CN112349990A - Cooling control device and method for shared battery of built-in split type air conditioner of electric vehicle - Google Patents

Cooling control device and method for shared battery of built-in split type air conditioner of electric vehicle Download PDF

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Publication number
CN112349990A
CN112349990A CN201911294971.0A CN201911294971A CN112349990A CN 112349990 A CN112349990 A CN 112349990A CN 201911294971 A CN201911294971 A CN 201911294971A CN 112349990 A CN112349990 A CN 112349990A
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China
Prior art keywords
battery
temperature
heat exchanger
plate heat
cooling
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CN201911294971.0A
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Chinese (zh)
Inventor
陈春江
楼佳烽
梁烁
杨明
陈军
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Tens Of Thousands Of Qingyuan Intelligent Motor Car Co ltd
Wanxiang Group Corp
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Tens Of Thousands Of Qingyuan Intelligent Motor Car Co ltd
Wanxiang Group Corp
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Priority to CN201911294971.0A priority Critical patent/CN112349990A/en
Publication of CN112349990A publication Critical patent/CN112349990A/en
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    • 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
    • H01M10/613—Cooling or keeping cold
    • 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
    • B60H1/00507—Details, e.g. mounting arrangements, desaeration devices
    • B60H1/00585—Means for monitoring, testing or servicing the air-conditioning
    • 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
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
    • 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
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
    • 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
    • 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
    • H01M10/63—Control systems
    • 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
    • H01M10/63—Control systems
    • H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
    • 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
    • H01M10/6554—Rods or plates
    • 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
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • 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
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • 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
    • 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

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

Abstract

The invention relates to the field of automobile battery cooling, in particular to a shared battery cooling control device and method for an electric vehicle built-in split type air conditioner. The utility model provides an electric motor car embeds split type air conditioner shared battery cooling control device, includes built-in split type air conditioner and power battery, built-in split type air conditioner include compressor unit, condenser and evaporimeter, compressor unit on be provided with the plate heat exchanger who is used for cooling for battery coolant liquid. The invention CAN integrate two systems together, realize that the air conditioning and the battery cooling in the vehicle share one system, and realize the control and the regulation of the system through the CAN bus control strategy and the central control screen of the whole vehicle, thereby saving the installation space, reducing the energy consumption and increasing the endurance mileage.

Description

Cooling control device and method for shared battery of built-in split type air conditioner of electric vehicle
Technical Field
The invention relates to the field of automobile battery cooling, in particular to a shared battery cooling control device and method for an electric vehicle built-in split type air conditioner.
Background
At present, air conditioning and cooling of a pure electric bus are achieved by adopting a set of independent systems to achieve respective functions basically, the two sets of systems are not affected by each other and have no relevance, and an air conditioner basically achieves adjustment of functions such as air conditioner temperature, air speed, mode and fault code query by adopting a control panel of a manufacturer.
Two sets of systems are adopted, so that the energy consumption is increased, the installation space is wasted, no relevance exists in control, and the control of the whole vehicle is inconvenient.
For example, Chinese patent publication numbers are: CN102340045B, a power battery cooling circulation system announced in 2016, 5, month and 11, which comprises a power battery with a built-in fan, an air inlet pipe connected to an air inlet of the power battery, an exhaust pipe connected to an air outlet of the power battery, an indoor temperature sensor, an outdoor temperature sensor, a vehicle body control module, a first electronic valve with a tee joint arranged on the air inlet pipe, two outlets of the first electronic valve respectively connected to an outdoor air inlet and an indoor air inlet, a second electronic valve with a tee joint arranged on the exhaust pipe, and two outlets of the second electronic valve respectively connected to an outdoor exhaust port and an indoor exhaust port; the automobile body control module controls the opening modes of the air inlet and the air outlet through the temperature difference between the inside and the outside of the automobile, although the air conditioner load can be effectively reduced, the riding comfort of passengers is improved, and the automobile body control module can be widely applied to the field of electric automobiles, the air conditioner refrigeration and the air conditioner refrigeration adopt one independent system to realize respective functions, the two systems do not influence each other, the two systems are adopted, the energy consumption is increased, the installation space is wasted, no relevance exists in the control, and the control of the whole automobile is inconvenient.
Disclosure of Invention
The invention mainly aims at the problems that the air conditioning and cooling of the existing pure electric passenger car basically adopt a set of independent systems to realize respective functions, so that the energy consumption is increased, the installation space is wasted, the control is unrelated, and the control of the whole car is inconvenient, and provides a cooling control device and a cooling control method for a built-in split air conditioner shared battery of an electric car.
The purpose of the invention is mainly realized by the following scheme: the utility model provides an electric motor car embeds split type air conditioner shared battery cooling control device, includes built-in split type air conditioner and power battery, built-in split type air conditioner include compressor unit, condenser and evaporimeter, compressor unit on be provided with the plate heat exchanger who is used for cooling for battery coolant liquid. The built-in split type air conditioner comprises a compressor unit, a condenser and an evaporator, wherein a plate heat exchanger used for cooling the battery cooling liquid is arranged on the compressor unit, a set of plate heat exchanger system is integrated on the compressor unit, the control and the regulation of the system are realized through a whole vehicle CAN bus control strategy and a middle control screen, and the built-in split type air conditioner is used for cooling the battery cooling liquid, so that the cooling requirement of the battery is realized.
Preferably, the evaporator and the plate heat exchanger are both provided with electronic expansion valves. The control device is used for controlling the opening and closing of each refrigerant loop and adjusting the refrigerant flow, thereby realizing the accurate control of the refrigerating capacity.
Preferably, water temperature sensors for controlling the electronic expansion valve are arranged at the positions of the cooling liquid inlet and the cooling liquid outlet of the plate heat exchanger. The temperature of the battery cooling liquid is measured and fed back to the air conditioner, and the control of the electronic expansion valve is realized.
A working method of the cooling control device for the built-in split type air conditioner shared battery of the electric vehicle comprises three situations of a finished vehicle discharging running state, a finished vehicle charging state and an air conditioner fault. The system CAN realize that the refrigeration and the battery cooling share one set of system in the vehicle under the three conditions of the discharging running state of the whole vehicle, the charging state of the whole vehicle and the fault of an air conditioner, and realize the control and the regulation of the system through the CAN bus control strategy and the central control screen of the whole vehicle, thereby saving the installation space, reducing the energy consumption and increasing the endurance mileage.
Preferably, when the whole vehicle is in a discharging running state, if the air conditioner is in a refrigerating starting state, the battery management system judges whether battery cooling needs to be started according to the set temperature of the battery monomer, if the temperature of the battery monomer exceeds the set temperature value, the battery management system sends a battery cooling demand message, the battery discharging cooling is started, at this time, the air conditioner firstly judges the temperature of an air return opening in the vehicle according to the feedback of a temperature sensor in the air conditioner, if the temperature of the air return opening in the vehicle is more than or equal to 30 ℃, the plate heat exchanger is not started temporarily, an electronic expansion valve on the plate heat exchanger is closed, and the air conditioner state starting state and the plate heat exchanger closing state are sent to a whole vehicle controller or a central control screen for display, after the temperature of the air return opening in the vehicle is less than 30 ℃, the temperature of the battery coolant is judged; if the temperature is higher than 25 ℃, opening the electronic expansion valve of the plate heat exchanger to match the corresponding refrigerating capacity Q1And (3) cooling the cooling liquid, wherein the aim is to maintain the temperature of the cooling liquid at 25 ℃, if the outlet temperature of the plate heat exchanger is less than 25 ℃, the opening degree of the electronic expansion valve on the plate heat exchanger is automatically reduced until the temperature of the cooling liquid is continuously reduced to 15 ℃, the electronic expansion valve on the plate heat exchanger is closed, and when the temperature of the water is raised to 25 ℃ again, the electronic expansion valve of the plate heat exchanger is restarted. Q1Is based onThe refrigerating capacity of the air conditioner and the refrigerating capacity of the plate type heat exchanger are selected to be proper values.
Preferably, when the vehicle is in a discharge running state, if the air conditioner is in a ventilation mode or a closed state, if the temperature of a battery monomer reaches a set value, cooling is needed, the battery management system sends a message, the battery discharge cooling is started, the temperature of the battery coolant is judged, if the temperature of the battery coolant is less than or equal to 25 ℃, the plate heat exchanger is not started temporarily, if the temperature is more than 25 ℃, the electronic expansion valve at the plate heat exchanger side, the compressor unit and the condenser are started, the electronic expansion valve at the evaporator side is closed, and the corresponding refrigerating capacity Q is matched2And (3) cooling the cooling liquid, wherein the aim is to maintain the temperature of the cooling liquid at 25 ℃, if the outlet temperature of the plate heat exchanger is less than 25 ℃, the opening degree of the electronic expansion valve of the plate heat exchanger is automatically reduced until the temperature of the cooling liquid is continuously reduced to 15 ℃, the electronic expansion valve of the plate heat exchanger is closed, and when the temperature of the water is increased to 25 ℃ again, the electronic expansion valve of the plate heat exchanger is restarted. Q2And selecting a proper value according to the refrigerating capacity of the air conditioner and the refrigerating capacity of the plate type heat exchanger.
Preferably, when the vehicle is in a charging state, the air conditioner is turned off, the temperature of the battery monomer reaches a set value, cooling is needed, the battery management system sends a message, the battery discharge cooling is started, the temperature of the battery coolant is judged, and if the temperature of the battery coolant is less than or equal to 25 ℃, the plate heat exchanger is temporarily not started; if the temperature is higher than 25 ℃, opening the electronic expansion valve at the plate heat exchanger side, the compressor unit and the condenser, closing the electronic expansion valve at the evaporator side, and closing the air conditioner control panel to match the corresponding refrigerating capacity Q3And (3) cooling the cooling liquid, wherein the aim is to maintain the temperature of the cooling liquid at 25 ℃, if the outlet temperature of the plate heat exchanger is less than 25 ℃, the opening degree of the electronic expansion valve of the plate heat exchanger is automatically reduced until the temperature of the cooling liquid is continuously reduced to 15 ℃, the electronic expansion valve of the plate heat exchanger is closed, and when the temperature of the water is increased to 25 ℃ again, the electronic expansion valve of the plate heat exchanger is restarted. Q3And selecting a proper value according to the refrigerating capacity of the air conditioner and the refrigerating capacity of the plate type heat exchanger.
Preferably, when the air conditioner is in a fault state, the temperature of the single battery reaches a set value and needs to be cooled, the battery management system sends a message, the battery is discharged and cooled to be started, the air conditioner has a fault which affects the normal work of the plate heat exchanger, the air conditioner does not respond to the cooling of the battery, and at the moment, the fault message is sent to the whole vehicle and the central control screen.
Therefore, the cooling control device and the cooling control method for the shared battery of the built-in split type air conditioner of the electric vehicle have the following advantages: the invention CAN integrate two systems together, realize that the air conditioning and the battery cooling in the vehicle share one system, and realize the control and the regulation of the system through the CAN bus control strategy and the central control screen of the whole vehicle, thereby saving the installation space, reducing the energy consumption and increasing the endurance mileage.
Drawings
FIG. 1 is a hardware connection diagram of the present invention.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Example 1:
as shown in figure 1, the cooling control device for the shared battery of the built-in split type air conditioner of the electric vehicle comprises the built-in split type air conditioner and a power battery, wherein the built-in split type air conditioner comprises a compressor unit, a condenser and an evaporator, a plate type heat exchanger used for cooling battery cooling liquid is arranged on the compressor unit, a set of plate type heat exchanger system is integrated on the compressor unit, the control and the regulation of the system are realized through a whole vehicle CAN bus control strategy and a central control screen, the cooling control device is used for cooling the battery cooling liquid, and the cooling requirement of the battery is realized.
Electronic expansion valves are arranged on the evaporator and the plate heat exchanger and are used for controlling the opening and closing of respective refrigerant loops and adjusting the refrigerant flow, so that the accurate control of the refrigerating capacity is realized; and water temperature sensors for controlling the electronic expansion valve are arranged at the positions of the cooling liquid inlet and the cooling liquid outlet of the plate heat exchanger and used for measuring the temperature of the battery cooling liquid and feeding the temperature back to the air conditioner to control the electronic expansion valve.
The working method of the cooling control device for the split air conditioner shared battery built in the electric vehicle comprises three situations of a finished vehicle discharging running state, a finished vehicle charging state and an air conditioner fault, one set of system for realizing in-vehicle refrigeration and battery cooling sharing CAN be realized under the three situations of the finished vehicle discharging running state, the finished vehicle charging state and the air conditioner fault, the control and adjustment of the system are realized through a finished vehicle CAN bus control strategy and a central control screen, the installation space is saved, the energy consumption is reduced, and the cruising mileage is increased.
When the vehicle is in a discharging running state, if the air conditioner is in a refrigeration starting state, the battery management system judges whether the battery cooling needs to be started according to the set temperature of the battery monomer, if the temperature of the battery monomer exceeds the set temperature value, for example, when the temperature of the battery monomer exceeds 40 ℃, the battery management system sends a battery cooling demand message, the battery discharging cooling is started, at this time, the air conditioner firstly judges the temperature of the return air inlet in the vehicle according to the feedback of the temperature sensor in the air conditioner, if the temperature of the air return inlet in the vehicle is more than or equal to 30 ℃, the plate heat exchanger is not opened temporarily, the electronic expansion valve on the plate heat exchanger is closed, and the state of the air conditioner is started and the state of the plate heat exchanger is closed and is displayed to a vehicle controller or a central control screen, after the temperature of an air return inlet in the vehicle is lower than 30 ℃, judging the temperature of the battery cooling liquid, and if the temperature of the battery cooling liquid is less than or equal to 25 ℃, temporarily not starting the plate heat exchanger; if the temperature is higher than 25 ℃, opening the electronic expansion valve of the plate heat exchanger to match the corresponding refrigerating capacity Q1，Q1The method comprises the steps that a proper value is selected according to the refrigerating capacity of an air conditioner and the refrigerating capacity of a plate heat exchanger, cooling liquid begins to cool, the temperature of the cooling liquid is maintained at 25 ℃, if the outlet temperature of the plate heat exchanger is lower than 25 ℃, the opening degree of an electronic expansion valve on the plate heat exchanger is automatically reduced until the temperature of the cooling liquid is continuously reduced to 15 ℃, the electronic expansion valve on the plate heat exchanger is closed, and when the temperature of the water is increased to 25 ℃ again, the electronic expansion valve of the plate heat exchanger is restarted.
When the vehicle is in a discharge running state, if the air conditioner is in a ventilation mode or a closed state, if the temperature of the battery monomer reaches a set value, cooling is needed, the battery management system sends a message, the battery discharge cooling is started, the temperature of the battery coolant is judged, and if the temperature of the battery coolant is less than or equal to 25 ℃, the plate heat exchanger is temporarily stoppedOpening the plate heat exchanger side electronic expansion valve, the compressor unit and the condenser if the temperature is more than 25 ℃, closing the evaporator side electronic expansion valve and matching the corresponding refrigerating capacity Q2，Q2The method comprises the steps that a proper value is selected according to the refrigerating capacity of an air conditioner and the refrigerating capacity of a plate heat exchanger, cooling liquid begins to cool, the temperature of the cooling liquid is maintained at 25 ℃, if the outlet temperature of the plate heat exchanger is lower than 25 ℃, the opening degree of an electronic expansion valve of the plate heat exchanger is automatically reduced until the temperature of the cooling liquid is continuously reduced to 15 ℃, the electronic expansion valve of the plate heat exchanger is closed, and when the temperature of the water rises to 25 ℃ again, the electronic expansion valve of the plate heat exchanger is restarted.
When the vehicle is in a charging state, the air conditioner is turned off at the moment, the temperature of the battery monomer reaches a set value, for example, when the temperature of the battery monomer exceeds 34 ℃, the battery needs to be cooled, the battery management system sends a message, the battery is discharged and cooled, the temperature of the battery coolant is judged, and if the temperature of the battery coolant is less than or equal to 25 ℃, the plate heat exchanger is not started temporarily; if the temperature is higher than 25 ℃, opening the electronic expansion valve at the plate heat exchanger side, the compressor unit and the condenser, closing the electronic expansion valve at the evaporator side, and closing the air conditioner control panel to match the corresponding refrigerating capacity Q3，Q3The method comprises the steps that a proper value is selected according to the refrigerating capacity of an air conditioner and the refrigerating capacity of a plate heat exchanger, cooling liquid begins to cool, the temperature of the cooling liquid is maintained at 25 ℃, if the outlet temperature of the plate heat exchanger is lower than 25 ℃, the opening degree of an electronic expansion valve of the plate heat exchanger is automatically reduced until the temperature of the cooling liquid is continuously reduced to 15 ℃, the electronic expansion valve of the plate heat exchanger is closed, and when the temperature of the water rises to 25 ℃ again, the electronic expansion valve of the plate heat exchanger is restarted.
When the air conditioner is in a fault state, the temperature of the battery monomer reaches a set value and needs to be cooled, the battery management system sends a message, the battery is discharged and cooled to be started, the air conditioner has a fault which affects the normal work of the plate heat exchanger, the air conditioner does not respond to the cooling of the battery, and at the moment, the fault message is sent to the whole vehicle and the central control screen.
The real-time performance of the air conditioning message in the system plays a key role in the cooling operation of the whole battery system, and the real-time transmission of the air conditioning message is required to be ensured.
In addition, a system protection function is required to be made for the air conditioner, the reliability of the air conditioning system is preferably guaranteed, the air conditioning system is preferably protected if a water pump of a battery cooling system fails, a water channel is stagnated and the like, for example, the temperature of water exchanged by a judgment board of the air conditioner with a water temperature sensor is reduced from 25 ℃ to 15 ℃ within 2min, after the temperature is reduced for 2 times, the fault of the water channel system of the whole vehicle is judged, the air conditioning system is started to be protected, the battery is not responded to for cooling, a fault message is sent to the whole vehicle and a central control screen, and the judgment.
The control of refrigeration in the air-conditioned vehicle of the system is controlled by an integrated central control screen in the form of CAN messages, so that the mode conversion, the fault display and the wind speed and temperature regulation CAN be realized; the cooling control of the battery system is realized automatically according to a preset strategy through CAN messages.
After the method is applied and implemented, the battery system cooling system and the air conditioning system in-vehicle refrigeration system are integrated, so that the passenger car with a relatively tight space can play a good role in saving the space, and in addition, under the action of the electronic expansion valve, switching and cold quantity allocation can be freely realized between the battery system cooling and the air conditioning in-vehicle refrigeration through a control strategy, so that the effects of reducing energy consumption and increasing endurance are achieved. For an air conditioning system, only one plate heat exchanger, two water temperature sensors and one electronic expansion valve need to be added to hardware, but an independent battery system cooling device can be omitted, and the purpose of saving cost is achieved.
It should be understood that this example is only for illustrating the present invention and is not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.

Claims (8)

1. The utility model provides an electric motor car embeds split type air conditioner shared battery cooling control device which characterized in that, includes built-in split type air conditioner and power battery, built-in split type air conditioner include compressor unit, condenser and evaporimeter, compressor unit on be provided with the plate heat exchanger that is used for cooling for battery coolant liquid.
2. The cooling control device for the shared battery of the built-in split type air conditioners of the electric vehicles as claimed in claim 1, wherein the evaporator and the plate heat exchanger are both provided with electronic expansion valves.
3. The cooling control device for the shared battery of the built-in split type air conditioners of the electric vehicles as claimed in claim 2, wherein the cooling liquid inlet and outlet of the plate heat exchangers are respectively provided with a water temperature sensor for controlling the electronic expansion valve.
4. The working method of the cooling control device of the built-in split type air conditioner shared battery of the electric vehicle as claimed in any one of claims 1 to 3 is characterized by comprising three situations of a vehicle discharging running state, a vehicle charging state and an air conditioner fault.
5. The operating method of the cooling control device for the shared battery of the built-in split air conditioners of the electric vehicles according to claim 4, wherein when the electric vehicles are in a discharging operation state, if the air conditioner is in a cooling start state, the battery management system judges whether the battery cooling needs to be started according to the set temperature of the battery monomer, if the temperature of the battery monomer exceeds the set temperature value, the battery management system sends a battery cooling demand message, the battery discharging cooling is started, at this time, the air conditioner firstly judges the temperature of the return air inlet in the vehicle according to the feedback of the temperature sensor in the air conditioner, if the temperature of the return air inlet in the vehicle is more than or equal to 30 ℃, the plate heat exchanger is not started temporarily, the electronic expansion valve on the plate heat exchanger is closed, and sends the opening state of the air conditioner and the closing state of the plate heat exchanger to the vehicle control unit or the central control, judging the temperature of the battery cooling liquid, and if the temperature of the battery cooling liquid is less than or equal to 25 ℃, temporarily not starting the plate heat exchanger; if the temperature is higher than 25 ℃, opening an electronic expansion valve of the plate heat exchanger, and matching the twoRequired refrigerating capacity Q1And (3) cooling the cooling liquid, wherein the aim is to maintain the temperature of the cooling liquid at 25 ℃, if the outlet temperature of the plate heat exchanger is less than 25 ℃, the opening degree of the electronic expansion valve on the plate heat exchanger is automatically reduced until the temperature of the cooling liquid is continuously reduced to 15 ℃, the electronic expansion valve on the plate heat exchanger is closed, and when the temperature of the water is raised to 25 ℃ again, the electronic expansion valve of the plate heat exchanger is restarted.
6. The operating method of the device for controlling the cooling of the battery shared by the built-in split type air conditioners of the electric vehicles according to claim 5, wherein when the electric vehicle is in a discharge running state, if the air conditioner is in a ventilation mode or in a closed state, if the temperature of the battery monomer reaches a set value, cooling is required, the battery management system sends a message, the discharge cooling of the battery is started, the temperature of the battery coolant is judged, if the temperature of the battery coolant is less than or equal to 25 ℃, the plate heat exchanger is temporarily not started, if the temperature is more than 25 ℃, the electronic expansion valve at the side of the plate heat exchanger, the compressor unit and the condenser are started, and the electronic expansion valve at2(a proper value is selected according to the refrigerating capacity of the air conditioner and the refrigerating capacity of the plate heat exchanger), the cooling liquid begins to cool, the aim is to maintain the temperature of the cooling liquid at 25 ℃, if the outlet temperature of the plate heat exchanger is less than 25 ℃, the opening degree of an electronic expansion valve of the plate heat exchanger is automatically reduced until the temperature of the cooling liquid is continuously reduced to 15 ℃, the electronic expansion valve of the plate heat exchanger is closed, and when the temperature of the water is raised to 25 ℃ again, the electronic expansion valve of the plate heat exchanger is restarted.
7. The working method of the cooling control device for the shared battery of the built-in split type air conditioners of the electric vehicles according to claim 4 is characterized in that when the electric vehicles are in a charging state, the air conditioners are turned off, the temperature of the battery monomer reaches a set value, cooling is needed, the battery management system sends a message, the battery discharging cooling is started, the temperature of the battery cooling liquid is judged, and if the temperature of the battery cooling liquid is less than or equal to 25 ℃, the plate type heat exchanger is not started temporarily; if the temperature is higher than 25 ℃, opening an electronic expansion valve at the plate heat exchanger side, a compressor unit and a condenser, and opening an evaporator sideThe sub-expansion valve is closed, the air conditioner control panel is in a closed state and is matched with the corresponding refrigerating capacity Q3(a proper value is selected according to the refrigerating capacity of the air conditioner and the refrigerating capacity of the plate heat exchanger), the cooling liquid begins to cool, the aim is to maintain the temperature of the cooling liquid at 25 ℃, if the outlet temperature of the plate heat exchanger is less than 25 ℃, the opening degree of an electronic expansion valve of the plate heat exchanger is automatically reduced until the temperature of the cooling liquid is continuously reduced to 15 ℃, the electronic expansion valve of the plate heat exchanger is closed, and when the temperature of the water is raised to 25 ℃ again, the electronic expansion valve of the plate heat exchanger is restarted.
8. The working method of the cooling control device for the built-in split type air conditioner shared battery of the electric vehicle as claimed in claim 4, wherein when the electric vehicle is in a failure state of the air conditioner, the temperature of the battery monomer reaches a set value and needs to be cooled, the battery management system sends a message, the battery is discharged and cooled, the air conditioner has a failure which affects the normal operation of the plate heat exchanger, the air conditioner does not respond to the cooling of the battery, and at the moment, the failure message is sent to the whole vehicle and the central control screen.
CN201911294971.0A 2019-12-16 2019-12-16 Cooling control device and method for shared battery of built-in split type air conditioner of electric vehicle Pending CN112349990A (en)

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