CN114559857B - Control method and device for thermal management system - Google Patents

Control method and device for thermal management system Download PDF

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Publication number
CN114559857B
CN114559857B CN202210356102.1A CN202210356102A CN114559857B CN 114559857 B CN114559857 B CN 114559857B CN 202210356102 A CN202210356102 A CN 202210356102A CN 114559857 B CN114559857 B CN 114559857B
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China
Prior art keywords
battery cooling
battery
management system
electromagnetic valve
water pump
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CN114559857A (en
Inventor
欧光宇
覃威铭
郑俊军
周才
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GAC Aion New Energy Automobile Co Ltd
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GAC Aion New Energy Automobile Co Ltd
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    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • H01M10/63—Control systems
    • H01M10/635—Control systems based on ambient temperature
    • 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
    • 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)
  • Manufacturing & Machinery (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Automation & Control Theory (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

A thermal management system control method and device, comprising: when the battery of the electric automobile is detected to be required to be cooled, controlling a water pump of a battery cooling loop to be not operated, and starting an electromagnetic valve of a heat management system so that a refrigerant of an air conditioning system flows through a heat exchanger to exchange heat with battery cooling liquid in the battery cooling loop; closing the electromagnetic valve after a preset first time period to enable the refrigerant to completely flow through the air conditioning loop, and controlling the water pump to start to operate so as to enable the battery cooling liquid in the heat exchanger to flow in the battery cooling loop to cool the battery cooling liquid in the battery cooling loop; opening an electromagnetic valve after a second time period is preset, and controlling the water pump to stop running; when the temperature of battery cooling liquid in the battery cooling loop reaches the preset reasonable range, the electromagnetic valve and the water pump are simultaneously started to perform battery cooling control, so that the temperature impact on an air conditioning system of a passenger cabin can be reduced during battery cooling, the high-frequency opening and closing noise of the valve can be avoided, and the NVH performance of the whole vehicle is ensured.

Description

Control method and device for thermal management system
Technical Field
The application relates to the technical field of automobiles, in particular to a control method and a device of a thermal management system.
Background
At present, electric vehicles are widely focused on as new energy vehicles in various circles, and the temperature of a battery cell can be maintained in a certain temperature interval through a cooling system of the whole electric vehicle in the running process of the electric vehicles, so that the battery cell can be charged and discharged normally. In the existing control method of the thermal management system of the electric automobile, the heat exchanger is generally coupled with the passenger cabin air conditioning system, the battery cooling loop and the passenger cabin air conditioning loop share an air compressor, and an air conditioning refrigerant and battery cooling liquid exchange heat in a Chiller, so that the battery is cooled. However, in practice, the existing method can cause the problem of abrupt change of temperature of an air outlet of an air conditioner in a passenger cabin, so that passengers are uncomfortable, and high-frequency opening and closing noise of a valve is easy to occur, so that NVH performance of the whole vehicle is affected.
Disclosure of Invention
The embodiment of the application aims to provide a control method and a device for a thermal management system, which can reduce the temperature impact on an air conditioning system of a passenger cabin when a battery is cooled, and can avoid high-frequency opening and closing noise of a valve, so that the NVH performance of the whole vehicle is ensured.
An embodiment of the present application provides a method for controlling a thermal management system, including:
when the battery of the electric automobile is detected to be required to be cooled, controlling a water pump of a battery cooling loop to be not operated, and starting an electromagnetic valve of the thermal management system so that a refrigerant of an air conditioning system flows through a heat exchanger to exchange heat with battery cooling liquid in the battery cooling loop;
after a first time period is preset, closing the electromagnetic valve to enable the refrigerant to completely flow through an air conditioning loop, and controlling the water pump to start to operate so as to enable the battery cooling liquid in the heat exchanger to flow in the battery cooling loop to cool the battery cooling liquid;
after a second time period is preset, the electromagnetic valve is opened, and the water pump is controlled to stop running;
when the temperature of the battery cooling liquid reaches a preset reasonable range, the electromagnetic valve and the water pump are simultaneously started to perform battery cooling control.
In the implementation process, when the battery of the electric automobile is detected to be required to be cooled, the water pump of the battery cooling loop is controlled to be not operated, and the electromagnetic valve of the heat management system is opened, so that the refrigerant of the air conditioning system flows through the heat exchanger to exchange heat with the battery cooling liquid in the battery cooling loop; after a first time period is preset, closing the electromagnetic valve to enable the refrigerant to completely flow through the air conditioning loop, and controlling the water pump to start to operate so that the battery cooling liquid in the heat exchanger flows in the battery cooling loop to cool the battery cooling liquid in the battery cooling loop; after a second time period is preset, opening the electromagnetic valve and controlling the water pump to stop running; when the temperature of battery cooling liquid in the battery cooling loop reaches the preset reasonable range, the electromagnetic valve and the water pump are simultaneously started to perform battery cooling control, so that the temperature impact on the passenger cabin air conditioning system can be reduced during battery cooling, and the high-frequency opening and closing noise of the valve can be avoided, thereby ensuring the NVH performance of the whole vehicle.
Further, the method further comprises:
judging whether the temperature of battery cooling liquid in the battery cooling loop reaches a preset reasonable range or not;
if yes, executing the operation of simultaneously starting the electromagnetic valve and the water pump to perform battery cooling control;
if not, executing the step of closing the electromagnetic valve after the preset first time period.
Further, the method further comprises:
detecting the battery temperature of the battery of the electric automobile through a battery management system;
judging whether the battery has a cooling requirement according to the battery temperature;
if yes, the water pump controlling the battery cooling loop is not operated, and the electromagnetic valve of the thermal management system is opened.
Further, the method further comprises:
and when judging that the battery has no cooling requirement, controlling the water pump to be not operated, and closing the electromagnetic valve.
A second aspect of an embodiment of the present application provides a thermal management system control apparatus, including:
the starting unit is used for controlling the water pump of the battery cooling loop to be not operated when the battery of the electric automobile is detected to be required to be cooled, and starting the electromagnetic valve of the thermal management system so that the refrigerant of the air conditioning system flows through the heat exchanger to exchange heat with the battery cooling liquid in the battery cooling loop;
the closing unit is used for closing the electromagnetic valve after a preset first time period so that the refrigerant completely flows through the air conditioning loop;
a control unit for controlling the water pump to start to operate so that the battery cooling liquid in the heat exchanger flows in the battery cooling loop to cool the battery cooling liquid;
the opening unit is also used for opening the electromagnetic valve and controlling the water pump to stop running after a second time period is preset; when the temperature of the battery cooling liquid reaches a preset reasonable range, the electromagnetic valve and the water pump are simultaneously started to perform battery cooling control.
In the implementation process, when the opening unit detects that the battery of the electric automobile needs to be cooled, controlling a water pump of a battery cooling loop to be not operated, and opening an electromagnetic valve of a heat management system so that a refrigerant of an air conditioning system flows through a heat exchanger to exchange heat with battery cooling liquid in the battery cooling loop; after a first time period is preset, the closing unit closes the electromagnetic valve so that the refrigerant completely flows through the air conditioning loop, and the control unit controls the water pump to start to operate so that the battery cooling liquid in the heat exchanger flows in the battery cooling loop to cool the battery cooling liquid; the opening unit opens the electromagnetic valve after a second time period is preset, and controls the water pump to stop running; when the temperature of the battery cooling liquid reaches the preset reasonable range, the electromagnetic valve and the water pump are simultaneously started to perform battery cooling control, so that the temperature impact on the passenger cabin air conditioning system can be reduced when the battery is cooled, and the high-frequency opening and closing noise of the valve can be avoided, thereby ensuring the NVH performance of the whole vehicle.
Further, the thermal management system control device further includes:
the first judging unit is used for judging whether the temperature of the battery cooling liquid reaches a preset reasonable range or not; if yes, triggering the opening unit to simultaneously open the electromagnetic valve and the water pump to perform battery cooling control; if not, triggering the closing unit to close the electromagnetic valve after the preset first time period.
Further, the thermal management system control device further includes:
the detection unit is used for detecting the battery temperature of the battery of the electric automobile through the battery management system;
a second judging unit for judging whether the battery has a cooling requirement according to the battery temperature; and if so, triggering the opening unit to control the water pump of the battery cooling loop to be not operated, and opening the electromagnetic valve of the thermal management system.
Further, the control unit is further configured to control the water pump to not operate and close the electromagnetic valve when it is determined that the battery has no cooling requirement.
A third aspect of the embodiment of the present application provides an electronic device, including a memory and a processor, where the memory is configured to store a computer program, and the processor is configured to execute the computer program to cause the electronic device to execute the thermal management system control method according to any one of the first aspect of the embodiment of the present application.
A fourth aspect of the embodiments of the present application provides a computer readable storage medium storing computer program instructions which, when read and executed by a processor, perform the method of controlling a thermal management system according to any one of the first aspect of the embodiments of the present application.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and other related drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a control method of a thermal management system according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a control device of a thermal management system according to an embodiment of the present application;
fig. 3 is a schematic diagram of a battery cooling circuit of an electric vehicle thermal management system according to an embodiment of the present application;
fig. 4 is a control process diagram of a control method of a thermal management system according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only to distinguish the description, and are not to be construed as indicating or implying relative importance.
Example 1
Referring to fig. 1, fig. 1 is a flowchart of a thermal management system control method according to an embodiment of the application. The control method of the thermal management system comprises the following steps:
s101, detecting the battery temperature of the battery of the electric automobile through a battery management system.
In the embodiment of the application, the method belongs to the technical field of control of electric automobile thermal management systems, and is a coordinated control method applied to a common thermal management system architecture (electromagnetic valve and thermal expansion valve).
In the embodiment of the present application, the execution body of the method may be a thermal management system control device, and in particular, the thermal management system control device may be operated on a computer, a server, a smart phone, a tablet computer, or other devices, which is not limited in this embodiment.
S102, judging whether the battery has a cooling requirement according to the temperature of the battery, if not, executing step S103; if so, step S104 is performed.
S103, controlling the water pump not to operate, closing the electromagnetic valve, and executing steps S101-S102.
Referring to fig. 3 together, fig. 3 is a schematic diagram of a battery cooling circuit of an electric vehicle thermal management system according to an embodiment of the present application, where, as shown in fig. 3, HVAC represents a cabin air conditioning system and a cooling circuit thereof, AC COND represents a radiator of the air conditioning system, TXV represents a thermal expansion valve, SOV represents an electromagnetic valve, beller represents a heat exchanger, HV BATT represents a power battery (i.e., a battery of the battery cooling circuit), and Pump represents a water Pump of the battery cooling circuit.
In the embodiment of the application, the battery temperature of the battery of the electric automobile is detected through the battery management system, namely the battery temperature of the HV BATT of the power battery is detected.
Referring to fig. 4 together, fig. 4 is a control process diagram of a control method of a thermal management system according to an embodiment of the present application, when a battery has no cooling requirement, a water pump of a battery cooling circuit is not operated, an electromagnetic valve (SOV) is in a closed state, and a refrigerant of an air conditioning system flows through an air conditioning circuit (HVAC) entirely for cooling an air conditioner of a passenger cabin.
After step S103, the method further comprises the steps of:
s104, controlling the water pump of the battery cooling loop to be not operated, and opening the electromagnetic valve of the heat management system so that the refrigerant of the air conditioning system flows through the heat exchanger to exchange heat with the battery cooling liquid in the battery cooling loop.
In the embodiment of the application, when the battery has a cooling requirement, a whole Vehicle Controller (VCU) controls an electromagnetic valve to be opened, so that a part of refrigerant can flow through a heat exchanger (Chiller) to exchange heat with battery cooling liquid in a battery cooling loop; at this time, the water pump is kept not in operation, so that the refrigerant only exchanges heat with the battery cooling liquid in the heat exchanger. Because the volume of the battery cooling liquid in the heat exchanger is smaller, the heat exchange can be completed with the refrigerant in a short time, the separated refrigerant is less, and the temperature impact on the air conditioning system is smaller, so that the temperature rise of the air outlet of the passenger cabin is also smaller.
S105, after a first preset period of time, the electromagnetic valve is closed so that the refrigerant completely flows through the air conditioning loop, and the water pump is controlled to start to operate, so that the battery cooling liquid in the heat exchanger flows in the battery cooling loop to cool the battery cooling liquid in the battery cooling loop.
In the embodiment of the application, after waiting for a preset first time period (T1), the refrigerant and the battery cooling liquid in the heat exchanger complete heat exchange, and the temperature of the battery cooling liquid is reduced; at the moment, the whole vehicle controller controls the electromagnetic valve to be closed, so that the refrigerant completely flows through the air conditioning loop, and simultaneously controls the water pump to start to operate, so that the low-temperature battery cooling liquid in the heat exchanger flows in the battery cooling loop, and the high-temperature battery cooling liquid in the battery cooling loop is cooled.
After step S105, the method further includes the steps of:
s106, after the second time period is preset, opening the electromagnetic valve and controlling the water pump to stop running.
S107, judging whether the temperature of the battery cooling liquid in the battery cooling loop reaches a preset reasonable range, and if not, executing the steps S105-S107; if so, step S108 is performed.
In the embodiment of the application, after waiting for a preset second time period (T2), the battery cooling liquid in the battery cooling loop completes heat exchange, and the temperature is not changed any more; at this time, repeating the operations of step S105 to step S107, controlling the electromagnetic valve to be opened, stopping the operation of the water pump, and allowing a part of refrigerant to flow through the heat exchanger to exchange heat with the partially cooled battery cooling liquid; since the battery coolant temperature is lower than the first time at this time, the temperature impact on the air conditioning system is also lower than the first time.
S108, simultaneously opening the electromagnetic valve and the water pump to perform battery cooling control.
In the embodiment of the application, when the temperature of the battery cooling liquid reaches the preset reasonable range, after the electromagnetic valve is opened, the electromagnetic valve and the water pump can be opened at the same time, so that the battery cooling control is normally performed.
In the embodiment of the application, the temperature impact of the battery on the passenger cabin air conditioning system during cooling is positively related to the quantity of the refrigerant separated by the battery cooling loop. The structure of the thermal expansion valve is to adjust the opening of the expansion valve by comparing the temperature difference between the battery cooling liquid and the refrigerant, thereby controlling the flow of the refrigerant entering the battery cooling loop. The larger the temperature difference between the battery cooling liquid and the refrigerant is, the larger the opening of the expansion valve is, and the more refrigerant enters the battery cooling loop; conversely, the smaller the temperature difference between the battery cooling liquid and the refrigerant, the smaller the opening of the expansion valve, and the less refrigerant enters the battery cooling circuit. According to the law of conservation of energy, in the heat exchanger, the heat absorbed by the refrigerant is equal to the heat given off by the battery cooling water: q=c·m·Δt.
In the existing control method, when the battery is cooled, the electromagnetic valve and the water pump are simultaneously opened, and the refrigerant and the battery cooling liquid flow, namely, the refrigerant of the air conditioning loop needs to exchange heat with the battery cooling liquid of the whole battery cooling loop, so that the time for reaching the equilibrium temperature is long, the split refrigerant is more, and the temperature impact of the air conditioning system is large.
In the embodiment of the application, the electromagnetic valve and the water pump are opened and closed in a time-sharing way in the early stage of battery cooling, and when the electromagnetic valve is opened and the refrigerant flows to the heat exchanger, the refrigerant in the air conditioning loop only exchanges heat with the battery cooling liquid in the heat exchanger, so that the time required for reaching the equilibrium temperature is short, the split refrigerant is less, and the temperature impact of an air conditioning system is small. And then closing the electromagnetic valve, opening the water pump, and enabling the battery cooling liquid to perform internal temperature equalization, so that the overall temperature of the battery cooling liquid is reduced, and the temperature impact on the air conditioning system is gradually reduced when the electromagnetic valve is opened each time. In addition, the electromagnetic valve and the water pump are required to be subjected to temperature balance in the time-sharing opening and closing process, so that the opening and closing frequency is low, and the NVH performance of the whole vehicle is not affected.
Therefore, by implementing the control method of the thermal management system described in the embodiment, the temperature impact on the passenger cabin air conditioning system can be reduced when the battery is cooled, and the high-frequency opening and closing noise of the valve can be avoided, so that the NVH performance of the whole vehicle is ensured.
Example 2
Referring to fig. 2, fig. 2 is a schematic structural diagram of a control device of a thermal management system according to an embodiment of the application. As shown in fig. 2, the thermal management system control apparatus includes:
the opening unit 210 is configured to control the water pump of the battery cooling circuit to be inoperative when it is detected that the battery of the electric vehicle needs to be cooled, and open the electromagnetic valve of the thermal management system, so that the refrigerant of the air conditioning system flows through the heat exchanger to exchange heat with the battery cooling liquid in the battery cooling circuit;
a closing unit 220 for closing the solenoid valve after a preset first period of time to completely flow the refrigerant through the air conditioning circuit;
a control unit 230 for controlling the water pump to start to operate so that the battery cooling liquid in the heat exchanger flows in the battery cooling circuit to cool the battery cooling liquid;
the opening unit 210 is further configured to open the electromagnetic valve and control the water pump to stop running after a second time period is preset; when the temperature of the battery cooling liquid reaches the preset reasonable range, the electromagnetic valve and the water pump are simultaneously started to perform battery cooling control.
As an alternative embodiment, the thermal management system control device further includes:
a first judging unit 240 for judging whether the temperature of the battery cooling liquid reaches within a preset reasonable range; if yes, the opening unit 210 is triggered to simultaneously open the electromagnetic valve and the water pump for battery cooling control; if not, the closing unit 220 is triggered to close the solenoid valve after the preset first period of time.
As an alternative embodiment, the thermal management system control device further includes:
a detection unit 250 for detecting a battery temperature of the battery of the electric vehicle through the battery management system;
a second judging unit 260 for judging whether the battery has a cooling requirement according to the battery temperature; if so, the activation unit 210 is triggered to control the water pump of the battery cooling circuit to be not operated and to open the solenoid valve of the thermal management system.
As an alternative embodiment, the control unit 230 is further configured to control the water pump to be not operated and close the electromagnetic valve when it is determined that the battery has no cooling requirement.
In the embodiment of the present application, the explanation of the thermal management system control device may refer to the description in embodiment 1, and no redundant description is given in this embodiment.
Therefore, by implementing the control device of the thermal management system described in the embodiment, the temperature impact on the passenger cabin air conditioning system can be reduced when the battery is cooled, and the high-frequency opening and closing noise of the valve can be avoided, so that the NVH performance of the whole vehicle is ensured.
An embodiment of the present application provides an electronic device, including a memory and a processor, where the memory is configured to store a computer program, and the processor runs the computer program to cause the electronic device to execute a thermal management system control method in embodiment 1 of the present application.
An embodiment of the present application provides a computer readable storage medium storing computer program instructions that, when read and executed by a processor, perform the thermal management system control method of embodiment 1 of the present application.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. The apparatus embodiments described above are merely illustrative, for example, of the flowcharts and block diagrams in the figures that illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, functional modules in the embodiments of the present application may be integrated together to form a single part, or each module may exist alone, or two or more modules may be integrated to form a single part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and variations will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Claims (10)

1. A method of controlling a thermal management system, comprising:
when the battery of the electric automobile is detected to be required to be cooled, controlling a water pump of a battery cooling loop to be not operated, and starting an electromagnetic valve of the thermal management system so that a refrigerant of an air conditioning system flows through a heat exchanger to exchange heat with battery cooling liquid in the battery cooling loop;
after a first time period is preset, closing the electromagnetic valve to enable the refrigerant to completely flow through an air conditioning loop, and controlling the water pump to start to operate, so that battery cooling liquid in the heat exchanger flows in the battery cooling loop to cool the battery cooling liquid in the battery cooling loop;
after a second time period is preset, the electromagnetic valve is opened, and the water pump is controlled to stop running;
when the temperature of the battery cooling liquid in the battery cooling loop reaches a preset reasonable range, the electromagnetic valve and the water pump are simultaneously started to perform battery cooling control.
2. The thermal management system control method of claim 1, further comprising:
judging whether the temperature of battery cooling liquid in the battery cooling loop reaches a preset reasonable range or not;
if yes, executing the operation of simultaneously starting the electromagnetic valve and the water pump to perform battery cooling control;
if not, executing the step of closing the electromagnetic valve after the preset first time period.
3. The thermal management system control method of claim 1, further comprising:
detecting the battery temperature of the battery of the electric automobile through a battery management system;
judging whether the battery has a cooling requirement according to the battery temperature;
if yes, the water pump controlling the battery cooling loop is not operated, and the electromagnetic valve of the thermal management system is opened.
4. The thermal management system control method of claim 1, further comprising:
and when judging that the battery has no cooling requirement, controlling the water pump to be not operated, and closing the electromagnetic valve.
5. A thermal management system control apparatus, the thermal management system control apparatus comprising:
the starting unit is used for controlling the water pump of the battery cooling loop to be not operated when the battery of the electric automobile is detected to be required to be cooled, and starting the electromagnetic valve of the thermal management system so that the refrigerant of the air conditioning system flows through the heat exchanger to exchange heat with the battery cooling liquid in the battery cooling loop;
the closing unit is used for closing the electromagnetic valve after a preset first time period so that the refrigerant completely flows through the air conditioning loop;
a control unit for controlling the water pump to start to operate so that the battery cooling liquid in the heat exchanger flows in the battery cooling loop to cool the battery cooling liquid;
the opening unit is also used for opening the electromagnetic valve and controlling the water pump to stop running after a second time period is preset; when the temperature of the battery cooling liquid reaches a preset reasonable range, the electromagnetic valve and the water pump are simultaneously started to perform battery cooling control.
6. The thermal management system control device of claim 5, further comprising:
the first judging unit is used for judging whether the temperature of the battery cooling liquid reaches a preset reasonable range or not; if yes, triggering the opening unit to simultaneously open the electromagnetic valve and the water pump to perform battery cooling control; if not, triggering the closing unit to close the electromagnetic valve after the preset first time period.
7. The thermal management system control device of claim 5, further comprising:
the detection unit is used for detecting the battery temperature of the battery of the electric automobile through the battery management system;
a second judging unit for judging whether the battery has a cooling requirement according to the battery temperature; and if so, triggering the opening unit to control the water pump of the battery cooling loop to be not operated, and opening the electromagnetic valve of the thermal management system.
8. The thermal management system control of claim 5, wherein the control unit is further configured to control the water pump to be inactive and to close the solenoid valve when it is determined that the battery has no cooling demand.
9. An electronic device comprising a memory for storing a computer program and a processor that runs the computer program to cause the electronic device to execute the thermal management system control method of any one of claims 1 to 4.
10. A readable storage medium having stored therein computer program instructions which, when read and executed by a processor, perform the thermal management system control method of any one of claims 1 to 4.
CN202210356102.1A 2022-04-06 2022-04-06 Control method and device for thermal management system Active CN114559857B (en)

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