CN111231602A - New energy automobile battery thermal management system and method based on heat pipe and heat pump air conditioner - Google Patents

New energy automobile battery thermal management system and method based on heat pipe and heat pump air conditioner Download PDF

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Publication number
CN111231602A
CN111231602A CN202010021154.4A CN202010021154A CN111231602A CN 111231602 A CN111231602 A CN 111231602A CN 202010021154 A CN202010021154 A CN 202010021154A CN 111231602 A CN111231602 A CN 111231602A
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heat pipe
heat
valve
refrigerant
external
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陈瑶
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University of Shanghai for Science and Technology
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University of Shanghai for Science and Technology
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    • 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
    • B60H1/32—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
    • 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
    • B60H1/00321—Heat exchangers for air-conditioning devices
    • B60H1/00342—Heat exchangers for air-conditioning devices of the liquid-liquid type
    • 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
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
    • 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
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6552—Closed pipes transferring heat by thermal conductivity or phase transition, e.g. heat pipes
    • 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
    • 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
    • B60H2001/00307—Component temperature regulation using a liquid flow
    • 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
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K2001/003—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units
    • B60K2001/005—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units the electric storage means
    • 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
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K2001/008—Arrangement or mounting of electrical propulsion units with means for heating the electrical propulsion units
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • 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
    • 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
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/88—Optimized components or subsystems, e.g. lighting, actively controlled glasses

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

Abstract

The invention provides a new energy automobile battery thermal management system and a new energy automobile battery thermal management method based on a heat pipe and a heat pump air conditioner. The heat pump air conditioning system supplies cold and heat to the passenger compartment and is used for providing cold and heat required by the thermal management of the battery box; the heat pipe system is used for efficiently conducting cold and heat to the battery box. When the battery needs to be cooled, the system operates in a refrigeration mode, and the refrigeration quantity provided by the refrigerant or the external air is circularly transmitted to the battery box by the heat pipe; when the battery needs to be heated, the system operates in a heating mode, and heat provided by the refrigerant is transferred to the battery box through a heat pipe cycle. The refrigeration and heating modes of the system are switched by adjusting the internal pipeline of a four-way reversing valve of the heat pump system and closing or opening related refrigerant valves and heat pipe valves in the system. The system has the characteristics of high heat conduction rate, high efficiency, good temperature uniformity and strong energy conservation, and has wide application prospect.

Description

New energy automobile battery thermal management system and method based on heat pipe and heat pump air conditioner
Technical Field
The invention relates to the field of design and manufacture of a new energy automobile thermal management system, in particular to a new energy automobile battery thermal management system and method based on a heat pipe and a heat pump air conditioner.
Background
In recent years, the problem of environmental pollution is becoming more serious, and the excessive exhaust of automobile is a big problem of urban environmental pollution. New energy automobiles (mainly electric automobiles) use clean energy, have the characteristic of extremely low pollutant emission, and are developed rapidly as an effective way for replacing traditional fuel oil automobiles. However, a series of problems still need to be solved in the popularization process of the new energy automobile, wherein the reliability and endurance problems of the power battery are key issues concerned by the new energy automobile industry.
High temperature, low temperature and temperature inequality all can produce the influence to power battery's performance, compare in traditional fuel automobile, the change of power mode has proposed higher thermal management demand to new energy automobile. When the temperature of the power battery is too low, for example, in the cold winter in the north, it needs to be heated to maintain a normal operating temperature. In the existing new energy automobile, the power battery is generally heated by the PTC, and the PTC not only needs to heat the power battery, but also needs to supply heat to the whole automobile (such as heating air in a passenger compartment), and the electric quantity of the PTC is provided by the power battery itself. The PTC can greatly reduce the energy reserve of the power battery due to the demand of the PTC for the electric quantity, and the endurance problem of the new energy automobile is seriously influenced. Therefore, it is necessary to develop a more energy-saving battery heating method.
On the other hand, the temperature of the new energy automobile is often too high during charging and operation in summer, and cooling treatment is needed to ensure normal operation of the battery. The existing new energy automobile battery cooling mode mainly comprises wind cooling and liquid cooling. The air cooling mode is adopted in the day-series vehicle, the cooling capacity for cooling the battery is generally from an air conditioning system of the vehicle, the cooling capacity needs to be conveyed to the battery through an additional air duct and equipment, and the provided cooling capacity is very limited; the liquid cooling is divided into water cooling and refrigerant direct cooling, and is realized by installing an additional cold plate (the cooling liquid is water or refrigerant) in the battery box, wherein the cold water mainly comes from a water tank refrigerator, the refrigerant is obtained by shunting the automobile air conditioning system, and the liquid cooling mode has the defects of poor temperature uniformity and easy liquid leakage.
In summary, in order to improve the performance of the thermal management system of the new energy automobile, it is an effective way to find a simple and efficient battery thermal management system or technology without changing the size of the equipment space or adding extra weight. The heat pipe technology has the characteristics of passive operation, no extra energy consumption, high equivalent thermal conductivity, good temperature uniformity, hollow structure, light weight, capability of reasonably utilizing a natural cold source to achieve the purpose of energy conservation and the like, and is very suitable for being introduced into a battery thermal management system of a new energy automobile.
Disclosure of Invention
The invention aims to provide a new energy automobile battery thermal management system and a new energy automobile battery thermal management method based on a heat pipe and a heat pump air conditioner.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: new energy automobile battery thermal management system based on heat pipe and heat pump air conditioner, it includes: the heat pump air conditioning system and the heat pipe circulating system are used for conveying cold and heat to the heat pipe circulation in a refrigerating mode and a heating mode;
the heat pump air-conditioning system comprises a compressor, a four-way reversing valve connected to the compressor, a heat pump external heat exchanger connected to the four-way reversing valve, an electronic expansion valve arranged between the heat pump external heat exchanger, a first three-way valve connected to the electronic expansion valve, a heat pump internal heat exchanger connected to the first three-way valve, and a second three-way valve connected to the heat pump internal heat exchanger and the four-way reversing valve;
the heat pipe circulating system comprises a heat pipe internal heat exchange section arranged in the battery box, a first heat pipe external heat exchanger connected to the heat pipe internal heat exchange section through a first heat pipe valve, and a second heat pipe external heat exchanger connected to the heat pipe internal heat exchange section through a third heat pipe valve, wherein the other end of the second heat pipe external heat exchanger is connected to the heat pipe internal heat exchange section through a fourth heat pipe valve, a connecting pipeline of the fourth heat pipe valve and the heat pipe internal heat exchange section is connected to the first heat pipe external heat exchanger through a second heat pipe valve, and the first heat pipe external heat exchanger is provided with an air channel for conveying external air through an external fan;
a first refrigerant valve is arranged on a refrigeration pipeline between the first three-way valve and the first heat pump external heat exchanger; a second refrigerant valve is arranged on a pipeline between the refrigerant flow passage outlet of the first heat pump external heat exchanger and the second three-way valve; and a third refrigerant valve is arranged at the refrigerant flow channel inlet of the second heat pipe external heat exchanger, and a fourth refrigerant valve is arranged at the refrigerant flow channel outlet.
The working mode of the new energy automobile battery thermal management system comprises a refrigeration mode and a heating mode;
when the system is in a refrigeration mode, the first heat pipe external heat exchanger is used as a condensation section of heat pipe circulation, the heat pipe internal heat exchange section is used as an evaporation section of heat pipe circulation, the installation position of the first heat pipe external heat exchanger is higher than that of the heat pipe internal heat exchange section, and the included angle between the heat pipe and the horizontal plane for connecting the first heat pipe external heat exchanger and the heat pipe internal heat exchange section is more than 30 degrees; at the moment, the first heat pipe valve and the second heat pipe valve are in an open state, and the third heat pipe valve and the fourth heat pipe valve are in a closed state;
when the system is in a heating mode, the heat exchange section inside the heat pipe is used as a condensation section of heat pipe circulation, the second heat pipe external heat exchanger is used as an evaporation section of heat pipe circulation, the installation position of the heat exchange section inside the heat pipe 31 is higher than that of the second heat pipe external heat exchanger, and the included angle between the heat pipe and the horizontal plane connecting the heat pipe and the second heat pipe external heat exchanger is larger than 30 degrees; at this time, the first heat pipe valve and the second heat pipe valve are in a closed state, and the third heat pipe valve and the fourth heat pipe valve are in an open state.
Further, the refrigeration mode has two operation modes;
when the outdoor environment temperature is low, a first refrigerant valve and a second refrigerant valve on a heat pump circulating refrigerant pipeline are closed, and the cooling capacity required by battery cooling is completely supplied to the first heat pipe external heat exchanger by external air;
when the outdoor temperature is high, the first refrigerant valve and the second refrigerant valve on the refrigerant pipeline of the heat pump cycle are opened, the third refrigerant valve and the fourth refrigerant valve are closed, and the cooling capacity required by the battery cooling is supplied to the first heat pipe external heat exchanger by the external air and the heat pump refrigerant at the same time.
Further, the external fan of the new energy automobile battery heat management system transmits natural cold energy in the environment to the first external heat exchanger through the air duct, and then the cold energy is transmitted to the heat exchange section in the heat pipe through the heat pipe, so that the battery in the battery box is cooled.
Furthermore, a gravity type heat pipe is adopted in the new energy automobile battery thermal management system, and the flowing driving force of working media in the heat pipe is gravitational potential energy and density difference.
The heat pump air-conditioning system realizes the switching of air-conditioning refrigeration and heating modes through the switching of the internal pipelines of the four-way reversing valve, and the cold and heat provided by the heat pump air-conditioning system are mainly used for controlling the temperature of the passenger compartment of the automobile. In the refrigeration mode, the heat exchanger inside the heat pump is used for cooling air supplied by the passenger compartment, and the heat exchanger outside the heat pump is used for discharging condensation heat; in the heating mode, the heat exchanger inside the heat pump is used for heating air supplied by the passenger compartment, and the heat exchanger outside the heat pump is used for absorbing heat of ambient air. After the requirements of the passenger compartment on the cold and heat are met, the cold and heat provided by the heat pump system are used for heat management of the battery box again, and the cold and heat are conducted through heat pipe circulation.
When the heat pump circulating system supplies cold to the battery box to cool the battery, a first heat pipe valve and a second heat pipe valve on the heat pipe circulating system are opened, and a third heat pipe valve and a fourth heat pipe valve are closed; after the first heat pipe external heat exchanger absorbs the cold energy of the refrigerant or the ambient air, the cold energy is transmitted to the heat pipe internal heat exchange section in the battery box through the heat pipe pipeline and is used for cooling the battery. At the moment, the first heat pipe external heat exchanger is used as a condensation section of the heat pipe circulating system, the heat pipe internal heat exchange section is used as an evaporation section of the heat pipe circulating system, working media in the heat pipe circulating system are changed into liquid after absorbing cold energy in the first heat pipe external heat exchanger and flow to the top of the heat pipe internal heat exchange section from the bottom of the heat pipe external heat exchanger, and the working media are changed into gas after absorbing heat of a battery in the heat pipe internal heat exchange section and flow back to the top of the first heat pipe external heat exchanger from the bottom of the heat pipe internal heat exchange section.
When the heat pump circulating system supplies heat to the battery box to heat the battery, a first heat pipe valve and a second heat pipe valve on the heat pipe circulating system are closed, and a third heat pipe valve and a fourth heat pipe valve are opened; after absorbing the heat of the refrigerant, the second heat pipe external heat exchanger transmits the heat to the heat pipe internal heat exchange section in the battery box through the heat pipe pipeline for heating the battery, at the moment, the second heat pipe external heat exchanger serves as an evaporation section of the heat pipe circulation system, the heat pipe internal heat exchange section serves as a condensation section of the heat pipe circulation system, the working medium of the heat pipe circulation becomes liquid after releasing the heat to the battery at the heat pipe internal heat exchange section and flows to the bottom of the second heat pipe external heat exchanger from the bottom of the heat pipe internal heat exchange section, the working medium of the heat pipe subsequently becomes gas after absorbing the heat released by the refrigerant in the second heat pipe external heat exchanger, and then the working medium of the gas flows to the top of the heat pipe internal heat exchange section from.
The heat pipe circulating system of the system adopts a gravity type heat pipe, and the flow driving force of working media inside the heat pipe is gravitational potential energy and density difference. In order to ensure the flow of working media in the heat pipe circulating system, when the system is in a refrigeration mode, the first heat pipe external heat exchanger is used as a heat pipe circulating condensation section, the heat pipe internal heat exchange section is used as a heat pipe circulating evaporation section, liquid working media flow from the bottom of the first heat pipe external heat exchanger to the top of the heat pipe internal heat exchange section, the mounting position of the first heat pipe external heat exchanger is higher than that of the heat pipe internal heat exchange section, and the included angle between a heat pipe connected between the first heat pipe external heat exchanger and the heat pipe internal heat exchange section; when the system is in a heating mode, the heat exchange section inside the heat pipe is used as a condensation section of heat pipe circulation, the second heat pipe external heat exchanger is used as an evaporation section of heat pipe circulation, a liquid working medium flows from the top of the heat exchange section inside the heat pipe to the inlet at the top of the second heat pipe external heat exchanger, the installation position of the heat exchange section inside the heat pipe is higher than that of the second heat pipe external heat exchanger, and the included angle between the heat pipe and the horizontal plane connecting the heat pipe and the second heat pipe external heat exchanger is larger than.
Compared with the prior art, the invention has the advantages that:
1. compared with the existing battery thermal management system of the new energy automobile, the system can realize the cooling and heating of the battery in one set of equipment at the same time, and the cold quantity and the heat quantity are directly supplied by the heat pump air conditioning system of the automobile through the circulation of the refrigerant without additional heating equipment (such as a PTC heater) and cooling equipment (such as a water chilling unit).
2. The invention realizes the transfer of cold and heat by adopting the circulation of the heat pipe, and the heat conduction rate and efficiency of the heat pipe are far higher than those of the conventional air or liquid cooling and heating equipment, so that the energy utilization efficiency of the system is substantially improved compared with the energy utilization efficiency of the conventional battery heat management system.
3. The invention can fully utilize the natural cold source of the external environment in the refrigeration mode, because the heat pipe system can realize the heat transfer with small temperature difference, and can utilize the ambient air to cool the battery in time when the ambient temperature is higher, thereby greatly reducing the energy consumption required by the battery cooling.
Drawings
Fig. 1 is a structural schematic diagram of a new energy vehicle battery thermal management system based on a heat pipe and a heat pump air conditioner, and a cooling mode and a heating mode of the system are both shown in the diagram.
Fig. 2 is a schematic structural diagram of a first heat pipe external heat exchanger in a new energy automobile battery thermal management system based on a heat pipe and a heat pump air conditioner.
Fig. 3 is a schematic view of an installation manner of a heat pipe circulation system of the new energy automobile battery thermal management system based on a heat pipe and a heat pump air conditioner.
Detailed Description
The technical solution adopted by the present invention will be further explained with reference to the schematic drawings.
The embodiment of the invention provides a new energy automobile battery thermal management system (hereinafter referred to as the system) based on a heat pipe and a heat pump air conditioner, which comprises the following components: a heat pump air conditioning system and a heat pipe circulating system. The heat pump air conditioning system is used for cold and heat regulation of a passenger compartment of the new energy automobile, and meanwhile, when the heat pump air conditioning system is in a refrigerating mode and a heating mode, cold and heat are conveyed to the heat pipe circulating system for assisting in heat management of the battery. The system is used for being in a refrigeration mode when the battery is cooled, the heat pump air-conditioning system runs in the refrigeration mode, and the redundant cold energy used for adjusting the temperature of the passenger compartment of the automobile is conveyed to the heat pipe circulating system.
The system is described in detail below with reference to fig. 1.
Referring to fig. 1, the heat pump air conditioning system includes a compressor 1, a four-way reversing valve 2 connected to the compressor, a heat pump external heat exchanger 3 connected to the four-way reversing valve, an electronic expansion valve 4 interposed between the heat pump external heat exchanger 3, a first three-way valve 6 connected to the electronic expansion valve 4, a heat pump internal heat exchanger 5 connected to the first three-way valve 6, and a second three-way valve 7 connected to the heat pump internal heat exchanger 5 and the four-way reversing valve 2.
The heat pipe circulating system comprises a heat pipe internal heat exchange section 13 arranged inside the battery box 12, a first heat pipe external heat exchanger 14 connected to the heat pipe internal heat exchange section 13 through a first heat pipe valve 16, and a second heat pipe external heat exchanger 15 connected to the heat pipe internal heat exchange section 13 through a third heat pipe valve 18, wherein a heat pipe pipeline at a working medium inlet end at the top of the heat pipe internal heat exchange section 13 is divided into two paths, one path is connected to a heat pipe working medium outlet end at the bottom of the first heat pipe external heat exchanger 14, and the branch path is provided with the first heat pipe valve 16; the other path is connected to a working medium outlet end of the heat pipe at the top of the second heat pipe external heat exchanger 15, and a third heat pipe valve 18 is arranged on the branch.
The other end of the second heat pipe external heat exchanger 15 is connected to the heat pipe internal heat exchange section 13 through a fourth heat pipe valve 19, a connection pipeline between the fourth heat pipe valve 19 and the heat pipe internal heat exchange section 13 is connected to the first heat pipe external heat exchanger 14 through a second heat pipe valve 17, and the first heat pipe external heat exchanger 14 is provided with an air channel 21 for conveying external air through an external fan 20. The heat pipe pipeline at the bottom working medium outlet end of the heat pipe internal heat exchange section 13 is also divided into two paths, one path is connected to the heat pipe working medium inlet end at the top of the first heat pipe external heat exchanger 14, and a second heat pipe valve 17 is arranged on the branch; the other path is connected to the working medium inlet end of the heat pipe at the bottom of the second heat pipe external heat exchanger 15, and a fourth heat pipe valve 19 is arranged on the branch.
A first refrigerant valve 8 is arranged on a refrigeration pipeline between the first three-way valve 6 and the first heat pump external heat exchanger 14; a second refrigerant valve 9 is arranged on a pipeline between the refrigerant flow passage outlet of the first heat pump external heat exchanger 14 and the second three-way valve 7; a third refrigerant valve 10 is arranged at the refrigerant flow channel inlet of the second heat pipe external heat exchanger 15, and a fourth refrigerant valve 11 is arranged at the refrigerant flow channel outlet.
Referring to fig. 2, which shows the first heat pump external heat exchanger 14 (the second heat pipe external heat exchanger 15 is of the same construction as the first heat pump external heat exchanger 14), the figure shows a refrigerant flow channel 14a and a heat exchange tube heat exchange section 14 b. The first heat pump external heat exchanger 14 includes two portions, a refrigerant pipe and a heat pipe heat exchange section. In the system refrigeration mode, the refrigerant of the heat pump circulation system flows through the refrigerant pipeline of the first heat pipe external heat exchanger 14, and the cold energy is transferred to the heat exchange section of the heat pipe; in the heating mode of the system, the refrigerant of the heat pump cycle flows through the refrigerant pipe of the second heat pipe external heat exchanger 15, where heat is transferred to the heat pipe heat exchange section.
The system changes the flow direction of the refrigerant by switching the internal pipelines of the four-way reversing valve 2, and realizes the conversion of the refrigeration and heating modes of the system by the operation of the related refrigerant valve and the heat pipe valve.
The heat pipe circulation system of this system is installed as shown in fig. 3. The installation position of the first heat pipe external heat exchanger 14 is higher than that of the heat pipe internal heat exchange section 13, and the included angle between the heat pipe connected between the first heat pipe external heat exchanger 14 and the horizontal plane is more than 30 degrees, wherein the bottom heat pipe section outlet of the first heat pipe external heat exchanger 14 is connected to the top inlet of the heat pipe internal heat exchange section 13 through a heat pipe, and the bottom outlet of the heat pipe internal heat exchange section 13 is connected back to the top inlet of the heat pipe section of the first heat pipe external heat exchanger 14 through a heat pipe pipeline; the installation position of the heat pipe internal heat exchanger 13 is higher than that of the second heat pipe external heat exchanger 15, and the included angle between the heat pipe 22 connecting the two and the horizontal plane is more than 30 degrees, wherein the bottom outlet of the heat pipe internal heat exchange section 13 is connected to the bottom inlet of the heat pipe section of the second heat pipe external heat exchanger 15 through a heat pipe pipeline, and the top heat pipe section outlet of the second heat pipe external heat exchanger 15 is connected to the top heat pipe inlet of the heat pipe internal heat exchange section 13 through a heat pipe pipeline.
In this embodiment, an exhaust pipe of the compressor 1 is switched by an internal pipe of the four-way reversing valve 2 and then connected to a refrigerant pipe port I3a of the heat pump external heat exchanger 3, a refrigerant pipe port II3b of the heat pump external heat exchanger 3 is connected to a refrigerant inlet of the electronic expansion valve 4, a refrigerant outlet of the electronic expansion valve 4 is connected to the first three-way valve 6, the refrigerant pipe is divided into two branches by the first three-way valve 6, the first branch is connected to a refrigerant pipe port II5b of the heat pump internal heat exchanger 5, and a refrigerant pipe port I5a of the heat pump internal heat exchanger 5 is connected to the second three-way valve; the second branch is connected to a refrigerant flow channel inlet of the first heat pump external heat exchanger 14, a first refrigerant valve 8 is arranged on a refrigeration pipeline between the first three-way valve 6 and the first heat pump external heat exchanger 14, a refrigerant flow channel outlet of the first heat pump external heat exchanger 14 is connected to the second three-way valve 7, and a second refrigerant valve 9 is arranged on a pipeline between the refrigerant flow channel outlet of the first heat pump external heat exchanger 14 and the second three-way valve 7; and two refrigerant branches are converged on the second three-way valve 7 and then are connected to the refrigerant inlet end of the compressor 1 after being switched by an internal pipeline of the four-way reversing valve 2.
The invention also provides a working method of the new energy automobile battery thermal management system based on the heat pipe and the heat pump air conditioner, and the working modes of the new energy automobile battery thermal management system comprise a cooling mode and a heating mode.
The cooling mode is as follows: an exhaust pipeline of the compressor 1 is connected to a refrigerant pipeline port 1 of the heat pump external heat exchanger 3 after being switched by an internal pipeline of the four-way reversing valve 2, the refrigerant pipeline port 2 of the heat pump external heat exchanger 3 is connected to a refrigerant inlet of the electronic expansion valve 4, and a refrigerant outlet of the electronic expansion valve 4 is connected to the first three-way valve 6. The refrigerant pipeline is divided into two branches after passing through a first three-way valve 6, the first branch is connected to a refrigerant pipeline port 2 of a heat pump internal heat exchanger 5, the refrigerant gives off heat in the heat pump internal heat exchanger 5 and is used for providing cold energy required by environmental control of a passenger compartment, and then a refrigerant pipeline port 1 of the heat pump internal heat exchanger 5 is connected to a second three-way valve 7; the second branch is used for transmitting cold energy to the heat pipe circulating system, the refrigerant pipeline is connected to the refrigerant flow channel inlet of the first heat pipe external heat exchanger 14 after being connected out from the other outlet of the first three-way valve 6, a first refrigerant valve 8 is arranged on the refrigeration pipeline between the first three-way valve 6 and the first heat pipe external heat exchanger 14, the refrigerant flow channel outlet of the first heat pipe external heat exchanger 14 is connected to the second three-way valve 7, and a second refrigerant valve 9 is arranged on the pipeline between the refrigerant flow channel outlet of the first heat pipe external heat exchanger 14 and the second three-way valve 7. Two refrigerant branches behind the first three-way valve 6 are converged at the second three-way valve 7 and then are connected to the refrigerant inlet end of the compressor 1 after being switched by the internal pipeline of the four-way reversing valve 2, and the refrigerant circulation is completed.
When the system is in a cooling mode, the first heat pipe external heat exchanger 14 and the heat pipe internal heat exchange section 13 in the heat pipe circulation system are in an operating state, the first heat pipe valve 16 and the second heat pipe valve 17 are in an open state, and the third heat pipe valve 18 and the fourth heat pipe valve 19 are in a closed state. The first heat pipe external heat exchanger 14 is used as a condensation end of heat pipe circulation, the heat pipe internal heat exchange section 13 is used as an evaporation end of the heat pipe circulation, a heat pipe working medium absorbs cold energy in a refrigerant or external air in the first heat pipe external heat exchanger 14 and then flows to the heat pipe internal heat exchange section 13 through a heat pipe pipeline, the cold energy released by the heat pipe working medium in the heat pipe internal heat exchange section 13 is used for cooling a battery, and then the heat pipe working medium flows back to the first heat pipe external heat exchanger 14 through the heat pipe pipeline to complete the circulation of the heat pipe working medium.
When the system is in a refrigeration mode and the ambient temperature is low, the first refrigerant valve 8 and the second refrigerant valve 9 are closed, and the cooling capacity of the battery is completely provided by the ambient air which is sent to the first heat pipe external heat exchanger 14 by the external fan 20 through the air duct 21, so that the energy conservation of the system is realized; when the ambient temperature is high, the first refrigerant valve 8 and the second refrigerant valve 9 are opened, and the cooling capacity of the battery is supplied to the first heat pipe external heat exchanger 14 by the refrigerant of the heat pump air conditioning system and the external ambient air at the same time.
The new energy automobile battery heat management system combining the heat pipe and the heat pump air conditioner is used for enabling a battery to be in a heating mode when the battery is heated, the heat pump air conditioner system runs in the heating mode, and the heat pipe circulation system is used for conveying the excess heat for adjusting the temperature of an automobile passenger compartment.
The heating mode is as follows: the flow direction of the refrigerant of the heat pump air conditioning system is opposite to that in the refrigeration mode, the refrigerant is switched through the internal pipeline of the four-way reversing valve 2, the exhaust port of the compressor 1 is connected to the second three-way valve 7, and the refrigerant inlet of the compressor 1 is connected to the refrigerant pipeline port 1 of the heat pump external heat exchanger 3. In addition, a third refrigerant branch is added on the basis of a refrigerant pipeline in a refrigeration mode, and the third refrigerant branch is connected with a third refrigerant valve 10, a refrigerant flow channel inlet of the second heat pipe external heat exchanger 15, a refrigerant flow channel outlet of the second heat pipe external heat exchanger 15, a fourth refrigerant valve 11 and a first three-way valve 6 in sequence from a second refrigerant valve 9. Among them, the third refrigerant valve 10 and the fourth refrigerant valve 11 are in a closed state in the cooling mode and in an open state in the heating mode. In the heating mode, the first refrigerant valve 8 is closed and the second refrigerant valve 9 is opened. The refrigerant respectively releases heat in the heat pump internal heat exchanger 5 and the second heat pipe external heat exchanger 15 and then joins the first three-way valve 6, and then the refrigerant pipeline passes through the electronic expansion valve 4 and the heat pump external heat exchanger 3 and then is connected back to the four-way reversing valve 2.
In the heating mode of the system, the heat pipe inner heat exchange section 13 and the second heat pipe outer heat exchanger 15 in the heat pipe circulation system are in an operating state, the first heat pipe valve 16 and the second heat pipe valve 17 are in a closed state, and the third heat pipe valve 18 and the fourth heat pipe valve 19 are in an open state. The second heat pipe external heat exchanger 15 is used as an evaporation end of heat pipe circulation, the heat pipe internal heat exchange section 13 is used as a condensation section of the heat pipe circulation, a heat pipe working medium absorbs heat emitted by a refrigerant in the second heat pipe external heat exchanger 15, then the working medium flows to the heat pipe internal heat exchange section 13 through a heat pipe pipeline, the heat pipe working medium emits heat in the heat pipe internal heat exchange section 13 for heating a battery, and then the working medium flows back to the second heat pipe external heat exchanger 15 through the heat pipe pipeline to complete the circulation of the heat pipe working medium.
The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (5)

1. New energy automobile battery thermal management system based on heat pipe and heat pump air conditioner, its characterized in that, it includes: the heat pump air conditioning system and the heat pipe circulating system are used for conveying cold and heat to the heat pipe circulation in a refrigerating mode and a heating mode;
the heat pump air-conditioning system comprises a compressor, a four-way reversing valve connected to the compressor, a heat pump external heat exchanger connected to the four-way reversing valve, an electronic expansion valve arranged between the heat pump external heat exchanger, a first three-way valve connected to the electronic expansion valve, a heat pump internal heat exchanger connected to the first three-way valve, and a second three-way valve connected to the heat pump internal heat exchanger and the four-way reversing valve;
the heat pipe circulating system comprises a heat pipe internal heat exchange section arranged in the battery box, a first heat pipe external heat exchanger connected to the heat pipe internal heat exchange section through a first heat pipe valve, and a second heat pipe external heat exchanger connected to the heat pipe internal heat exchange section through a third heat pipe valve, wherein the other end of the second heat pipe external heat exchanger is connected to the heat pipe internal heat exchange section through a fourth heat pipe valve, a connecting pipeline of the fourth heat pipe valve and the heat pipe internal heat exchange section is connected to the first heat pipe external heat exchanger through a second heat pipe valve, and the first heat pipe external heat exchanger is provided with an air channel for conveying external air through an external fan;
a first refrigerant valve is arranged on a refrigeration pipeline between the first three-way valve and the first heat pump external heat exchanger; a second refrigerant valve is arranged on a pipeline between the refrigerant flow passage outlet of the first heat pump external heat exchanger and the second three-way valve; and a third refrigerant valve is arranged at the refrigerant flow channel inlet of the second heat pipe external heat exchanger, and a fourth refrigerant valve is arranged at the refrigerant flow channel outlet.
2. The working method of the new energy automobile battery thermal management system based on the heat pipe and heat pump air conditioner as claimed in claim 1, wherein the working modes of the new energy automobile battery thermal management system comprise a cooling mode and a heating mode;
when the system is in a refrigeration mode, the first heat pipe external heat exchanger is used as a condensation section of heat pipe circulation, the heat pipe internal heat exchange section is used as an evaporation section of heat pipe circulation, the installation position of the first heat pipe external heat exchanger is higher than that of the heat pipe internal heat exchange section, and the included angle between the heat pipe and the horizontal plane for connecting the first heat pipe external heat exchanger and the heat pipe internal heat exchange section is more than 30 degrees; at the moment, the first heat pipe valve and the second heat pipe valve are in an open state, and the third heat pipe valve and the fourth heat pipe valve are in a closed state;
when the system is in a heating mode, the heat exchange section inside the heat pipe is used as a condensation section of heat pipe circulation, the second heat pipe external heat exchanger is used as an evaporation section of heat pipe circulation, the installation position of the heat exchange section inside the heat pipe 31 is higher than that of the second heat pipe external heat exchanger, and the included angle between the heat pipe and the horizontal plane connecting the heat pipe and the second heat pipe external heat exchanger is larger than 30 degrees; at this time, the first heat pipe valve and the second heat pipe valve are in a closed state, and the third heat pipe valve and the fourth heat pipe valve are in an open state.
3. The working method of the new energy automobile battery thermal management system based on the heat pipe and the heat pump air conditioner is characterized in that the cooling mode has two operation modes;
when the outdoor environment temperature is low, a first refrigerant valve and a second refrigerant valve on a heat pump circulating refrigerant pipeline are closed, and the cooling capacity required by battery cooling is completely supplied to the first heat pipe external heat exchanger by external air;
when the outdoor temperature is high, the first refrigerant valve and the second refrigerant valve on the refrigerant pipeline of the heat pump cycle are opened, the third refrigerant valve and the fourth refrigerant valve are closed, and the cooling capacity required by the battery cooling is supplied to the first heat pipe external heat exchanger by the external air and the heat pump refrigerant at the same time.
4. The working method of the new energy automobile battery thermal management system based on the heat pipe and the heat pump air conditioner is characterized in that an external fan of the new energy automobile battery thermal management system transmits natural cold energy in the environment to a first external heat exchanger through an air duct, and then the cold energy is transmitted to a heat exchange section inside the heat pipe through the heat pipe, so that the battery in the battery box is cooled.
5. The working method of the new energy automobile battery thermal management system based on the heat pipe and the heat pump air conditioner is characterized in that the gravity type heat pipe is adopted in the new energy automobile battery thermal management system, and the flowing driving force of the working medium in the heat pipe is gravitational potential energy and density difference.
CN202010021154.4A 2020-01-09 2020-01-09 New energy automobile battery thermal management system and method based on heat pipe and heat pump air conditioner Pending CN111231602A (en)

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Application publication date: 20200605