CN114559857A - Thermal management system control method and device - Google Patents

Thermal management system control method and device Download PDF

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Publication number
CN114559857A
CN114559857A CN202210356102.1A CN202210356102A CN114559857A CN 114559857 A CN114559857 A CN 114559857A CN 202210356102 A CN202210356102 A CN 202210356102A CN 114559857 A CN114559857 A CN 114559857A
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China
Prior art keywords
battery
battery cooling
management system
water pump
electromagnetic valve
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Granted
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CN202210356102.1A
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CN114559857B (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 control method and a device for a thermal management system comprise the following steps: when the battery of the electric automobile needs to be cooled, controlling a water pump of a battery cooling loop not to operate, and starting an electromagnetic valve of a thermal management system to enable a refrigerant of an air conditioning system to flow through a heat exchanger to exchange heat with battery cooling liquid in the battery cooling loop; after a preset first time period, 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 preset second time period, opening the electromagnetic valve and controlling the water pump to stop running; when the temperature of battery coolant liquid reaches and predetermines reasonable within range in the battery cooling circuit, then open solenoid valve and water pump simultaneously and carry out battery cooling control, can reduce the temperature impact to passenger compartment air conditioning system when the battery cooling, can also avoid appearing valve high frequency switching noise, guarantee whole car NVH performance.

Description

Thermal management system control method and device
Technical Field
The application relates to the technical field of automobiles, in particular to a control method and device of a thermal management system.
Background
At present, electric automobile receives extensive attention from all over as new energy automobile, and electric automobile is at the operation in-process, and the temperature of electricity core can be maintained in certain temperature interval through the cooling system of whole car to make the charge-discharge of comparatively normal carrying on of electricity core. In a conventional control method of a thermal management system in an electric vehicle, a heat exchanger is generally coupled to a passenger compartment air conditioning system, an air compressor is shared by a battery cooling loop and the passenger compartment air conditioning loop, and an air conditioning refrigerant and a battery coolant exchange heat in a Chiller to cool a battery. However, in practice, the problem of sudden temperature change of an air outlet of an air conditioner in a passenger compartment can be caused by the conventional method, so that discomfort is caused to drivers and passengers, and meanwhile, high-frequency opening and closing noise of a valve is easy to occur, so that the NVH performance of the whole vehicle is influenced.
Disclosure of Invention
An object of the embodiment of the application is to provide a control method and device for a thermal management system, which can reduce temperature impact on an air conditioning system of a passenger compartment 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.
A first aspect of an embodiment of the present application provides a method for controlling a thermal management system, including:
when the battery of the electric automobile needs to be cooled, controlling a water pump of a battery cooling loop not to operate, and opening an electromagnetic valve of the thermal management system to enable a refrigerant of an air conditioning system to flow through a heat exchanger to exchange heat with battery cooling liquid in the battery cooling loop;
after a first preset time period, 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 the battery cooling liquid in the heat exchanger flows in the battery cooling loop to cool the battery cooling liquid;
after a preset second time period, opening the electromagnetic valve and controlling the water pump to stop running;
and when the temperature of the battery cooling liquid reaches a preset reasonable range, simultaneously opening the electromagnetic valve and the water pump to carry out battery cooling control.
In the implementation process, when the battery of the electric automobile is detected to need cooling, the water pump of the battery cooling loop is controlled not to operate, and the electromagnetic valve of the thermal 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 preset time period, 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 preset second time period, opening the electromagnetic valve and controlling the water pump to stop running; when the temperature of battery coolant liquid reaches and predetermines reasonable within range in the battery cooling circuit, then open solenoid valve and water pump simultaneously and carry out battery cooling control, can reduce the temperature impact to passenger compartment air conditioning system when the battery cooling, can also avoid appearing the valve high frequency switching noise simultaneously to guarantee whole car NVH performance.
Further, the method further comprises:
judging whether the temperature of the battery cooling liquid in the battery cooling loop reaches a preset reasonable range or not;
if yes, the electromagnetic valve and the water pump are opened simultaneously to carry out battery cooling control;
if not, closing the electromagnetic valve after the preset first time period is executed.
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 for controlling the battery cooling circuit does not operate, and the electromagnetic valve of the thermal management system is opened.
Further, the method further comprises:
and when the battery is judged to have no cooling requirement, controlling the water pump not to run and closing the electromagnetic valve.
A second aspect of the embodiments of the present application provides a thermal management system control apparatus, including:
the starting unit is used for controlling a water pump of the battery cooling loop not to run and starting an electromagnetic valve of the thermal management system when the battery of the electric automobile is detected to be cooled, so that a refrigerant of the air conditioning system flows through the heat exchanger to exchange heat with battery cooling liquid in the battery cooling loop;
the closing unit is used for closing the electromagnetic valve after a first time period is preset so as to enable the refrigerant to completely flow through the air conditioning loop;
the control unit is used 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 starting unit is also used for starting the electromagnetic valve after a preset second time period and controlling the water pump to stop running; and when the temperature of the battery cooling liquid reaches a preset reasonable range, simultaneously opening the electromagnetic valve and the water pump to carry out battery cooling control.
In the implementation process, when the starting unit detects that the battery of the electric automobile needs to be cooled, the starting unit controls a water pump of the battery cooling loop not to operate and starts an electromagnetic valve of the thermal management system so that a refrigerant of the air conditioning system flows through the heat exchanger to exchange heat with battery cooling liquid in the battery cooling loop; after the closing unit presets a first time period, the electromagnetic valve is closed to enable the refrigerant to completely flow 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; after the starting unit presets a second time period, the electromagnetic valve is started, and the water pump is controlled to stop running; when the temperature of battery coolant liquid reaches and predetermines reasonable within range, then open solenoid valve and water pump simultaneously and carry out battery cooling control, can reduce the temperature impact to passenger cabin air conditioning system when the battery cools off, can also avoid appearing the valve high frequency switching noise simultaneously to guarantee whole car NVH performance.
Further, the thermal management system control device further includes:
the first judgment 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 open the electromagnetic valve and the water pump simultaneously to carry out battery cooling control; if not, triggering the closing unit to close the electromagnetic valve after presetting the 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;
the second judging unit is used for judging whether the battery has a cooling requirement according to the battery temperature; if yes, triggering the starting unit to control a water pump of the battery cooling circuit not to run, and starting an electromagnetic valve of the thermal management system.
Further, the control unit is further configured to control the water pump not to operate and close the solenoid valve when it is determined that the battery has no cooling demand.
A third aspect of the embodiments of the present application provides an electronic device, including a memory and a processor, where the memory is used to store a computer program, and the processor runs the computer program to make the electronic device execute the thermal management system control method according to any one of the first aspect of the embodiments of the present application.
A fourth aspect of the embodiments of the present application provides a computer-readable storage medium, which stores computer program instructions, and when the computer program instructions are read and executed by a processor, the computer program instructions perform the thermal management system control method 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 required to be used 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 therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic flowchart of a control method of a thermal management system according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a control device of a thermal management system according to an embodiment of the present disclosure;
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 drawings in the embodiments of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
Example 1
Referring to fig. 1, fig. 1 is a schematic flowchart illustrating a control method of a thermal management system according to an embodiment of the present disclosure. The control method of the thermal management system comprises the following steps:
and 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 thermal management systems of electric vehicles, and is a coordination control method applied to a common thermal management system architecture (an electromagnetic valve and a thermal expansion valve).
In this embodiment, an execution main body of the method may be a thermal management system control device, and specifically, the thermal management system control device may be run on a computer, a server, a smart phone, a tablet computer, and the like, which is not limited in this embodiment.
S102, judging whether the battery has a cooling requirement according to the temperature of the battery, and if not, executing a step S103; if so, go to step S104.
And S103, controlling the water pump not to run, closing the electromagnetic valve, and executing the step S101 to the step S102.
Referring to fig. 3, fig. 3 is a schematic diagram of a battery cooling circuit of a thermal management system of an electric vehicle according to an embodiment of the present disclosure, where, as shown in fig. 3, HVAC represents a passenger compartment air conditioning system and a cooling circuit thereof, AC COND represents an air conditioning system radiator, TXV represents a thermal expansion valve, SOV represents a solenoid valve, Chiller represents a heat exchanger, HV BATT represents a power battery (i.e., a battery of a 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 power battery HV BATT is detected.
Referring to fig. 4, fig. 4 is a control process diagram of a control method of a thermal management system according to an embodiment of the present invention, when there is no cooling demand on a battery, a water pump of a battery cooling circuit is not operated, an electromagnetic valve (SOV) is in a closed state, and all refrigerants of an air conditioning system flow through an air conditioning circuit (HVAC) for air conditioning and cooling a passenger compartment.
After step S103, the following steps are also included:
and S104, controlling a water pump of the battery cooling loop not to operate, and starting an electromagnetic valve of the thermal management system to enable a refrigerant of the air conditioning system to flow through the heat exchanger to exchange heat with battery cooling liquid in the battery cooling loop.
In the embodiment of the application, when the battery has a cooling demand, a Vehicle Control Unit (VCU) controls the electromagnetic valve to be opened, so that a part of refrigerant can flow through the heat exchanger (Chiller) to exchange heat with the battery cooling liquid in the battery cooling loop; at this time, the water pump is kept out of operation, so that the refrigerant only exchanges heat with the battery coolant in the heat exchanger. Because the volume of the battery cooling liquid in the heat exchanger is small, the battery cooling liquid can finish heat exchange with the refrigerant in a short time, the separated refrigerant is few, the temperature impact on the air conditioning system is small, and the temperature rise of the air outlet of the passenger compartment is small.
And S105, after the 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.
In the embodiment of the application, after waiting for a preset first time period (T1), the refrigerant and the battery coolant in the heat exchanger complete heat exchange, and the temperature of the battery coolant decreases; at the moment, the vehicle control unit 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 following steps are also included:
and S106, after the preset second time period, 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 step S105 to the step S107; if so, step S108 is performed.
In the embodiment of the application, after the preset second time period (T2) is waited, the battery cooling liquid in the battery cooling loop finishes heat exchange, and the temperature does not change any more; repeating the operation of the step S105 to the step S107, controlling the electromagnetic valve to be opened, stopping the water pump from running, and allowing a part of refrigerant to flow through the heat exchanger to exchange heat with the partially cooled battery coolant; 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.
And S108, simultaneously opening the electromagnetic valve and the water pump to carry out battery cooling control.
In the embodiment of the application, when the temperature of battery coolant reached and predetermine reasonable within range, opened the solenoid valve this moment after, it is not obvious to the temperature impact of air conditioning system, then can open solenoid valve and water pump simultaneously, normally carry out battery cooling control.
In the embodiment of the application, the temperature impact on the air conditioning system of the passenger compartment during battery cooling is positively correlated with the refrigerant quantity divided by the battery cooling loop. The thermostatic expansion valve is structured 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 degree of the expansion valve is, and the more refrigerants enter the battery cooling loop; conversely, the smaller the temperature difference between the battery coolant 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 is c · m · Δ T.
In the existing control method, when a battery is cooled, an electromagnetic valve and a water pump are simultaneously opened, and a refrigerant and battery cooling liquid both flow, namely the refrigerant of an 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 balance temperature is long, the number of shunted refrigerants is large, and the temperature impact on an 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 mode in the early stage of cooling the battery, 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 for achieving the balance temperature is short, the number of the shunted refrigerants is small, and the temperature impact on the air-conditioning system is small. And then closing the electromagnetic valve, opening the water pump, and carrying out internal temperature equalization on the battery cooling liquid to reduce the overall temperature of the battery cooling liquid, so that the temperature impact on the air conditioning system is gradually reduced when the electromagnetic valve is opened every time. And because the solenoid valve and the water pump all need experience temperature balance in the timesharing switching process, consequently the switching frequency is not high, can not cause the influence to whole car NVH performance.
Therefore, the control method of the thermal management system described in the embodiment can reduce the temperature impact on the passenger compartment air conditioning system when the battery is cooled, and can avoid the high-frequency opening and closing noise of the valve, thereby ensuring the NVH performance of the whole vehicle.
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 present application. As shown in fig. 2, the thermal management system control device includes:
the starting unit 210 is used for controlling a water pump of the battery cooling loop not to operate and starting an electromagnetic valve of the thermal management system when the battery of the electric automobile needs to be cooled, so that a 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 220 is configured to close the electromagnetic valve after a preset first time period, so that the refrigerant completely flows through the air conditioning loop;
a control unit 230 for controlling the water pump to start operation so that the battery coolant in the heat exchanger flows in the battery cooling loop to cool the battery coolant;
the opening unit 210 is further configured to open the electromagnetic valve after a preset second time period, and control the water pump to stop operating; when the temperature of the battery cooling liquid reaches a preset reasonable range, the electromagnetic valve and the water pump are simultaneously opened to carry out battery cooling control.
As an optional implementation manner, the thermal management system control device further includes:
a first judging unit 240 for judging whether the temperature of the battery coolant reaches a preset reasonable range; if yes, the starting unit 210 is triggered to simultaneously start the electromagnetic valve and the water pump to carry out battery cooling control; if not, the trigger closing unit 220 closes the solenoid valve after a preset first period of time.
As an optional implementation manner, 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, configured to judge whether the battery has a cooling requirement according to the battery temperature; if yes, the trigger starting unit 210 controls the water pump of the battery cooling circuit not to operate, and opens the electromagnetic valve of the thermal management system.
As an alternative embodiment, the control unit 230 is further configured to control the water pump not to operate and close the solenoid valve when it is determined that the battery has no cooling requirement.
In the embodiment of the present application, for the explanation of the thermal management system control device, reference may be made to the description in embodiment 1, and details are not repeated in this embodiment.
It can be seen that, the control device of the thermal management system described in the embodiment can reduce the temperature impact on the passenger compartment air conditioning system when the battery is cooled, and can also avoid the occurrence of high-frequency opening and closing noise of the valve, thereby ensuring the NVH performance of the whole vehicle.
An embodiment of the present application provides an electronic device, which includes a memory and a processor, where the memory is used to store a computer program, and the processor runs the computer program to make the electronic device execute the thermal management system control method in embodiment 1 of the present application.
An embodiment of the present application provides a computer-readable storage medium, which stores computer program instructions, and when the computer program instructions are read and executed by a processor, the method for controlling a thermal management system in embodiment 1 of the present application is executed.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures 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 that 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 an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent 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 such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute 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), a magnetic disk or an optical disk, and 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 changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by 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 should be noted that, in this document, 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. Also, 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 an … …" does not exclude the presence of other identical 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 needs to be cooled, controlling a water pump of a battery cooling loop not to operate, and opening an electromagnetic valve of the thermal management system to enable a refrigerant of an air conditioning system to flow through a heat exchanger to exchange heat with battery cooling liquid in the battery cooling loop;
after a preset first time period, 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 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 preset second time period, opening the electromagnetic valve and controlling the water pump to stop running;
and when the temperature of the battery cooling liquid in the battery cooling loop reaches a preset reasonable range, simultaneously opening the electromagnetic valve and the water pump to carry out battery cooling control.
2. The thermal management system control method of claim 1, further comprising:
judging whether the temperature of the battery cooling liquid in the battery cooling loop reaches a preset reasonable range or not;
if yes, the electromagnetic valve and the water pump are opened simultaneously to carry out battery cooling control;
if not, closing the electromagnetic valve after the preset first time period is executed.
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 for controlling the battery cooling circuit does not operate, 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 the battery is judged to have no cooling requirement, controlling the water pump not to run and closing the electromagnetic valve.
5. A thermal management system control apparatus, comprising:
the starting unit is used for controlling a water pump of the battery cooling loop not to run and starting an electromagnetic valve of the thermal management system when the battery of the electric automobile is detected to be cooled, so that a refrigerant of the air conditioning system flows through the heat exchanger to exchange heat with battery cooling liquid in the battery cooling loop;
the closing unit is used for closing the electromagnetic valve after a first time period is preset so as to enable the refrigerant to completely flow through the air conditioning loop;
the control unit is used 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 starting unit is also used for starting the electromagnetic valve after a preset second time period and controlling the water pump to stop running; and when the temperature of the battery cooling liquid reaches a preset reasonable range, simultaneously opening the electromagnetic valve and the water pump to carry out battery cooling control.
6. The thermal management system control apparatus of claim 5, further comprising:
the first judgment 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 open the electromagnetic valve and the water pump simultaneously to carry out battery cooling control; if not, triggering the closing unit to close the electromagnetic valve after presetting the first time period.
7. The thermal management system control apparatus 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;
the second judging unit is used for judging whether the battery has a cooling requirement according to the battery temperature; if yes, the starting unit is triggered to control the water pump of the battery cooling circuit not to run, and the electromagnetic valve of the thermal management system is started.
8. The thermal management system control device according to claim 5, wherein the control unit is further configured to control the water pump not to operate and 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 for executing the computer program to cause the electronic device to perform the thermal management system control method of any 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 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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