CN112455185A - Battery thermal management control method, equipment, storage medium and device - Google Patents

Battery thermal management control method, equipment, storage medium and device Download PDF

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Publication number
CN112455185A
CN112455185A CN202011426363.3A CN202011426363A CN112455185A CN 112455185 A CN112455185 A CN 112455185A CN 202011426363 A CN202011426363 A CN 202011426363A CN 112455185 A CN112455185 A CN 112455185A
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China
Prior art keywords
temperature
cabin
battery
expansion valve
electronic expansion
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Pending
Application number
CN202011426363.3A
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Chinese (zh)
Inventor
江兵
杨亚冬
刘莹莹
叶昌森
王钊
童睿龙
燕逸飞
许泺飞
许成林
李爽爽
梁荣荣
王重阳
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Anhui Jianghuai Automobile Group Corp
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Anhui Jianghuai Automobile Group Corp
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Application filed by Anhui Jianghuai Automobile Group Corp filed Critical Anhui Jianghuai Automobile Group Corp
Priority to CN202011426363.3A priority Critical patent/CN112455185A/en
Publication of CN112455185A publication Critical patent/CN112455185A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00271—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
    • B60H1/00642—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
    • H01M10/61—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
    • H01M10/66—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells
    • H01M10/663—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells the system being an air-conditioner or an engine
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • 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)
  • Mechanical Engineering (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Energy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Automation & Control Theory (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

The invention discloses a battery thermal management control method, equipment, a storage medium and a device, wherein the rotating speed of an air compressor is adjusted through the opening state of an electronic expansion valve; adjusting the rotating speed of the air conditioner compressor according to the opening instruction of the cabin electromagnetic valve, the current cabin temperature and the target cabin temperature; when the temperature of the vehicle cabin reaches the target vehicle cabin temperature and the temperature of the power battery reaches the preset temperature, the electromagnetic valve and the electronic expansion valve are closed, and the air-conditioning compressor motor is controlled to stop running. The invention can respectively open the corresponding cabin electromagnetic valve and the battery electronic expansion valve, and trigger the operation of the condenser fan and the starting of the compressor motor so as to meet the requirement of double cooling of the cabin and/or the battery, and the temperature regulation is more accurate.

Description

Battery thermal management control method, equipment, storage medium and device
Technical Field
The invention relates to the technical field of automobiles, in particular to a battery thermal management control method, equipment, a storage medium and a device.
Background
With the rapid development of the electric automobile industry at home and abroad in recent years, the further improvement of the environmental applicability of the battery is the key point of the research in the field of battery thermal management for electric automobiles, and the air conditioner control system of the traditional power battery thermal management system has the advantages that a cooling loop is applied to compressor refrigeration, so that the battery cooling process influences the cabin refrigeration, the regulation precision of the cabin temperature and the power battery temperature is limited, and the user experience is poor.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a battery thermal management control method, equipment, a storage medium and a device, and aims to solve the technical problem that the precision of regulating the temperature of a vehicle cabin and the temperature of a power battery is limited in the prior art.
In order to achieve the above object, the present invention provides a battery thermal management control method, including the steps of:
acquiring the current cabin temperature and the power battery temperature;
determining the opening state of the electronic expansion valve according to the temperature of the power battery, and adjusting the rotating speed of the air compressor according to the opening state so as to enable the temperature of the power battery to reach the preset temperature;
acquiring an opening instruction of a cabin electromagnetic valve;
adjusting the rotating speed of the air conditioner compressor according to the opening instruction, the current cabin temperature and the target cabin temperature so as to enable the temperature of the cabin to reach the target cabin temperature;
and when the temperature of the cabin reaches the target cabin temperature and the temperature of the power battery reaches the preset temperature, closing the electromagnetic valve and the electronic expansion valve, and controlling the motor of the air-conditioning compressor to stop running.
Preferably, the step of determining the opening state of the electronic expansion valve according to the temperature of the power battery, and adjusting the rotating speed of the air-conditioning compressor according to the opening state so as to enable the temperature of the power battery to reach the preset temperature includes:
when the temperature of the power battery is higher than a preset temperature, determining the opening degree of the electronic expansion valve according to the temperature difference between the temperature of the power battery and the preset temperature;
and opening the electronic expansion valve according to the opening degree of the electronic expansion valve, and adjusting the rotating speed of the air compressor according to the opening degree of the electronic expansion valve so as to enable the temperature of the power battery to reach the preset temperature.
Preferably, the step of opening the electronic expansion valve according to the opening degree of the electronic expansion valve and adjusting the rotating speed of the air-conditioning compressor according to the opening degree of the electronic expansion valve so as to enable the temperature of the power battery to reach the preset temperature includes:
opening the electronic expansion valve according to the opening of the electronic expansion valve, and searching the rotating speed of the air conditioner compressor corresponding to the opening of the electronic expansion valve according to a preset rotating speed mapping table;
and adjusting the air conditioner compressor according to the rotating speed of the air conditioner compressor so as to enable the temperature of the power battery to reach the preset temperature.
Preferably, after the steps of closing the electromagnetic valve and the electronic expansion valve and controlling the air conditioner compressor motor to stop operating when the temperature of the cabin reaches the target cabin temperature and the temperature of the power battery reaches the preset temperature, the method further comprises:
acquiring vehicle working condition information;
and sending a control instruction to the air-conditioning compressor according to the vehicle working condition information and a preset emergency strategy so that the air-conditioning compressor adjusts the current rotating speed according to the control instruction.
Preferably, the step of determining the opening state of the electronic expansion valve according to the temperature of the power battery, and adjusting the rotating speed of the air-conditioning compressor according to the opening state so as to enable the temperature of the power battery to reach the preset temperature includes:
when the temperature of the power battery is lower than a preset battery frosting temperature, determining the opening degree of the electronic expansion valve according to the temperature difference between the temperature of the power battery and the preset frosting protection temperature;
and opening the electronic expansion valve according to the opening degree of the electronic expansion valve, and adjusting the rotating speed of the air compressor according to the opening degree of the electronic expansion valve so as to enable the temperature of the power battery to reach the preset temperature.
Preferably, after the steps of closing the electromagnetic valve and the electronic expansion valve and controlling the air conditioner compressor motor to stop operating when the temperature of the cabin reaches the target cabin temperature and the temperature of the power battery reaches the preset temperature, the method further comprises:
when the current power battery temperature is lower than a preset battery frosting temperature and the cabin temperature is lower than the preset cabin frosting temperature, the air conditioner compressor is adjusted to a preset low-speed working mode, and the opening of a cabin electromagnetic valve and the opening of a battery electronic expansion valve are determined according to the preset battery frosting temperature and the preset cabin frosting temperature;
and adjusting the rotating speed of the air conditioner compressor according to the opening degree of the cabin electromagnetic valve and the opening degree of the battery electronic expansion valve.
Preferably, before the step of closing the electromagnetic valve and the electronic expansion valve and controlling the air conditioner compressor motor to stop operating when the temperature of the cabin reaches the target cabin temperature and the temperature of the power battery reaches the preset temperature, the method further comprises:
acquiring working condition information of an air conditioner compressor;
determining a speed reduction threshold value of the air-conditioning compressor according to the rotating speed information contained in the working condition information and a preset noise step mapping table;
and matching the rotating speed of the air conditioner compressor according to the speed reduction threshold value, and reducing the speed of the air conditioner compressor according to a matching result.
In addition, in order to achieve the above object, the present invention further provides a battery thermal management control device, where the battery thermal management control device includes a memory, a processor, and a battery thermal management control program stored in the memory and executable on the processor, and the battery thermal management control program is configured to implement the steps of the battery thermal management control as described above.
In addition, in order to achieve the above object, the present invention further provides a storage medium, where a battery thermal management control program is stored, and the battery thermal management control program implements the steps of the battery thermal management control method as described above when executed by a processor.
In addition, in order to achieve the above object, the present invention further provides a battery thermal management control device, including:
the temperature acquisition module is used for acquiring the current cabin temperature and the power battery temperature;
the rotating speed adjusting module is used for determining the opening state of the electronic expansion valve according to the temperature of the power battery and adjusting the rotating speed of the air compressor according to the opening state so as to enable the temperature of the power battery to reach the preset temperature;
and an instruction acquisition module. The system is used for acquiring an opening instruction of the cabin electromagnetic valve;
the rotating speed adjusting module is further used for adjusting the rotating speed of the air conditioner compressor according to the opening instruction, the current cabin temperature and the target cabin temperature so that the temperature of the cabin reaches the target cabin temperature;
and the air conditioner control module is used for closing the electromagnetic valve and the electronic expansion valve when the temperature of the vehicle cabin reaches the target vehicle cabin temperature and the temperature of the power battery reaches the preset temperature, and controlling the motor of the air conditioner compressor to stop running.
The method comprises the steps of obtaining the current cabin temperature and the power battery temperature; determining the opening state of the electronic expansion valve according to the temperature of the power battery, and adjusting the rotating speed of the air compressor according to the opening state so as to enable the temperature of the power battery to reach the preset temperature; acquiring an opening instruction of a cabin electromagnetic valve; adjusting the rotating speed of the air conditioner compressor according to the opening instruction, the current cabin temperature and the target cabin temperature so as to enable the temperature of the cabin to reach the target cabin temperature; when the temperature of the vehicle cabin reaches the target vehicle cabin temperature and the temperature of the power battery reaches the preset temperature, the electromagnetic valve and the electronic expansion valve are closed, and the motor of the air-conditioning compressor is controlled to stop running. According to the invention, the corresponding cabin electromagnetic valve and the corresponding battery electronic expansion valve can be respectively opened through the detected cabin refrigeration request signal and the battery cooling request signal, and the operation of the condenser fan and the starting of the compressor motor are triggered, so that the requirement of double cooling of the cabin and/or the battery is met, and the temperature regulation is more accurate.
Drawings
Fig. 1 is a schematic structural diagram of a battery thermal management control device of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a battery thermal management control method according to a first embodiment of the present invention;
FIG. 3 is a flowchart illustrating a battery thermal management control method according to a second embodiment of the present invention;
FIG. 4 is a flowchart illustrating a battery thermal management control method according to a third embodiment of the present invention;
fig. 5 is a block diagram illustrating a first embodiment of a battery thermal management control apparatus according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a battery thermal management control device in a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the battery thermal management control apparatus may include: a processor 1001, such as a Central Processing Unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), and the optional user interface 1003 may further include a standard wired interface and a wireless interface, and the wired interface for the user interface 1003 may be a USB interface in the present invention. The network interface 1004 may optionally include a standard wired interface, a WIreless interface (e.g., a WIreless-FIdelity (WI-FI) interface). The Memory 1005 may be a Random Access Memory (RAM) Memory or a Non-volatile Memory (NVM), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the configuration shown in fig. 1 does not constitute a limitation of the battery thermal management control apparatus and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, memory 1005, identified as one type of computer storage medium, may include an operating system, a network communication module, a user interface module, and a battery thermal management control program.
In the battery thermal management control device shown in fig. 1, the network interface 1004 is mainly used for connecting to a background server and performing data communication with the background server; the user interface 1003 is mainly used for connecting user equipment; the battery thermal management control device calls a battery thermal management control program stored in the memory 1005 through the processor 1001, and executes the battery thermal management control method provided by the embodiment of the present invention.
Based on the hardware structure, the embodiment of the battery thermal management control method is provided.
Referring to fig. 2, fig. 2 is a schematic flow chart of a battery thermal management control method according to a first embodiment of the present invention, and proposes the first embodiment of the battery thermal management control method according to the present invention.
In a first embodiment, the battery thermal management control method includes the steps of:
step S10 obtains the current cabin temperature and the power battery temperature.
It should be noted that, the execution main body of the embodiment may be a device having a battery thermal management control system, and the device may be a device such as a vehicle-mounted computer, a tablet computer, a mobile phone, a notebook computer, and the like, and the embodiment takes the vehicle-mounted computer as an example, and the embodiment and the following embodiments take the vehicle-mounted computer as an example to describe the battery thermal management control method of the present invention. The battery thermal management control system may include: the system comprises a vehicle cabin air conditioner controller, a vehicle control unit, a compressor controller, a vehicle cabin temperature sensor connected with the vehicle cabin air conditioner controller, a battery temperature sensor and a condenser fan connected with the vehicle control unit, and a vehicle cabin evaporator electromagnetic valve, a battery evaporator electromagnetic valve and a compressor motor connected with the compressor controller.
It will be appreciated that. The vehicle cabin temperature sensor is used for acquiring the actual temperature of the vehicle cabin in real time and sending the actual temperature of the vehicle cabin to the vehicle cabin air conditioner controller; the battery temperature sensor is used for acquiring the actual temperature of the battery in real time and sending the actual temperature of the battery to the vehicle control unit; and the vehicle cabin air conditioner controller is used for sending a vehicle cabin evaporator electromagnetic valve opening instruction, a refrigerating temperature and a vehicle cabin actual temperature to the compressor controller after receiving the vehicle cabin refrigerating request signal. The current cabin temperature may refer to the current cabin temperature, and the power battery temperature may refer to a phenomenon of battery surface heating generated due to chemical, electrochemical change, electron migration, substance transmission and other reasons occurring in an internal structure of the power battery when the power battery is used, or may refer to a temperature when the temperature changes due to an external environment temperature. The temperature of the power battery has a large influence on the characteristics of the power battery, and the temperature can influence the activity and the charge and discharge performance of the battery material.
It should be understood that the system further comprises: a mobile network communication module; the vehicle controller can receive a vehicle cabin refrigeration remote request signal through the mobile network communication module, and send a vehicle cabin pre-refrigeration request signal to the vehicle cabin air conditioner controller after receiving the vehicle cabin refrigeration remote request signal; the vehicle cabin air conditioner controller can send a vehicle cabin evaporator electromagnetic valve opening instruction and a preset vehicle cabin precooling temperature to the compressor controller after receiving the vehicle cabin precooling request signal; the method comprises the steps that after a compressor controller receives a vehicle cabin evaporator electromagnetic valve opening instruction before a vehicle is started, the compressor controller triggers the vehicle cabin evaporator electromagnetic valve to be opened, and sends a condenser fan starting request signal to a vehicle control unit; and after the condenser fan is determined to be in a running state, triggering the compressor motor to start, and controlling the running speed of the compressor motor according to the pre-cooling temperature of the cabin and the actual temperature of the cabin.
In the concrete implementation, the vehicle-mounted computer can acquire the actual temperature of the vehicle cabin in real time through the vehicle cabin temperature controller and send the actual temperature of the vehicle cabin to the vehicle cabin air conditioner controller. The battery temperature sensor can be used for acquiring the actual temperature of the battery in real time and sending the actual temperature of the battery to the vehicle control unit.
Step S20: and determining the opening state of the electronic expansion valve according to the temperature of the power battery, and adjusting the rotating speed of the air compressor according to the opening state so as to enable the temperature of the power battery to reach the preset temperature.
The electronic expansion valve controls the voltage or current applied to the expansion valve by using the signal generated by the adjusted parameter, thereby achieving the purpose of adjusting the liquid supply amount.
It is understood that the preset temperature may refer to a temperature at which the power battery is normally charged and discharged in an operating state.
It should be understood that the vehicle control unit may be configured to detect the actual battery temperature collected by the battery temperature sensor in real time, and send a battery evaporator solenoid valve opening command, a preset temperature required for cooling, and the actual battery temperature to the compressor controller according to a preset battery thermal management strategy.
In the specific implementation, the vehicle-mounted computer can detect an opening instruction of the battery electronic expansion valve, open the battery electronic expansion valve and trigger the condenser fan to operate; and after the operation of the condenser fan is determined, triggering the compressor motor to start, and controlling the running speed of the compressor motor according to the temperature required by cooling and the actual temperature of the battery.
Step S30: and acquiring an opening instruction of the cabin electromagnetic valve.
It should be noted that the opening instruction of the cabin electromagnetic valve may be an instruction for opening the air conditioner input by the driver, or may be an instruction for adaptively adjusting and opening the air conditioner by recognizing the current cabin temperature.
In specific implementation, after receiving a vehicle cabin refrigeration request signal, the vehicle-mounted computer can send a vehicle cabin evaporator solenoid valve opening instruction, a refrigeration temperature and a vehicle cabin actual temperature to the compressor controller through the vehicle cabin air conditioner controller. The vehicle cabin air conditioner controller is also used for sending a closing instruction of a vehicle cabin evaporator electromagnetic valve to the compressor controller after receiving a vehicle cabin refrigeration closing request signal; the vehicle control unit is further used for sending a battery evaporator electromagnetic valve closing instruction to the compressor controller according to the battery thermal management strategy; triggering the condenser fan to stop running after receiving the condenser fan stop request signal; the compressor controller is also used for triggering the cabin evaporator electromagnetic valve to close when the cabin evaporator electromagnetic valve and the battery evaporator electromagnetic valve are both in an open state and after receiving a closing instruction of the cabin evaporator electromagnetic valve, and controlling the running speed of the compressor motor according to the temperature required by cooling and the actual temperature of the battery.
Step S40: and adjusting the rotating speed of the air conditioner compressor according to the opening instruction, the current cabin temperature and the target cabin temperature so as to enable the temperature of the cabin to reach the target cabin temperature.
It should be noted that the target cabin temperature may be a temperature set according to a driver's demand.
In the specific implementation, when detecting the opening instruction of the vehicle cabin electromagnetic valve, the vehicle-mounted computer opens the vehicle cabin electromagnetic valve and triggers the condenser fan to operate; and after the condenser fan is determined to run, triggering a compressor motor to start, and controlling the running speed of the compressor motor according to the target cabin temperature and the actual cabin temperature. After receiving a condenser fan starting request signal, the vehicle control unit triggers a condenser fan to operate and sends a condenser fan state signal to the compressor controller; the condenser fan status signal is used for indicating whether the condenser fan is in a running state or not; and the compressor controller triggers the compressor motor to start after determining that the condenser fan is in the running state according to the condenser fan state signal, and controls the running speed of the compressor motor according to the refrigeration temperature and the actual temperature of the cabin and/or the temperature required by cooling and the actual temperature of the battery.
Step S50: and when the temperature of the cabin reaches the target cabin temperature and the temperature of the power battery reaches the preset temperature, closing the electromagnetic valve and the electronic expansion valve, and controlling the motor of the air-conditioning compressor to stop running.
In the concrete implementation, a vehicle cabin electromagnetic valve and a battery electronic expansion valve are both in an open state, and when a closing instruction of the vehicle cabin electromagnetic valve is detected, the vehicle cabin electromagnetic valve is closed, and the running speed of a compressor motor is controlled according to the temperature required by cooling and the actual temperature of a battery; if the cabin electromagnetic valve and the battery electronic expansion valve are both in an opening state and a closing instruction of the battery electronic expansion valve is detected, closing the battery electronic expansion valve, and controlling the running speed of the compressor motor according to the refrigerating temperature and the actual temperature of the cabin; if the cabin electromagnetic valve is in a closed state, the battery electronic expansion valve is in an open state, and a closing instruction of the battery electronic expansion valve is detected, triggering the compressor motor to stop running, closing the battery electronic expansion valve, and triggering the condenser fan to stop running; and if the battery electronic expansion valve is in a closed state, the cabin electromagnetic valve is in an open state, and the closing instruction of the cabin electromagnetic valve is detected, triggering the compressor motor to stop running, closing the cabin electromagnetic valve and triggering the condenser fan to stop running.
The current cabin temperature and the power battery temperature are obtained; determining the opening state of the electronic expansion valve according to the temperature of the power battery, and adjusting the rotating speed of the air compressor according to the opening state so as to enable the temperature of the power battery to reach the preset temperature; acquiring an opening instruction of a cabin electromagnetic valve; adjusting the rotating speed of the air conditioner compressor according to the opening instruction, the current cabin temperature and the target cabin temperature so as to enable the temperature of the cabin to reach the target cabin temperature; when the temperature of the vehicle cabin reaches the target vehicle cabin temperature and the temperature of the power battery reaches the preset temperature, the electromagnetic valve and the electronic expansion valve are closed, and the air-conditioning compressor motor is controlled to stop running. The embodiment can respectively open the corresponding cabin electromagnetic valve and the battery electronic expansion valve through the detected cabin refrigeration request signal and the battery cooling request signal, and trigger the operation of the condenser fan and the starting of the compressor motor, so that the requirement for double cooling of the cabin and/or the battery is met, and the temperature regulation is more accurate.
Referring to fig. 3, fig. 3 is a schematic flow chart of a battery thermal management control method according to a second embodiment of the present invention, and the second embodiment of the battery thermal management control method according to the present invention is proposed based on the first embodiment shown in fig. 2.
In the second embodiment, the step S20 includes:
step 201, when the temperature of the power battery is higher than a preset temperature, determining the opening of the electronic expansion valve according to the temperature difference between the temperature of the power battery and the preset temperature.
It should be noted that the temperature difference may be an absolute value of a difference between the power battery temperature and the preset temperature, for example: the temperature of the power battery is 50 ℃, and the preset temperature is 30 ℃, namely, a temperature difference of 20 ℃ exists, namely, the temperature of the power battery needs to be reduced to 30 ℃.
It will be appreciated that the opening of the electronic expansion valve may be adjusted according to the temperature difference, the evaporation temperature gradually increasing as the opening of the expansion valve increases.
In the concrete implementation, the air conditioner controller receives a battery compartment refrigeration requirement sent by the vehicle controller, the air conditioner controller controls the opening of the electronic expansion valve of the battery, the electromagnetic valve of the vehicle compartment is closed, and the opening of the electronic expansion valve is controlled according to the opening requirement fed back by the vehicle-mounted computer.
Step 202: and opening the electronic expansion valve according to the opening degree of the electronic expansion valve, and adjusting the rotating speed of the air compressor according to the opening degree of the electronic expansion valve so as to enable the temperature of the power battery to reach the preset temperature.
In the concrete implementation, the vehicle-mounted computer controls the electronic expansion valve after acquiring the opening degree of the electronic expansion valve, sends a starting signal to the condenser fan, triggers the condenser fan to operate and sends a condenser fan state signal to the compressor controller, and the compressor controller triggers the compressor motor to start after determining that the condenser fan is in an operating state according to the condenser fan state signal, and controls the operating speed of the compressor motor according to the temperature difference and the actual temperature of the battery.
Further, the step 202 includes: opening the electronic expansion valve according to the opening of the electronic expansion valve, and searching the rotating speed of the air conditioner compressor corresponding to the opening of the electronic expansion valve according to a preset rotating speed mapping table; and adjusting the air conditioner compressor according to the rotating speed of the air conditioner compressor so as to enable the temperature of the power battery to reach the preset temperature.
It should be noted that the preset rotation speed mapping table may be a corresponding relationship between the rotation speed of the compressor and the opening of the electronic expansion valve.
It can be understood that the preset temperature may be a temperature corresponding to a temperature range when the power battery normally operates, for example: the temperature range of the power battery is-10 ℃ to-30 ℃ when the power battery normally operates, that is, the preset temperature can be any temperature value of-10 ℃ to 30 ℃, and can also be any temperature range, for example: the preset temperature may be set to 10 deg.c or 0 deg.c-10 deg.c.
In specific implementation, the vehicle-mounted computer can search the rotating speed corresponding to the opening of the electronic expansion valve according to a preset rotating speed mapping table, trigger the compressor motor to start according to the corresponding rotating speed, and control the running speed of the compressor motor so as to enable the temperature of the power battery to reach the preset temperature.
Further, after the step S50, the method further includes: acquiring vehicle working condition information; and sending a control instruction to the air-conditioning compressor according to the vehicle working condition information and a preset emergency strategy so that the air-conditioning compressor adjusts the current rotating speed according to the control instruction.
It should be noted that the vehicle-mounted computer may obtain vehicle operating condition information through the vehicle controller, where the vehicle operating condition information may refer to operating state information of each hardware of the vehicle and system operating state information.
It can be understood that the preset emergency strategy may refer to a control strategy corresponding to the real-time power of the electric equipment of the entire vehicle, for example: determining whether the current electrical equipment is in an overload or negative pressure state according to the real-time power information and preset power (such as upper limit power) of the vehicle electrical equipment, and adjusting the working state of the electrical equipment when the electrical equipment is in the overload or negative pressure state.
In the specific implementation, the vehicle-mounted computer can detect the working condition of the vehicle in real time through the vehicle controller, and sends an air conditioner prohibition instruction or a power limit instruction to the compressor controller according to a preset emergency strategy after detecting that the vehicle is in a severe working condition; the emergency strategy can arbitrate power redistribution of the electric equipment of the whole vehicle according to the working condition of the vehicle; the compressor controller can suspend the real-time detection of the opening instructions of the cabin evaporator electromagnetic valve and the battery evaporator electromagnetic valve when the cabin evaporator electromagnetic valve and the battery evaporator electromagnetic valve are both in a closed state and after the air conditioner prohibition instruction is received; when a cabin evaporator electromagnetic valve and/or a battery evaporator electromagnetic valve are/is in an open state and an air conditioner prohibition instruction is received, triggering a compressor motor to stop running, triggering the cabin evaporator electromagnetic valve and/or the battery evaporator electromagnetic valve to close, and sending a condenser fan stop request signal to the vehicle controller; and controlling the compressor motor to operate in the upper limit rotating speed according to the preset upper limit rotating speed when the cabin evaporator electromagnetic valve and/or the battery evaporator electromagnetic valve are in an open state and the power limit instruction is received.
The current cabin temperature and the power battery temperature are obtained; when the temperature of the power battery is higher than a preset temperature, determining the opening degree of the electronic expansion valve according to the temperature difference between the temperature of the power battery and the preset temperature; opening the electronic expansion valve according to the opening degree of the electronic expansion valve, and adjusting the rotating speed of the air compressor according to the opening degree of the electronic expansion valve so as to enable the temperature of the power battery to reach a preset temperature and obtain an opening instruction of the cabin electromagnetic valve; adjusting the rotating speed of the air conditioner compressor according to the opening instruction, the current cabin temperature and the target cabin temperature so as to enable the temperature of the cabin to reach the target cabin temperature; when the temperature of the vehicle cabin reaches the target vehicle cabin temperature and the temperature of the power battery reaches the preset temperature, the electromagnetic valve and the electronic expansion valve are closed, and the air-conditioning compressor motor is controlled to stop running. The embodiment can respectively open the corresponding cabin electromagnetic valve and the battery electronic expansion valve through the detected cabin refrigeration request signal and the battery cooling request signal, and trigger the operation of the condenser fan and the starting of the compressor motor, so that the requirement for double cooling of the cabin and/or the battery is met, and the temperature regulation is more accurate.
Referring to fig. 4, fig. 4 is a schematic flow chart of a battery thermal management control method according to a third embodiment of the present invention, and the third embodiment of the battery thermal management control method according to the present invention is proposed based on the first embodiment shown in fig. 2.
In the third embodiment, the step S20 includes: when the temperature of the power battery is lower than a preset battery frosting temperature, determining the opening degree of the electronic expansion valve according to the temperature difference between the temperature of the power battery and the preset frosting protection temperature; and opening the electronic expansion valve according to the opening degree of the electronic expansion valve, and adjusting the rotating speed of the air compressor according to the opening degree of the electronic expansion valve so as to enable the temperature of the power battery to reach the preset temperature.
It should be noted that the preset battery frosting temperature may refer to a temperature corresponding to a freezing point of the power battery electrolyte in a low-temperature environment of the battery, that is, when the temperature in the low-temperature environment reaches the freezing point of the power battery electrolyte, the power battery may be frosted.
It can be understood that the electronic expansion valve may determine, according to the temperature difference, a reduction value of the current opening degree of the electronic expansion valve compared to the opening degree thereof under the normal non-frosting operating condition or a proportional relationship between the reduction value and the opening degree of the tweet expansion valve under the normal non-frosting operating condition, as a condition for judging the start of the defrosting operation.
In specific implementation, the vehicle-mounted computer can judge whether to enter a battery defrosting protection mode according to the temperature of the power battery, and when the temperature of the power battery is lower than a preset battery frosting temperature, the opening of the electronic expansion valve is determined according to the temperature difference between the temperature of the power battery and the preset frosting protection temperature; and opening the electronic expansion valve according to the opening degree of the electronic expansion valve, and adjusting the rotating speed of the air compressor according to the opening degree of the electronic expansion valve so as to enable the temperature of the power battery to reach the preset temperature.
Further, after the step S50, the method further includes: when the current power battery temperature is lower than a preset battery frosting temperature and the cabin temperature is lower than the preset cabin frosting temperature, the air conditioner compressor is adjusted to a preset low-speed working mode, and the opening of a cabin electromagnetic valve and the opening of a battery electronic expansion valve are determined according to the preset battery frosting temperature and the preset cabin frosting temperature; and adjusting the rotating speed of the air conditioner compressor according to the opening degree of the cabin electromagnetic valve and the opening degree of the battery electronic expansion valve.
It should be noted that the preset frosting temperature of the battery may refer to a temperature that may cause frosting when the temperature of the battery is lower than a certain temperature in a low-temperature environment, for example: when the temperature of the water inlet of the battery pack is less than or equal to 15 ℃, the surface of the current power battery is considered to be frosted. The preset cabin frosting temperature may be a temperature at which the cabin air conditioner causes frosting in a low temperature environment for a long time.
It can be understood that the preset low-speed operation mode may be to reduce the rotation speed of the air-conditioning compressor to a preset low speed for operation, for example: when the temperature of the water inlet of the battery pack is less than or equal to 15 ℃, the surface of the current power battery is considered to be frosted, namely the rotating speed of the compressor is controlled to be reduced to 1200 rpm.
It should be understood that, when the battery is cooled and frosted, the vehicle-mounted computer enters a battery cooling and frosting protection mode, and determines the current battery state according to the temperature of the water inlet and outlet of the battery, for example: when the temperature of the water inlet of the battery pack is less than or equal to 15 ℃, the surface of the battery cooler is frosted, the rotating speed of the compressor is reduced to 1200rpm at the minimum, and when the temperature of the water inlet is more than or equal to 20 ℃, the battery cooling frosting protection is removed.
In the concrete implementation, battery cooling and cabin cooling are carried out simultaneously, one frosts, closes corresponding solenoid valve or electronic expansion valve, enters the independent mode, but the AC indicator light state is unchanged, if all enter evaporation protection, the compressor enters low-speed operation, the speed of rotation is 1200rpm, both the solenoid valve and the expansion valve are opened, and the opening degree of the expansion valve can be controlled according to the opening requirement fed back by the vehicle-mounted computer.
In this embodiment, before the step S50, the method further includes:
and step S510, acquiring the working condition information of the air conditioner compressor.
It should be noted that the operating condition information may include operating condition information of the compressor of the air conditioning system, and the operating condition information may refer to information about a rotation speed of the compressor of the air conditioning system when the compressor is turned on.
It can be understood that the condition information of the air conditioner compressor can be determined according to the temperature of the power battery and the temperature of the vehicle cabin, for example: when the temperature of the power battery is too high and needs to be reduced, the temperature can be reduced through the air conditioner compressor, and when the temperature of the vehicle cabin is higher than the preset temperature, the temperature can be reduced through the air conditioner compressor.
In concrete implementation, the vehicle-mounted computer can acquire the working condition information of the air conditioner compressor according to the air conditioner controller.
Step S520: and determining a speed reduction threshold value of the air-conditioning compressor according to the rotating speed information contained in the working condition information and a preset noise step mapping table.
It should be noted that the preset noise step mapping table may include a corresponding relationship between the rotation speed of the air conditioner compressor and the noise decibel, for example: the rotating speed range of the compressor is 0-5500, and the noise is very large at 4500-5500, namely the noise steps are different according to different rotating speeds.
It can be understood that the speed reduction threshold may be a threshold corresponding to stepped speed reduction of the compressor according to a preset noise step mapping table in order to avoid an excessive noise drop when the speed of the compressor is reduced.
In the concrete implementation, the vehicle-mounted computer acquires the current rotating speed of the compressor according to the compressor controller, and determines the speed reduction threshold according to a preset noise step mapping table.
Step S530: and matching the rotating speed of the air conditioner compressor according to the speed reduction threshold value, and reducing the speed of the air conditioner compressor according to a matching result.
It should be noted that the matching result may be a corresponding rotation speed when the air conditioner compressor is stepped down according to the speed reduction threshold.
In the concrete implementation, the vehicle-mounted computer matches the rotating speed of the air conditioner compressor according to the speed reduction threshold value, and reduces the speed of the air conditioner compressor according to the matching result, so that the noise fall is reduced, and the user experience is improved.
In the embodiment, the current cabin temperature and the power battery temperature are obtained; determining the opening state of the electronic expansion valve according to the temperature of the power battery, and adjusting the rotating speed of the air compressor according to the opening state so as to enable the temperature of the power battery to reach the preset temperature; acquiring an opening instruction of a cabin electromagnetic valve; adjusting the rotating speed of the air conditioner compressor according to the opening instruction, the current cabin temperature and the target cabin temperature so as to enable the temperature of the cabin to reach the target cabin temperature; acquiring working condition information of an air conditioner compressor; determining a speed reduction threshold value of the air-conditioning compressor according to the rotating speed information contained in the working condition information and a preset noise step mapping table; and matching the rotating speed of the air conditioner compressor according to the speed reduction threshold value, and reducing the speed of the air conditioner compressor according to a matching result. When the temperature of the vehicle cabin reaches the target vehicle cabin temperature and the temperature of the power battery reaches the preset temperature, the electromagnetic valve and the electronic expansion valve are closed, and the air-conditioning compressor motor is controlled to stop running. The embodiment can respectively open the corresponding cabin electromagnetic valve and the battery electronic expansion valve through the detected cabin refrigeration request signal and the battery cooling request signal, and trigger the operation of the condenser fan and the starting of the compressor motor, so that the requirement for double cooling of the cabin and/or the battery is met, and the temperature regulation is more accurate.
In addition, an embodiment of the present invention further provides a storage medium, where a battery thermal management control program is stored on the storage medium, and the battery thermal management control program, when executed by a processor, implements the steps of the battery thermal management control method described above.
Referring to fig. 5, fig. 5 is a block diagram illustrating a first embodiment of a battery thermal management control apparatus according to the present invention.
As shown in fig. 5, a battery thermal management control apparatus according to an embodiment of the present invention includes:
the temperature acquisition module 10 is used for acquiring the current cabin temperature and the power battery temperature;
the rotating speed adjusting module 20 is used for determining the opening state of the electronic expansion valve according to the temperature of the power battery, and adjusting the rotating speed of the air compressor according to the opening state so as to enable the temperature of the power battery to reach a preset temperature;
an instruction fetch module 30. The system is used for acquiring an opening instruction of the cabin electromagnetic valve;
the rotating speed adjusting module 20 is further configured to adjust the rotating speed of the air conditioner compressor according to the opening instruction, the current cabin temperature and the target cabin temperature, so that the temperature of the cabin reaches the target cabin temperature;
and the air conditioner control module 40 is used for closing the electromagnetic valve and the electronic expansion valve and controlling the motor of the air conditioner compressor to stop running when the temperature of the vehicle cabin reaches the target vehicle cabin temperature and the temperature of the power battery reaches the preset temperature.
In the embodiment, the current cabin temperature and the power battery temperature are obtained; determining the opening state of the electronic expansion valve according to the temperature of the power battery, and adjusting the rotating speed of the air compressor according to the opening state so as to enable the temperature of the power battery to reach the preset temperature; acquiring an opening instruction of a cabin electromagnetic valve; adjusting the rotating speed of the air conditioner compressor according to the opening instruction, the current cabin temperature and the target cabin temperature so as to enable the temperature of the cabin to reach the target cabin temperature; when the temperature of the vehicle cabin reaches the target vehicle cabin temperature and the temperature of the power battery reaches the preset temperature, the electromagnetic valve and the electronic expansion valve are closed, and the air-conditioning compressor motor is controlled to stop running. The embodiment can respectively open the corresponding cabin electromagnetic valve and the battery electronic expansion valve through the detected cabin refrigeration request signal and the battery cooling request signal, and trigger the operation of the condenser fan and the starting of the compressor motor, so that the requirement for double cooling of the cabin and/or the battery is met, and the temperature regulation is more accurate.
Further, the rotation speed adjusting module 20 is further configured to determine an opening degree of the electronic expansion valve according to a temperature difference between the temperature of the power battery and a preset temperature when the temperature of the power battery is higher than the preset temperature; and opening the electronic expansion valve according to the opening degree of the electronic expansion valve, and adjusting the rotating speed of the air compressor according to the opening degree of the electronic expansion valve so as to enable the temperature of the power battery to reach the preset temperature.
Further, the rotation speed adjusting module 20 is further configured to open the electronic expansion valve according to the opening of the electronic expansion valve, and search for the rotation speed of the air conditioner compressor corresponding to the opening of the electronic expansion valve according to a preset rotation speed mapping table; and adjusting the air conditioner compressor according to the rotating speed of the air conditioner compressor so as to enable the temperature of the power battery to reach the preset temperature.
Further, the battery thermal management control device further includes: an emergency adjustment module; the emergency adjusting module is used for acquiring vehicle working condition information; and sending a control instruction to the air-conditioning compressor according to the vehicle working condition information and a preset emergency strategy so that the air-conditioning compressor adjusts the current rotating speed according to the control instruction.
Further, the rotation speed adjusting module 20 is further configured to determine an opening degree of the electronic expansion valve according to a temperature difference between the power battery temperature and a preset frosting protection temperature when the power battery temperature is lower than the preset battery frosting temperature; and opening the electronic expansion valve according to the opening degree of the electronic expansion valve, and adjusting the rotating speed of the air compressor according to the opening degree of the electronic expansion valve so as to enable the temperature of the power battery to reach the preset temperature.
Further, the battery thermal management control device further includes: the defrosting adjusting module is used for adjusting the air conditioner compressor to a preset low-speed working mode when the current power battery temperature is lower than a preset battery frosting temperature and the cabin temperature is lower than a preset cabin frosting temperature, and determining the opening of a cabin electromagnetic valve and the opening of a battery electronic expansion valve according to the preset battery frosting temperature and the preset cabin frosting temperature; and adjusting the rotating speed of the air conditioner compressor according to the opening degree of the cabin electromagnetic valve and the opening degree of the battery electronic expansion valve.
Further, the battery thermal management control device further includes: the noise adjusting module is used for acquiring working condition information of the air-conditioning compressor; determining a speed reduction threshold value of the air-conditioning compressor according to the rotating speed information contained in the working condition information and a preset noise step mapping table; and matching the rotating speed of the air conditioner compressor according to the speed reduction threshold value, and reducing the speed of the air conditioner compressor according to a matching result.
In addition, an embodiment of the present invention further provides a storage medium, where a battery thermal management control program is stored on the storage medium, and the battery thermal management control program, when executed by a processor, implements the steps of the battery thermal management control method described above.
It should be understood that the above is only an example, and the technical solution of the present invention is not limited in any way, and in a specific application, a person skilled in the art may set the technical solution as needed, and the present invention is not limited thereto.
It should be noted that the above-described work flows are only exemplary, and do not limit the scope of the present invention, and in practical applications, a person skilled in the art may select some or all of them to achieve the purpose of the solution of the embodiment according to actual needs, and the present invention is not limited herein.
In addition, the technical details that are not described in detail in this embodiment may be referred to a battery thermal management control method provided in any embodiment of the present invention, and are not described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system 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 system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third, etc. do not denote any order, but rather the words first, second, third, etc. are to be interpreted as names.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention or portions thereof that contribute to the prior art may be embodied in the form of a software product, where the computer software product is stored in a storage medium (e.g., a Read Only Memory (ROM)/Random Access Memory (RAM), a magnetic disk, an optical disk), and includes several instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. A battery thermal management control method is characterized by comprising the following steps:
acquiring the current cabin temperature and the power battery temperature;
determining the opening state of the electronic expansion valve according to the temperature of the power battery, and adjusting the rotating speed of the air compressor according to the opening state so as to enable the temperature of the power battery to reach the preset temperature;
acquiring an opening instruction of a cabin electromagnetic valve;
adjusting the rotating speed of the air conditioner compressor according to the opening instruction, the current cabin temperature and the target cabin temperature so as to enable the temperature of the cabin to reach the target cabin temperature;
and when the temperature of the cabin reaches the target cabin temperature and the temperature of the power battery reaches the preset temperature, closing the electromagnetic valve and the electronic expansion valve, and controlling the motor of the air-conditioning compressor to stop running.
2. The battery thermal management control method according to claim 1, wherein the step of determining an opening state of the electronic expansion valve according to the temperature of the power battery, and adjusting the rotation speed of the air-conditioning compressor according to the opening state so as to enable the temperature of the power battery to reach a preset temperature comprises the following steps:
when the temperature of the power battery is higher than a preset temperature, determining the opening degree of the electronic expansion valve according to the temperature difference between the temperature of the power battery and the preset temperature;
and opening the electronic expansion valve according to the opening degree of the electronic expansion valve, and adjusting the rotating speed of the air compressor according to the opening degree of the electronic expansion valve so as to enable the temperature of the power battery to reach the preset temperature.
3. The battery thermal management control method according to claim 2, wherein the step of opening the electronic expansion valve according to the opening degree of the electronic expansion valve and adjusting the rotating speed of the air-conditioning compressor according to the opening degree of the electronic expansion valve so as to enable the temperature of the power battery to reach the preset temperature comprises the following steps:
opening the electronic expansion valve according to the opening of the electronic expansion valve, and searching the rotating speed of the air conditioner compressor corresponding to the opening of the electronic expansion valve according to a preset rotating speed mapping table;
and adjusting the air conditioner compressor according to the rotating speed of the air conditioner compressor so as to enable the temperature of the power battery to reach the preset temperature.
4. The battery thermal management control method according to claim 1, wherein after the steps of closing the solenoid valve and the electronic expansion valve and controlling the air conditioner compressor motor to stop operating when the temperature of the cabin reaches the target cabin temperature and the temperature of the power battery reaches a preset temperature, the method further comprises:
acquiring vehicle working condition information;
and sending a control instruction to the air-conditioning compressor according to the vehicle working condition information and a preset emergency strategy so that the air-conditioning compressor adjusts the current rotating speed according to the control instruction.
5. The battery thermal management control method according to claim 1, wherein the step of determining an opening state of the electronic expansion valve according to the temperature of the power battery, and adjusting the rotation speed of the air-conditioning compressor according to the opening state so as to enable the temperature of the power battery to reach a preset temperature comprises the following steps:
when the temperature of the power battery is lower than a preset battery frosting temperature, determining the opening degree of the electronic expansion valve according to the temperature difference between the temperature of the power battery and the preset frosting protection temperature;
and opening the electronic expansion valve according to the opening degree of the electronic expansion valve, and adjusting the rotating speed of the air compressor according to the opening degree of the electronic expansion valve so as to enable the temperature of the power battery to reach the preset temperature.
6. The battery thermal management control method according to claim 5, wherein after the steps of closing the solenoid valve and the electronic expansion valve and controlling the air conditioner compressor motor to stop operating when the temperature of the cabin reaches the target cabin temperature and the temperature of the power battery reaches a preset temperature, the method further comprises:
when the current power battery temperature is lower than a preset battery frosting temperature and the cabin temperature is lower than the preset cabin frosting temperature, the air conditioner compressor is adjusted to a preset low-speed working mode, and the opening of a cabin electromagnetic valve and the opening of a battery electronic expansion valve are determined according to the preset battery frosting temperature and the preset cabin frosting temperature;
and adjusting the rotating speed of the air conditioner compressor according to the opening degree of the cabin electromagnetic valve and the opening degree of the battery electronic expansion valve.
7. The battery thermal management control method according to claim 1, wherein before the steps of closing the solenoid valve and the electronic expansion valve and controlling the air conditioner compressor motor to stop operating when the temperature of the cabin reaches the target cabin temperature and the temperature of the power battery reaches a preset temperature, the method further comprises:
acquiring working condition information of an air conditioner compressor;
determining a speed reduction threshold value of the air-conditioning compressor according to the rotating speed information contained in the working condition information and a preset noise step mapping table;
and matching the rotating speed of the air conditioner compressor according to the speed reduction threshold value, and reducing the speed of the air conditioner compressor according to a matching result.
8. A battery thermal management control apparatus, characterized in that the battery thermal management control apparatus comprises: a memory, a processor, and a battery thermal management control program stored on the memory and executable on the processor, the battery thermal management control program when executed by the processor implementing the steps of the battery thermal management control method of any of claims 1-7.
9. A storage medium having stored thereon a battery thermal management control program which, when executed by a processor, implements the steps of the battery thermal management control method according to any one of claims 1 to 7.
10. A battery thermal management control apparatus, comprising:
the temperature acquisition module is used for acquiring the current cabin temperature and the power battery temperature;
the rotating speed adjusting module is used for determining the opening state of the electronic expansion valve according to the temperature of the power battery and adjusting the rotating speed of the air compressor according to the opening state so as to enable the temperature of the power battery to reach the preset temperature;
and an instruction acquisition module. The system is used for acquiring an opening instruction of the cabin electromagnetic valve;
the rotating speed adjusting module is further used for adjusting the rotating speed of the air conditioner compressor according to the opening instruction, the current cabin temperature and the target cabin temperature so that the temperature of the cabin reaches the target cabin temperature;
and the air conditioner control module is used for closing the electromagnetic valve and the electronic expansion valve when the temperature of the vehicle cabin reaches the target vehicle cabin temperature and the temperature of the power battery reaches the preset temperature, and controlling the motor of the air conditioner compressor to stop running.
CN202011426363.3A 2020-12-08 2020-12-08 Battery thermal management control method, equipment, storage medium and device Pending CN112455185A (en)

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