H1/143—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit the heat being derived from cooling an electric component, e.g. electric motors, electric circuits, fuel cells or batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
    • B60H1/2215—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant the heat being derived from electric heaters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression
    • B60H1/3205—Control means therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression
    • B60H1/3223—Cooling devices using compression characterised by the arrangement or type of the compressor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression
    • B60H1/3228—Cooling devices using compression characterised by refrigerant circuit configurations
    • B60H1/32284—Cooling devices using compression characterised by refrigerant circuit configurations comprising two or more secondary circuits, e.g. at evaporator and condenser side
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K11/00—Arrangement in connection with cooling of propulsion units
    • B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/27—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/66—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells
    • H01M10/663—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells the system being an air-conditioner or an engine
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Transportation (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention discloses a heat management system of a pure electric vehicle and a control method thereof, wherein the heat management system comprises a heat pump refrigerant cycle, a cabin heating cycle, an electric drive cooling liquid cycle and a battery cooling liquid cycle, can realize a plurality of working modes including a heat pump cabin heating mode, a heat pump cabin heating mode by utilizing electric drive waste heat, an electric drive waste heat cabin heating mode, an electric drive waste heat battery heating mode, a cabin air conditioner refrigerating and electric drive battery radiator cooling mode, a cabin air conditioner refrigerating and battery chiller refrigerating and electric drive radiator cooling mode, and covers various heat management requirements under all-weather conditions and reduces energy consumption through reasonable waste heat utilization.

Description

Thermal management system of pure electric vehicle and control method thereof
Technical Field
The invention relates to the technical field of whole-vehicle thermal management of pure electric vehicles, in particular to a thermal management system of a pure electric vehicle and a control method thereof.
Background
The heating, ventilation and air conditioning system is a system with the largest power consumption in the accessories of the pure electric vehicle, and the efficiency of the system has great influence on the endurance mileage of the vehicle. Under the heating working condition in winter, most pure electric vehicles use the PTC electric heater for heating, so that the COP (heating efficiency) of the heating ventilation air conditioner is not more than 1, and the endurance mileage of the pure electric vehicles is greatly reduced.
Although the heat pump air conditioner heat management system can improve the refrigerating and heating efficiency, the heat pump air conditioner heat management system has lower heating efficiency and frequent defrosting in a low-temperature environment and is a common problem in the current industry. Because the power battery and the electric drive thermal management system are relatively isolated, the energy coupling and the further integrated management among the systems cannot be comprehensively managed, and the waste heat of the systems cannot be fully utilized. If the waste heat of the electric drive system and the power battery can be led to the heat pump air conditioning system, the overall heating efficiency of the thermal management system can be greatly increased.
Therefore, there is a need to develop an efficient whole car thermal management system that can heat the cabin and waste heat recovery at low temperatures, cool the electric drive, battery and cabin sufficiently at medium and high temperatures, and meet various thermal management needs with low energy consumption in all-weather conditions.
Disclosure of Invention
In view of the above, the invention provides a thermal management system for a pure electric vehicle and a control method thereof.
The present invention achieves the above technical object by the following means.
A thermal management system for a blade electric vehicle, comprising:
the first branch comprises a compressor, a first three-way valve, a water condenser, a first electronic expansion valve, an outdoor heat exchanger, a four-way valve, a second electronic expansion valve, a cold water machine, a single-way valve and a gas-liquid separator which are sequentially communicated, wherein a third electronic expansion valve and an evaporator are connected between the other two ports of the four-way valve, the evaporator is also communicated with the single-way valve, and the first electronic expansion valve and the outdoor heat exchanger are communicated with one port of the first three-way valve through a pipeline;
The second branch comprises a first water pump, a heater core, a second three-way valve, a heater and a water condenser which are sequentially communicated;
the third branch comprises a second water pump, an electric drive system, a third three-way valve, a fourth three-way valve, a third water pump, a battery system and a first switch valve which are sequentially communicated, wherein the third three-way valve is communicated with the first switch valve, the fourth three-way valve is communicated with a cold water machine, the battery system is communicated with the first switch valve through a pipeline, the second water pump is communicated with one port of the second three-way valve through a pipeline, a pipeline node between the electric drive system and the third three-way valve, a pipeline node between the third three-way valve and the fourth three-way valve are communicated through a radiator, and the radiator is communicated with the heater core and the second three-way valve through a pipeline.
In the above technical scheme, the radiator is provided with a fan, and the evaporator is provided with a blower.
In the above technical scheme, the compressor, the first three-way valve, the first electronic expansion valve, the four-way valve, the second electronic expansion valve, the third electronic expansion valve, the first water pump, the heater, the second three-way valve, the second water pump, the third three-way valve, the fourth three-way valve, the third water pump, the first switch valve, the second switch valve, the fan and the blower are all in communication connection with the output interface of the control module.
The control module controls the flow of the refrigerant through controlling the compressor, controls the flow of the cooling liquid through controlling the first water pump, the second water pump and the third water pump, controls the flow of the air through controlling the fan and the blower, controls the heating power of the heater, and controls the fluid communication, closing or appointed flowing states through controlling the first electronic expansion valve, the second electronic expansion valve, the third electronic expansion valve, the four-way valve, the first switching valve, the second switching valve, the first three-way valve, the second three-way valve, the third three-way valve and the fourth three-way valve, thereby realizing a heat pump heating cabin mode, a heat pump heating cabin and electric drive waste heat recovery mode, an electric drive waste heat heating cabin mode, an electric drive waste heat heating battery mode, a cabin air conditioner refrigerating and electric drive battery radiator cooling mode, an air conditioner refrigerating and battery cooling mode and an electric drive radiator cooling mode of the whole vehicle heat management system.
Further, when the heat pump heats the cabin mode, the control module controls the second port of the first three-way valve to be closed, the first port and the third port to be opened, the third port and the fourth port of the four-way valve to be opened, the first port and the second port to be closed, the first electronic expansion valve to be partially opened, the second electronic expansion valve and the third electronic expansion valve to be closed, the first port and the third port of the second three-way valve to be opened, the second port to be closed, the refrigerant flow of the compressor to be controlled, the cooling liquid flow of the first water pump to be controlled, the air flow of the fan to be controlled, and the heating power of the heater to be controlled.
Further, when the heat pump heats the cabin and the electric drive waste heat recovery mode, the control module controls the second port of the first three-way valve to be closed, the first port and the fourth port of the four-way valve to be opened, the second port and the third port to be closed, the first electronic expansion valve to be fully opened, the second electronic expansion valve to be partially opened, the third electronic expansion valve to be closed, the first switch valve to be opened, the second switch valve to be closed, the second port of the second three-way valve to be closed, the first port and the third port to be opened, the second port and the third port to be closed, the first port and the third port to be opened, the first port and the second port to be opened, the refrigerant flow of the compressor to be controlled, the cooling liquid flow of the first water pump and the second water pump to be fully opened, and the air flow of the fan and the blower to be controlled.
Further, when the electric drive waste heat heating cabin mode is adopted, the control module controls the second port of the third three-way valve to be closed, the first port and the third port to be opened, the first switch valve to be closed, the second switch valve to be opened, the first port of the second three-way valve to be closed, the second port and the third port to be opened, the first electronic expansion valve, the second electronic expansion valve and the third electronic expansion valve to be closed, the refrigerant flow of the compressor to be controlled, the cooling liquid flow of the first water pump and the second water pump to be controlled, and the air flow of the fan and the blower to be controlled.
Further, when the electric drive waste heat heats the battery mode, the control module controls the second port of the third three-way valve to be closed, the first port and the third port to be opened, the second port of the fourth three-way valve to be closed, the first port and the third port to be opened, the first switch valve to be opened, the second switch valve, the first three-way valve, the second three-way valve, the four-way valve, the first electronic expansion valve, the second electronic expansion valve and the third electronic expansion valve to be closed, the refrigerant flow of the compressor to be controlled, the cooling liquid flow of the second water pump to be controlled, and the air flow of the fan to be controlled.
Further, when the cabin air conditioner is in a refrigerating mode and the electric drive battery radiator is in a cooling mode, the control module controls the first port of the first three-way valve to be closed, the second port of the first three-way valve to be opened, the third port of the four-way valve to be closed, the second port of the second three-way valve to be opened, the fourth port of the fourth three-way valve to be closed, the first port of the fourth three-way valve to be opened, the first switch valve to be opened, the second switch valve to be closed, the refrigerant flow of the compressor to be controlled, the coolant flow of the second water pump to be controlled, the coolant flow of the third water pump to be opened, and the air flow of the fan to be controlled.
Further, when the cabin air conditioner is refrigerating, the battery chiller is refrigerating and the electric radiator is in a cooling mode, the control module controls the second port of the first three-way valve to be closed, the first port and the third port of the first three-way valve to be opened, the third port of the four-way valve to be closed, the first port, the second port and the fourth port of the four-way valve to be opened, the first electronic expansion valve to be closed, the second electronic expansion valve to be partially opened, the second three-way valve to be closed, the third port of the third three-way valve to be closed, the first port and the second port to be opened, the third port of the fourth three-way valve to be closed, the first switch valve and the second switch valve to be closed, the refrigerant flow of the compressor to be controlled, the coolant flow of the second water pump and the third water pump to be opened, and the air flow of the fan to be controlled.
The beneficial effects of the invention are as follows:
(1) The heat management system of the pure electric vehicle comprises a heat pump refrigerant cycle, a cabin heating cycle, an electric drive cooling liquid cycle and a battery cooling liquid cycle, wherein the heat pump refrigerant cycle comprises a compressor, a water condenser, an outdoor heat exchanger, a water chiller, a one-way valve, a gas-liquid separator, an evaporator, a first three-way valve, a first electronic expansion valve, a four-way valve, a second electronic expansion valve and a third electronic expansion valve, the cabin heating cycle comprises a first water pump, a heater core and a second three-way valve, the electric drive cooling liquid cycle comprises a second water pump, an electric drive system, a third three-way valve and a radiator, and the battery cooling liquid cycle comprises a fourth three-way valve, a third water pump and a battery system; the connection relation of all the components in the thermal management system is easy to implement, and the control logic is simple and clear;
(2) The heat management system provided by the invention realizes a plurality of working modes including a heat pump cabin heating mode, a heat pump cabin heating mode by utilizing electric drive waste heat, an electric drive waste heat cabin heating mode, an electric drive waste heat battery heating mode, a cabin air conditioner refrigerating and electric drive battery radiator cooling mode, a cabin air conditioner refrigerating and battery chiller refrigerating and electric drive radiator cooling mode, so that various heat management requirements under all-weather conditions are covered, and energy consumption is reduced through reasonable waste heat utilization; the heat pump cabin heating mode utilizes the characteristic that the heat pump refrigerant is circulated to provide a heating function, so that the energy consumption of cabin heating is reduced; the heat pump utilizes the electric drive waste heat to heat the cabin, the energy consumption of defrosting of the outdoor heat exchanger and heating of the cabin is reduced by utilizing the electric drive waste heat, and the efficient operation of the heat pump system is ensured by the waste heat recovery of the electric drive system; the electric drive waste heat heating cabin mode ensures the driving safety of timely defrosting or defogging under the frosting or foggy condition of the windshield, and reduces the energy consumption of cabin heating by utilizing the electric drive waste heat; the electric drive waste heat heating battery mode utilizes the electric drive waste heat to reduce the energy consumption of a system heating battery; the cabin air conditioner refrigerating and electric driving battery radiator cooling mode ensures the thermal comfort of the cabin at medium temperature and the electric driving and battery thermal management safety, and achieves the effect of reducing the thermal management energy consumption; cabin air conditioner refrigeration and electric drive radiator cooling and battery chiller cooling mode have guaranteed the travelling comfort of cabin under the high temperature and electric drive and battery thermal management security, and battery chiller cooling has solved the problem that battery radiator cooling is insufficient at the heat dissipation under the high temperature.
Drawings
Fig. 1 is a block diagram of a thermal management system of a pure electric vehicle according to the present invention;
FIG. 2 is a schematic diagram of communication connection between a control module and each actuator of the overall thermal management system of FIG. 1;
FIG. 3 is a schematic internal block diagram of the control module shown in FIG. 2;
FIG. 4 is a system diagram of the overall vehicle thermal management system of FIG. 1 in a heat pump cabin heating mode;
FIG. 5 is a system diagram of the whole vehicle thermal management system shown in FIG. 1 in a heat pump (electric drive waste heat recovery) heating cabin and electric drive waste heat recovery mode;
FIG. 6 is a system diagram of the whole vehicle thermal management system shown in FIG. 1 in an electric drive waste heat heating cabin mode;
FIG. 7 is a system diagram of the entire vehicle thermal management system of FIG. 1 in an electric drive waste heat heating battery mode;
FIG. 8 is a system diagram of the overall thermal management system of FIG. 1 in cabin air conditioning cooling and electric drive battery radiator cooling mode;
FIG. 9 is a system diagram of the overall vehicle thermal management system of FIG. 1 in cabin air conditioning cooling and electric drive radiator cooling and battery chiller cooling modes;
in the figure: 100-whole car thermal management system, 101-compressor, 102-first three-way valve, 103-water condenser, 104-first electronic expansion valve, 105-outdoor heat exchanger, 106-four-way valve, 107-second electronic expansion valve, 108-cold water machine, 109-third electronic expansion valve, 110-evaporator, 111-one-way valve, 112-gas-liquid separator, 201-first water pump, 202-heater, 203-second three-way valve, 204-heater core, 301-second water pump, 302-electric drive system, 303-third three-way valve, 304-fourth three-way valve, 305-third water pump, 306-battery system, 307-first switch valve, 308-radiator, 309-second switch valve, 401-fan, 402-blower, 1011-compressor exhaust port, 1012-compressor suction, 1021-first three-way valve first port, 1022-first three-way valve second port 1022, 1023-first three-way valve third port, 1031-water condenser refrigerant passage outlet, 1032-water condenser cooling liquid passage outlet, 1033-water condenser cooling liquid passage inlet, 1034-water condenser refrigerant passage inlet, 1041-first electronic expansion valve first port, 1042-first electronic expansion valve second port, 1051-outdoor heat exchanger outlet, 1052-outdoor heat exchanger inlet, 1061-four-way valve first port, 1062-four-way valve second port, 1063-four-way valve third port, 1064-four-way valve fourth port, 1071-second electronic expansion valve first port, 1072-second electronic expansion valve second port, 1081-chiller refrigerant passage outlet, 1082-chiller coolant outlet, 1083-chiller coolant inlet, 1084-chiller refrigerant passage inlet, 1091-third electronic expansion valve first port, 1092-third electronic expansion valve second port, 1101-evaporator refrigerant passage outlet, 1102-evaporator refrigerant passage inlet, 1111-single pass valve first port, 1112-single pass valve second port, 1121-gas-liquid separator outlet, 1122-gas-liquid separator inlet, 2011-first water pump outlet, 2012-water condenser coolant passage inlet, 2021-heater outlet, 2022-heater inlet, 2031-second three-way valve first port, 2032-third three-way valve second port, 3-second three-way valve third port, 2041-heater core outlet, 2042-heater core inlet, 3011-second water pump outlet, 3012-second water pump inlet, 3021-second electrical pump outlet, 3022-third water pump outlet, 3062-third water pump inlet, 3062-third valve 3062-third port, 3062-third valve 3052-third port, 3052-three-way valve third port, 3062-third valve third port, 3062-three-way valve third port, 3052-three-way valve third port, 3062-port, 3052-third valve third port, 3062-third valve third port, 3052-three-way valve third port, 3052-three-port, 3091-second switching valve first port, 3092-second switching valve second port, 8000-control module, 8001-bus, 8002-input interface, 8003-memory, 8004-processor, 8005-output interface, 8101-output interface a, 8102-output interface B, 8103-output interface C, 8104-output interface D, 8105-output interface E, 8106-output interface F, 8107-output interface G, 8108-output interface H, 8109-output interface I, 8110-output interface J, 8111-output interface K, 8112-output interface L, 8113-output interface M, 8114-output interface N, 8115-output interface O, 8116-output interface P, 8117-output interface Q, 8200-connection.
Detailed Description
In order that the application may be readily understood, a more complete description of the application will be rendered by reference to the appended drawings. Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. For example, a three-way valve or a four-way valve may be replaced by a single-way valve or other reasonable valve type. Rather, these embodiments are provided so that this disclosure will be thorough and complete. Various embodiments of the present application are described below with reference to the accompanying drawings, which form a part hereof. It will be understood that ordinal numbers such as "first" and "second" used in the present application are used for distinguishing and identifying only, and do not have any other meaning, and do not denote a particular order, nor have particular relevance, unless otherwise indicated. For example, the term "first three-way valve" does not itself imply the presence of "second three-way valve", nor does the term "second on-off valve" itself imply the presence of "first on-off valve".
Fig. 1 illustrates various components and their connection relationships in a complete vehicle thermal management system 100 of the present application. The whole vehicle thermal management system 100 comprises a compressor 101, a first three-way valve 102, a water condenser 103, a first electronic expansion valve 104, an outdoor heat exchanger 105, a four-way valve 106, a second electronic expansion valve 107, a cold water machine 108, a third electronic expansion valve 109, an evaporator 110, a single-way valve 111, a gas-liquid separator 112, a first water pump 201, a heater 202, a second three-way valve 203, a heater core 204, a second water pump 301, an electric drive system 302, a third three-way valve 303, a fourth three-way valve 304, a third water pump 305, a battery system 306, a first switch valve 307, a radiator 308, a second switch valve 309, a fan 401 and a blower 402, and connecting pipelines among the components are represented by connecting wires. Wherein the compressor 101, the water condenser 103, the outdoor heat exchanger 105, the water chiller 108, the one-way valve 111, the gas-liquid separator 112, the evaporator 110, the first three-way valve 102, the first electronic expansion valve 104, the four-way valve 106, the second electronic expansion valve 107, and the third electronic expansion valve 109 constitute a heat pump refrigerant cycle, the first water pump 201, the heater 202, the heater core 204, and the second three-way valve 203 constitute a cabin heating cycle, the second water pump 301, the electric drive system 302, the third three-way valve 303, and the radiator 308 constitute an electric drive coolant cycle, and the fourth three-way valve 304, the third water pump 305, and the battery system 306 constitute a battery coolant cycle.
The selection and operation of the various components of the overall vehicle thermal management system 100 are described below. Among them, the compressor 101 is a scroll type or other type of electric compressor, which is used to evaporate and compress the refrigerant into superheated vapor and push the superheated vapor to flow in the refrigerant circulation system. The first electronic expansion valve 104, the second electronic expansion valve 107 and the third electronic expansion valve 109 may be electromagnetic expansion valves or electric expansion valves, and the degree of opening of the valve hole is controlled to achieve the temperature accuracy of the degree of superheat or the degree of supercooling. Among them, the type of water pumps used in the first water pump 201, the second water pump 301, and the third water pump 305 is an electric water pump, which pushes the coolant to flow in the coolant circulation system. The water condenser 103 and the water chiller 108 are water-side heat exchangers, and heat exchange between the cooling liquid and the refrigerant is provided. Wherein the heater 202 may be a positive temperature coefficient heater or other type of heater. The first switching valve 307, the second switching valve 309 and the single-pass valve 111 may be solenoid valve type single-pass valves or electric type single-pass valves, and control the switching of the valves. The blower 402 may be a different type of electric blower, providing not only the required air flow for the cabin coolant to exchange heat with the air, but also the cabin coolant to exchange heat with the air. The fan 401 may be a different type of fan, and provides a required air flow rate for exchanging heat between the cooling fluid of the outdoor heat exchanger 105 and the air, and for exchanging heat between the cooling fluid of the radiator 308 and the air. The four-way valve 106, the first three-way valve 102, the second three-way valve 203, the third three-way valve 303 and the fourth three-way valve 304 may be solenoid valves, or may be other types of valves, so long as they meet a specific communication mode, they may be replaced reasonably.
Connecting lines between the various components of the overall vehicle thermal management system 100 are described below. The first three-way valve first port 1021, the first three-way valve second port 1022, and the first three-way valve third port 1023 are in communication with the water condenser refrigerant passage inlet 1034, the pipe node a, and the compressor discharge 1011, respectively; the first electronic expansion valve 104 communicates with the water condenser refrigerant passage outlet 1031 and the conduit node a, respectively (i.e., the first electronic expansion valve first port 1041 communicates with the conduit node a, and the first electronic expansion valve second port 1042 communicates with the water condenser refrigerant passage outlet 1031); an outdoor heat exchanger inlet 1052 communicates with a conduit node a and an outdoor heat exchanger outlet 1051 communicates with a four-way valve fourth port 1064; the second electronic expansion valve 107 communicates with the four-way valve first port 1061 and the chiller refrigerant passage inlet 1084, respectively (i.e., the second electronic expansion valve second port 1072 communicates with the four-way valve first port 1061, and the second electronic expansion valve first port 1071 communicates with the chiller refrigerant passage inlet 1084); the third electronic expansion valve 109 communicates with the four-way valve second port 1062 and the evaporator refrigerant passage inlet 1102, respectively (i.e., the third electronic expansion valve second port 1092 communicates with the four-way valve second port 1062, and the third electronic expansion valve first port 1091 communicates with the evaporator refrigerant passage inlet 1102); the pipeline node B is respectively communicated with an evaporator refrigerant channel outlet 1101, a four-way valve third port 1063 and a pipeline node C; a chiller refrigerant passage outlet 1081 in communication with the conduit node C; the single-pass valve 111 communicates with the pipe node C and the gas-liquid separator inlet 1122, respectively (i.e., the single-pass valve second port 1112 communicates with the pipe node C, and the single-pass valve first port 1111 communicates with the gas-liquid separator inlet 1122); the compressor suction port 1012 communicates with the gas-liquid separator outlet 1121; the first water pump water outlet 2011 is communicated with the water condenser cooling liquid channel inlet 1033; the first water pump inlet 2012 communicates with the heater core outlet 2041; the water condenser coolant passage outlet 1032 communicates with the heater inlet 2022; the pipe node D communicates with the heater core inlet 2042, the second three-way valve first port 2031, and the second on-off valve first port 3091, respectively; the heater outlet 2021 communicates with the second three-way valve third port 2033; the pipeline node I is respectively communicated with the pipeline node H, a second port 2032 of the second three-way valve and a water inlet 3012 of the second water pump; the second water pump water outlet 3011 is communicated with an electric drive system inlet 3022; the pipeline node E is respectively communicated with a radiator first port 3081, a third three-way valve third port 3033 and an electric drive system outlet 3021; the third three-way valve second port 3032 is communicated with a pipeline node H; the pipeline node F is respectively communicated with a third three-way valve first port 3031, a pipeline node J and a fourth three-way valve third port 3043; the pipe joint J communicates with the pipe joint F, the radiator second port 3082, and the second on-off valve second port 3092, respectively; the cooling liquid inlet 1083 of the chiller is communicated with the second port 3042 of the fourth three-way valve; the third water pump water inlet 3052 is communicated with the fourth three-way valve first port 3041; the third water pump outlet 3051 communicates with the battery system inlet 3062; the pipeline node G is respectively communicated with a cooling liquid outlet 1082 of the water chiller, a battery system outlet 3061 and a second port 3072 of the first switch valve; the first on-off valve first port 3071 communicates with the pipe node H.
FIG. 2 is a schematic diagram of the communication connection between the control module of FIG. 1 and the various actuators of the overall thermal management system. As shown in fig. 2, the control module 8000 determines the operating states of various actuators of the overall thermal management system 100. Seventeen interfaces of the control module 8000 output interfaces 8005: the output ports a8101, B8102, C8103, D8104, E8105, F8106, H8108, I8109, J8110, K8111, L8112, M8113, N8114, O8115, P8116, Q8117, and G8107 are communicatively connected to the compressor 101, the first three-way valve 102, the first electronic expansion valve 104, the four-way valve 106, the second electronic expansion valve 107, the third electronic expansion valve 109, the first water pump 201, the heater 202, the second three-way valve 203, the second water pump 301, the third three-way valve 303, the fourth three-way valve 304, the third water pump 305, the first switch valve 307, the second switch valve 309, the fan 401, and the blower 402, respectively. The control module 8000 controls the flow of the refrigerant by controlling the compressor 101; the control module 8000 controls the coolant flow by controlling the first water pump 201, the second water pump 301, and the third water pump 305; the control module 8000 controls the air flow by controlling the fan 401 and the blower 402; the control module 8000 controls the heating power of the heater 202; the control module controls the communication, closing or designated flow state of the fluid by controlling the first electronic expansion valve 104, the second electronic expansion valve 107, the third electronic expansion valve 109, the four-way valve 106, the first switching valve 307, the second switching valve 309, the first three-way valve 102, the second three-way valve 203, the third three-way valve 303 and the fourth three-way valve 304, wherein the opening degree of the valve hole when the first electronic expansion valve 104, the second electronic expansion valve 107 and the third electronic expansion valve 109 are partially opened is related to the supercooling or superheating control of the outdoor heat exchanger 105, the cold water machine 108 and the evaporator 110, respectively; the control process is the prior art. The control logic of the whole vehicle thermal management system is simple and clear, and is easy to implement.
Fig. 3 is a schematic internal structural view of the control module shown in fig. 2. As shown in fig. 3, the control module 8000 of the entire thermal management system 100 includes a bus 8001, an input interface 8002, a memory 8003, a processor 8004, and an output interface 8005, and the input interface 8002, the memory 8003, the processor 8004, and the output interface 8005 are all connected to the bus 8001 to perform signal transmission. Specifically, the memory 8003 is used to store programs, instructions, and data, and the processor 8004 reads programs, instructions, and data from the memory 8003, and can write data to the memory 8003. By executing the program and instructions read by the memory 8003, the processor 8004 realizes signal exchange through the input interface 8002 and the output interface 8005. As shown in fig. 3, the control module 8000 input interface 8002 receives an operation request and other operation parameters of the overall vehicle thermal management system 100 via a connection 8200. By executing programs and instructions in processor 8003, processor 8004 controls the operation of overall thermal management system 100. Specifically, the control module 8000 may receive a signal for controlling an operation request or other components of the whole vehicle thermal management system 100 through the input interface 8002, and send a control signal to each controlled component through the output interface 8005, so that the whole vehicle thermal management system 100 may operate in a designated operation mode and may switch between different modes.
Fig. 4-9 are system diagrams of the overall thermal management system 100 shown in fig. 1 to illustrate fluid flow conditions for operation of the overall thermal management system 100 in different modes of operation, wherein the open dashed arrows indicate the flow direction and flow path of the refrigerant, the bold solid arrows indicate the flow direction and flow path of the coolant, and the other solid arrows indicate no fluid flow. The various modes of operation shown in figures 4-9 are described in detail below.
Fig. 4 is a system diagram of the entire vehicle thermal management system 100 shown in fig. 1 in a heat pump cabin heating mode. In a low temperature environment, the overall thermal management system 100, upon receipt of a cabin heating command (or the control module 8000 automatically generates a cabin heating command), may absorb heat from the environment and transfer to the cabin via a heat pump refrigerant cycle. The control module 8000 controls the first three-way valve second port 1022 to be closed, the first three-way valve first port 1021 and the first three-way valve third port 1023 to be opened, the four-way valve third port 1063 and the four-way valve fourth port 1064 to be opened, the four-way valve first port 1061 and the four-way valve second port 1062 to be closed, the first electronic expansion valve 104 to be partially opened, the second electronic expansion valve 107 and the third electronic expansion valve 109 to be closed, the second three-way valve first port 2031 and the second three-way valve third port 2033 to be opened, the second three-way valve second port 2032 to be closed, the compressor 101 refrigerant flow to be controlled, the first water pump 210 cooling liquid flow to be controlled, the air flow of the fan 401 and the blower 402 to be controlled, and the heater 202 to heat power to realize the operation mode of the heat pump heating cabin. As shown in fig. 4, the high-temperature and high-pressure refrigerant flowing out of the compressor discharge port 1011 passes through the refrigerant passage of the water condenser 103 after passing through the first three-way valve third port 1023 and the first three-way valve first port 1021, and is condensed from a gas state to a liquid state by the cooling effect of the cooling liquid. The high-temperature and high-pressure refrigerant is depressurized and increased in volume through the partially opened first electronic expansion valve 104 to form a low-temperature and low-pressure liquid-mist mixture, which is introduced into the outdoor heat exchanger 105, and at this time, the outdoor heat exchanger 105 functions as an evaporator, absorbs a large amount of heat in the ambient air to make the refrigerant become gaseous, and reaches the pipe node B through the four-way valve fourth port 1064 and the four-way valve third port 1063, and then sequentially passes through the pipe node C, the one-way valve 111, and then flows into the gas-liquid separator inlet 1122, and the gas-liquid separator 112 separates the liquid refrigerant from the gaseous refrigerant. The compressor inlet 1012 sucks in gaseous refrigerant from the gas-liquid separator outlet 1121 and starts the operation of the next refrigerant cycle. On the other hand, the low-temperature cooling liquid pumped out by the first water pump water outlet 2011 passes through the cooling liquid channel of the water condenser 103, absorbs the heat released by the refrigerant to generate high-temperature cooling liquid, and then flows into the second port 2042 of the heater core after passing through the heater 202, the third port 2033 of the second three-way valve, the first port 2031 of the second three-way valve and the pipeline node D in sequence, and when passing through the heater core 204, the high-temperature cooling liquid releases heat to the air blown out by the blower 402 to heat the cabin, and is changed back to the low-temperature cooling liquid at the outlet 2041 of the heater core 204, and is sucked by the water inlet 2012 of the first water pump to form the cabin heating cooling liquid circulation.
Fig. 5 is a system diagram of the whole vehicle thermal management system 100 shown in fig. 1 in a heat pump (electric drive waste heat recovery) heating cabin and electric drive waste heat recovery mode. When the overall thermal management system 100 recognizes that the outdoor heat exchanger is frosted and affects the efficiency of the heat pump, the overall thermal management system will enter a defrost mode. Furthermore, if the temperature of the coolant at the electric drive system outlet 3021 is high, the electric drive waste heat can be used to defrost the outdoor heat exchanger while heating the cabin. The control module 8000 controls the first three-way valve second port 1022 to be closed, the first three-way valve first port 1021 and the first three-way valve third port 1023 to be opened, the four-way valve first port 1061 and the four-way valve fourth port 1064 to be opened, the four-way valve second port 1062 and the four-way valve third port 1063 to be closed, the first electronic expansion valve 104 to be fully opened, the second electronic expansion valve 107 to be partially opened, the third electronic expansion valve 109 to be closed, the first switch valve 307 to be opened, the second switch valve 309 to be closed, the second three-way valve second port 2032 to be closed, the second three-way valve first port 2031 and the second three-way valve third port 2033 to be opened, the third three-way valve second port 3032 to be closed, the third three-way valve first port 3031 and the third three-way valve third port 3033 to be opened, the fourth three-way valve first port 3041 to be closed, the fourth three-way valve second port 3042 and the fourth three-way valve third port 3043 to be opened, the compressor 101 to be opened, the first water pump 201 and the second water pump to be opened, and the blower fan to be heated by the residual heat pump to realize the purpose of heating by the cabin air flow of the cooling liquid and the blower fan 401. As shown in fig. 5, the high temperature and high pressure refrigerant flowing out of the compressor discharge port 1011 flows into the refrigerant passage of the water condenser 103 through the first three-way valve third port 1023 and the first three-way valve first port 1021, is partially condensed from a gas state to a liquid state by the cooling effect of the cooling liquid, and enters the outdoor heat exchanger 105 in a state of high temperature and high pressure through the fully opened first electronic expansion valve 104 to radiate heat to the environment, thereby defrosting the fins and coils of the outdoor heat exchanger 105. In this mode of operation, the outdoor heat exchanger 105 functions as a condenser. The refrigerant flows through the four-way valve fourth port 1064 and the four-way valve first port 1061, is depressurized and increases in volume while passing through the partially opened second electronic expansion valve 107, forms a low-temperature low-pressure liquid-mist mixture, enters the chiller 108 to absorb heat from the cooling liquid, flows through the pipe node C from the chiller refrigerant passage outlet 1081 and the one-way valve 111, and then is separated into a liquid refrigerant and a gaseous refrigerant by the gas-liquid separator 112. The compressor inlet 1012 sucks in gaseous refrigerant from the gas-liquid separator outlet 1121 and starts the operation of the next refrigerant cycle. In another aspect, the cooling fluid flows from the outlet 3021 of the electric drive system through the pipe node E, the third three-way valve third port 3033, the first three-way valve port 3031, the pipe node F, the fourth three-way valve third port 3043, and the fourth three-way valve second port 3042, and then enters the cooling fluid inlet 1083 of the chiller, and the released heat of the high-temperature cooling fluid is absorbed by the refrigerant and then returns to the inlet 3022 of the electric drive system through the pipe node G, the first switch valve 307, the pipe node E, the pipe node I, and the second water pump 301, thereby forming a cooling fluid cycle for recovering the residual heat of the electric drive.
Fig. 6 is a system diagram of the whole vehicle thermal management system 100 shown in fig. 1 in a cabin heating mode using electric drive waste heat. When the overall thermal management system 100 recognizes that the heat pump efficiency is low and the temperature of the coolant at the electric drive system outlet 3021 is high, the electric drive waste heat can be directly utilized to heat the cabin. The control module 8000 controls the third three-way valve second port 3032 to be closed, the third three-way valve first port 3031 and the third three-way valve third port 3033 to be opened, the first switch valve 307 to be closed, the second switch valve 309 to be opened, the second three-way valve first port 2031 to be closed, the second three-way valve second port 2032 and the second three-way valve third port 2033 to be opened, the first electronic expansion valve 104, the second electronic expansion valve 107 and the third electronic expansion valve 109 to be closed, the refrigerant flow of the compressor 101 to control the coolant flow of the first water pump 201 and the second water pump 301, and the air flow of the fan 401 and the blower 402 to electrically drive the residual heat to heat the operation mode of the cabin. As shown in fig. 6, the refrigerant cycle does not operate. The high-temperature cooling liquid flows from the electric drive system outlet 3021 through the pipeline node E, the third three-way valve third port 3033 and the third three-way valve first port 3031, the pipeline node F, the pipeline node J, the second switch valve 309, the pipeline node D, the heater core 204, the first water pump 201, the water condenser 103, the heater 202, the second three-way valve third port 2033 and the second three-way valve second port 2032, the pipeline node I and the second water pump 201, and then flows back to the electric drive system inlet 3022, so that the cooling liquid circulation of the electric drive waste heat heating cabin is formed.
Fig. 7 is a system diagram of the whole vehicle thermal management system 100 shown in fig. 1 in a mode of heating a battery using electric drive waste heat. When the temperature of the cooling fluid at the outlet 3021 of the electric drive system is too high, the electric drive waste heat recovery may be used to heat the battery. The control module 8000 controls the third three-way valve second port 3032 to be closed, the third three-way valve first port 3031 and the third three-way valve third port 3033 to be opened, the fourth three-way valve second port 3042 to be closed, the fourth three-way valve first port 3041 and the fourth three-way valve third port 3043 to be opened, the first switch valve 307 to be opened, the second switch valve 309, the first three-way valve 102, the second three-way valve 203, the four-way valve 106, the first electronic expansion valve 104, the second electronic expansion valve 107 and the third electronic expansion valve 109 to be closed, the refrigerant flow of the compressor 101 to be controlled, the cooling liquid flow of the second water pump 301 to be controlled, and the air flow of the fan 401 to be controlled, so that the purpose of electrically driving the waste heat to heat the battery is achieved. As shown in fig. 7, the high-temperature cooling liquid flows from the electric drive system outlet 3021 through the pipeline node E, the third three-way valve third port 3033, the third three-way valve first port 3031, the pipeline node F, the fourth three-way valve third port 3043, the fourth three-way valve first port 3041, the third water pump 305, and then flows into the battery system inlet 3062, so as to achieve the purpose of heating the battery. The cooling liquid after heating the battery flows out through the battery system outlet 3061, flows into the electric drive system inlet 3022 after passing through the pipe node G, the first switch valve 307, the pipe node H, the pipe node I and the second water pump 301, and forms a cooling liquid circulation of the electric drive waste heat heating battery.
Fig. 8 is a system diagram of the entire thermal management system 100 of fig. 1 in cabin air conditioning cooling and electric drive battery radiator cooling mode. The entire car thermal management system 100 receives the cabin air conditioning refrigeration command (or the control module 8000 automatically generates the cabin refrigeration command) and the refrigerant cycle refrigerates the cabin. When the environment temperature is suitable and the heat generated by the battery is not large, the battery and the electric drive can simultaneously utilize the radiator to radiate heat, so that the load of the compressor is reduced, and the function of reducing the energy consumption of the compressor is achieved. The control module 8000 controls the first three-way valve first port 1021 to be closed, the first three-way valve second port 1022 and the first three-way valve third port 1023 to be opened, the four-way valve first port 1061 and the four-way valve third port 1063 to be closed, the four-way valve second port 1062 and the four-way valve fourth port 1064 to be opened, the third electronic expansion valve 109 to be partially opened, the first electronic expansion valve 104 and the second electronic expansion valve 107 to be closed, the second three-way valve 203 and the third three-way valve 303 to be closed, the fourth three-way valve second port 3042 to be closed, the fourth three-way valve first port 3041 and the fourth three-way valve third port 3043 to be opened, the first switch valve 307 to be opened, the second switch valve 309 to be closed, the refrigerant flow of the compressor 101 to be controlled, the air flow of the second water pump 201 and the third water pump 301 to be controlled, and the air flow of the fan 401 and the blower 402 to be opened, so as to achieve the purposes of cabin refrigeration, electric driving and battery heat dissipation. As shown in fig. 8, the high temperature and high pressure refrigerant flowing out of the compressor discharge port 1011 flows into the refrigerant passage of the outdoor heat exchanger 105 through the first three-way valve third port 1023, the first three-way valve second port 1022, and the pipe node a, is partially condensed from a gas state to a liquid state by the cooling action of the cooling liquid, is depressurized and increased in volume through the partially opened third electronic expansion valve 109 after passing through the four-way valve fourth port 1064 and the four-way valve second port 1062, forms a low temperature and low pressure liquid mist mixture, which absorbs the heat of the air blown out from the blower 402, and is reduced in humidity by the air cooling. The refrigerant sequentially flows through the pipe node B, the pipe node C, and the one-way valve 111 from the evaporator outlet 1101, and then the liquid refrigerant and the gaseous refrigerant are separated by the gas-liquid separator 112. The compressor inlet 1012 sucks in gaseous refrigerant from the gas-liquid separator outlet 1121 and starts the operation of the next refrigerant cycle. On the other hand, the third three-way valve 303 is closed, the coolant pumped from the battery system outlet 3061 flows from the pipe node G, the first switch valve 307, the pipe node H, the pipe node I, and the first water pump 301 and through the electric drive system 302, is collected at the pipe node E, after which the high-temperature coolant flows to the radiator 308, and the high-temperature coolant of the radiator first port 3081 exchanges heat with air and cools down under the wind speed control of the fan 401, forming a low-temperature coolant at the radiator second port 3082. The low-temperature cooling liquid sequentially passes through the pipeline node J, the pipeline node F, the third port 3043 of the fourth three-way valve, the first port 3041 of the fourth three-way valve and the third water pump 305 and then flows into the battery system inlet 3062, so that cooling liquid circulation of electric drive and battery radiator cooling is formed.
Fig. 9 is a system diagram of the entire thermal management system 100 of fig. 1 in cabin air conditioning cooling and electric drive radiator cooling and battery chiller cooling modes. When the air temperature is high, the battery high-temperature cooling liquid cannot exchange heat with the ambient air through the radiator, and therefore needs to be cooled through a water chiller. The control module 8000 controls the first three-way valve second port 1022 to be closed, the first three-way valve first port 1021 and the first three-way valve third port 1023 to be opened, the four-way valve third port 1063 to be closed, the four-way valve first port 1061, the four-way valve second port 1062 and the four-way valve fourth port 1064 to be opened, the first electronic expansion valve 104 to be closed, the second electronic expansion valve 107 and the third electronic expansion valve 109 to be partially opened, the second three-way valve 303 to be closed, the third three-way valve third port 3033 to be closed, the third three-way valve first port 3031 and the third three-way valve second port 3032 to be opened, the fourth three-way valve third port 3043 to be closed, the fourth three-way valve first port 3041 and the fourth three-way valve second port 3042 to be opened, the first switch valve 307 and the second switch valve 309 to be closed, the refrigerant flow of the compressor 101 to be controlled, the second water pump 301 and the third water pump 305 to be cooled to be partially opened, the air flow of the fan 401 and the blower 402 to be cooled, and the air flow of the high temperature environment to be cooled, the electric cabin radiator and the battery to be cooled. As shown in fig. 9, unlike the refrigerant cycle of fig. 8, the four-way valve first port 1061, the four-way valve second port 1062, and the four-way valve fourth port 1064 are opened, and the refrigerant enters the partially opened second electronic expansion valve 107 in addition to the partially opened third electronic expansion valve 109, thereby simultaneously achieving a low temperature and low pressure state in the refrigerant passage of the chiller 108 and the evaporator 110, and achieving the effect of cooling the battery system and cabin cooling. The refrigerant flows from the evaporator outlet 1101 into the gas-liquid separator 112 via the pipe node B, the pipe node C, and the one-way valve 111. The chiller refrigerant outlet 1081 passes through the pipe node C and the one-way valve 111 and flows into the gas-liquid separator 112. The gas-liquid separator 112 separates liquid refrigerant and gaseous refrigerant. The compressor inlet 1012 sucks in gaseous refrigerant from the gas-liquid separator outlet 1121 and starts the operation of the next refrigerant cycle. On the other hand, the high-temperature cooling liquid flows from the outlet of the battery system 306 into the cooling liquid channel 1082 of the chiller through the pipe node G, exchanges heat with the refrigerant in the chiller 108 and forms low-temperature cooling liquid at the cooling liquid channel outlet 1083 of the chiller, and the low-temperature cooling liquid flows back to the inlet 3062 of the battery system after passing through the second port 3042 of the fourth four-way valve, the first port 3041 of the fourth four-way valve and the third water pump 305 in sequence, thereby forming the cooling cycle of the chiller of the battery system. The electrically driven radiator cooling is the same as the mode of operation shown in fig. 8 and will not be described here in detail.
The examples are preferred embodiments of the present invention, but the present invention is not limited to the above-described embodiments, and any obvious modifications, substitutions or variations that can be made by one skilled in the art without departing from the spirit of the present invention are within the scope of the present invention.

Claims (10)

1. A thermal management system for a blade electric vehicle, comprising:
the first branch comprises a compressor (101), a first three-way valve (102), a water condenser (103), a first electronic expansion valve (104), an outdoor heat exchanger (105), a four-way valve (106), a second electronic expansion valve (107), a water chiller (108), a single-pass valve (111) and a gas-liquid separator (112), wherein the third electronic expansion valve (109) and the evaporator (110) are connected between the other two ports of the four-way valve (106), the evaporator (110) is also communicated with the single-pass valve (111), and one port of the first three-way valve (102) is communicated between the first electronic expansion valve (104) and the outdoor heat exchanger (105) through a pipeline;
the second branch comprises a first water pump (201), a heater core (204), a second three-way valve (203), a heater (202) and a water condenser (103) which are sequentially communicated;
the third branch comprises a second water pump (301), an electric drive system (302), a third three-way valve (303), a fourth three-way valve (304), a third water pump (305), a battery system (306) and a first switching valve (307) which are sequentially communicated, wherein the third three-way valve (303) is further communicated with the first switching valve (307), the fourth three-way valve (304) is further communicated with the water chiller (108), the battery system (306) and the first switching valve (307) are communicated with the water chiller (108) through a pipeline, the second water pump (301) and the first switching valve (307) are communicated with one port of the second three-way valve (203) through a pipeline, and the pipeline node between the electric drive system (302) and the third three-way valve (303) and the pipeline node between the third three-way valve (303) and the fourth three-way valve (304) are communicated through a radiator (308), and the radiator (308) is further communicated with the heater core (204) and the second three-way valve (203) through a pipeline.
2. The electric vehicle thermal management system of claim 1, characterized in that a fan (401) is provided at the radiator (308), and a blower (402) is provided at the evaporator (110).
3. The electric only vehicle thermal management system of claim 2, wherein the compressor (101), the first three-way valve (102), the first electronic expansion valve (104), the four-way valve (106), the second electronic expansion valve (107), the third electronic expansion valve (109), the first water pump (201), the heater (202), the second three-way valve (203), the second water pump (301), the third three-way valve (303), the fourth three-way valve (304), the third water pump (305), the first switch valve (307), the second switch valve (309), the fan (401), and the blower (402) are all communicatively connected to the output interface of the control module.
4. A control method based on a heat management system of a pure electric vehicle according to any one of claims 1-3, characterized in that the control module (8000) controls the refrigerant flow by controlling the compressor (101), the control module (8000) controls the coolant flow by controlling the first water pump (201), the second water pump (301) and the third water pump (305), the control module (8000) controls the air flow by controlling the fan (401) and the blower (402), the control module (8000) controls the heating power of the heater (202), the control module (8000) controls the communication, closing or appointed flowing state of fluid through controlling the first electronic expansion valve (104), the second electronic expansion valve (107), the third electronic expansion valve (109), the four-way valve (106), the first switching valve (307), the second switching valve (309), the first three-way valve (102), the second three-way valve (203), the third three-way valve (303) and the fourth three-way valve (304), so as to realize a heat pump cabin heating mode, a heat pump cabin heating and electric driving waste heat recovery mode, an electric driving waste heat cabin heating mode, an electric driving waste heat heating battery mode, a cabin air conditioner refrigerating and electric driving battery radiator cooling mode, a cabin air conditioner refrigerating and battery chiller refrigerating mode and an electric driving radiator cooling mode of the whole vehicle heat management system.
5. The control method according to claim 4, wherein the control module (8000) controls the second port of the first three-way valve (102) to be closed, the first port and the third port to be opened, the third port and the fourth port of the four-way valve (106) to be opened, the first port and the second port to be closed, the first electronic expansion valve (104) to be partially opened, the second electronic expansion valve (107) and the third electronic expansion valve (109) to be closed, the first port and the third port of the second three-way valve (203) to be opened, the second port to be closed, the refrigerant flow of the compressor (101) to be controlled, the coolant flow of the first water pump (210) to be controlled, the air flow of the fan (401) and the blower (402) to be controlled, and the heating power of the heater (202) to be controlled when the heat pump is in the cabin heating mode.
6. The control method according to claim 4, wherein the control module (8000) controls the second port of the first three-way valve (102) to be closed, the first port and the third port to be opened, the first port and the fourth port of the four-way valve (106) to be opened, the second port and the third port to be closed, the first electronic expansion valve (104) to be fully opened, the second electronic expansion valve (107) to be partially opened, the third electronic expansion valve (109) to be closed, the first switch valve (307) to be opened, the second switch valve (309) to be closed, the second port of the second three-way valve (203) to be closed, the first port and the third port to be opened, the second port of the third three-way valve (303) to be closed, the first port and the third port to be opened, the refrigerant flow of the compressor (101) to be fully opened, the first water pump (201) and the second water pump (301) to be partially opened, the refrigerant flow of the fan (401) to be controlled, and the air flow of the fan (402) to be opened when the heat pump is in the heating cabin.
7. The control method according to claim 4, wherein the control module (8000) controls the second port of the third three-way valve (303) to be closed, the first port and the third port to be opened, the first switch valve (307) to be closed, the second switch valve (309) to be opened, the first port of the second three-way valve (203) to be closed, the second port and the third port to be opened, the first electronic expansion valve (104), the second electronic expansion valve (107) and the third electronic expansion valve (109) to be closed, controls the refrigerant flow of the compressor (101), controls the coolant flow of the first water pump (201) and the second water pump (301), and controls the air flow of the fan (401) and the blower (402) when the electric-driven waste heat heating cabin mode.
8. The control method according to claim 4, wherein the control module (8000) controls the second port of the third three-way valve (303) to be closed, the first port and the third port to be opened, the second port of the fourth three-way valve (304) to be closed, the first port and the third port to be opened, the first switch valve (307) to be opened, the second switch valve (309), the first three-way valve (102), the second three-way valve (203), the four-way valve (106), the first electronic expansion valve (104), the second electronic expansion valve (107) and the third electronic expansion valve (109) to be closed, controls the refrigerant flow of the compressor (101), the coolant flow of the second water pump (301) to be opened, and the air flow of the fan (401) to be controlled, when the electric-driven waste heat heating battery mode is performed.
9. The control method according to claim 4, wherein the control module (8000) controls the first port of the first three-way valve (102) to be closed, the second port to be opened, the third electronic expansion valve (109) to be partially opened, the first electronic expansion valve (104) to be closed, the second electronic expansion valve (107) to be closed, the second three-way valve (203) to be closed, the third three-way valve (303) to be closed, the fourth three-way valve (304) to be closed, the first port to be opened, the first switch valve (307) to be opened, the second switch valve (309) to be closed, the refrigerant flow of the compressor (101) to be controlled, the second water pump (201) to be opened, the third water pump (301) to be opened, the air flow of the fan (401) to be blown by the blower (402) to be closed, when in the cabin air conditioner cooling and the electric battery radiator cooling mode.
10. The control method according to claim 4, wherein the control module (8000) controls the second port of the first three-way valve (102) to be closed, the first port and the third port to be opened, the third port of the four-way valve (106) to be closed, the first port, the second port and the fourth port to be opened, the first electronic expansion valve (104) to be closed, the second electronic expansion valve (107) and the third electronic expansion valve (109) to be partially opened, the second three-way valve (303) to be closed, the third port of the third three-way valve (303) to be closed, the first port and the second port to be opened, the third port of the fourth three-way valve (303) to be closed, the first port and the second port of the fourth three-way valve (304) to be opened, the first switch valve (307) and the second switch valve (309) to be closed, the refrigerant flow of the compressor (101) to be controlled, the cooling liquid flow of the second water pump (301) and the third water pump (305) to be partially opened, and the air flow rate of the fan (401) to be controlled.
CN202310773287.0A 2023-06-27 2023-06-27 Thermal management system of pure electric vehicle and control method thereof Pending CN116653553A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310773287.0A CN116653553A (en) 2023-06-27 2023-06-27 Thermal management system of pure electric vehicle and control method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310773287.0A CN116653553A (en) 2023-06-27 2023-06-27 Thermal management system of pure electric vehicle and control method thereof

Publications (1)

Publication Number Publication Date
CN116653553A true CN116653553A (en) 2023-08-29

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Application Number Title Priority Date Filing Date
CN202310773287.0A Pending CN116653553A (en) 2023-06-27 2023-06-27 Thermal management system of pure electric vehicle and control method thereof

Country Status (1)

Country Link
CN (1) CN116653553A (en)

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