CN111326825A - Battery pack cooling control method and device, computer equipment and storage medium - Google Patents

Battery pack cooling control method and device, computer equipment and storage medium Download PDF

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Publication number
CN111326825A
CN111326825A CN202010139708.0A CN202010139708A CN111326825A CN 111326825 A CN111326825 A CN 111326825A CN 202010139708 A CN202010139708 A CN 202010139708A CN 111326825 A CN111326825 A CN 111326825A
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Prior art keywords
current
cooling
battery pack
control valve
target
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CN202010139708.0A
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CN111326825B (en
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王磊
张舟
刘昨非
刘颖
陈瑞恒
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FAW Volkswagen Automotive Co Ltd
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FAW Volkswagen Automotive Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • 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
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • 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

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Automation & Control Theory (AREA)
  • Secondary Cells (AREA)

Abstract

The application relates to a battery pack cooling control method and device, computer equipment and a storage medium. The method comprises the following steps: acquiring the current working temperature corresponding to the current battery pack; determining a target cooling circulation mode from the candidate cooling circulation modes according to the current working temperature, wherein the target cooling circulation mode comprises a target control state corresponding to the current battery pack cooling control valve; acquiring a current control state corresponding to a current battery pack cooling control valve; determining a current working state corresponding to the current battery pack cooling control valve according to the current control state and the target control state; and if the current working state corresponding to the current battery pack cooling control valve is the normal working state, cooling the current battery pack through the target cooling equipment in the target cooling circulation mode. By adopting the method, the target cooling circulation mode can be selected in a self-adaptive mode according to the current working temperature of the battery pack.

Description

Battery pack cooling control method and device, computer equipment and storage medium
Technical Field
The present application relates to the field of computer technologies, and in particular, to a method and an apparatus for controlling cooling of a battery pack, a computer device, and a storage medium.
Background
The battery system is used as a core component of the pure electric vehicle, is the only power source of the pure electric vehicle, and plays a decisive role in the working performance of the electric vehicle. When the vehicle runs under different running conditions of alternating high speed, low speed, acceleration, deceleration and the like, the battery is discharged at different rates, a large amount of heat is generated at different heat generation rates, and if time accumulation and space influence are added, the large amount of heat is accumulated, so that the temperature of the battery pack rises. The temperature rise within the package can severely affect the operation, cycle life and charge acceptability, package power and energy, safety and reliability of the electrochemical system of the battery.
In the conventional technology, the battery pack is cooled in a feedback mode, that is, when the temperature rises to a certain value, the air conditioner starts to operate to cool the battery pack. However, the battery pack can only be cooled by the cooling mode of the air conditioner, so that the energy consumption of the whole vehicle is easily increased, the performance of the electric vehicle is reduced, and the cooling mode is single.
Disclosure of Invention
In view of the above, it is desirable to provide a battery pack cooling control method, apparatus, computer device, and storage medium capable of adaptively selecting a target cooling cycle manner for cooling according to a current operating temperature of a battery pack.
A battery pack cooling control method, the method comprising:
acquiring the current working temperature corresponding to the current battery pack;
determining a target cooling circulation mode from the candidate cooling circulation modes according to the current working temperature, wherein the target cooling circulation mode comprises a target control state corresponding to the current battery pack cooling control valve;
acquiring a current control state corresponding to a current battery pack cooling control valve;
determining a current working state corresponding to the current battery pack cooling control valve according to the current control state and the target control state;
and if the current working state corresponding to the current battery pack cooling control valve is the normal working state, cooling the current battery pack through the target cooling equipment in the target cooling circulation mode.
In one embodiment, the battery pack cooling control method further includes: and if the current working state corresponding to the current battery pack cooling control valve is an abnormal working state, sending current working abnormal information corresponding to the current battery pack, wherein the current working abnormal information is used for reminding the current battery pack of abnormal cooling.
In one embodiment, the step of detecting that the current working state corresponding to the current battery pack cooling control valve is an abnormal working state includes: obtaining a circuit structure corresponding to a current battery pack cooling control valve, wherein the circuit structure comprises a cooling control valve control loop and a control circuit; when the cooling control valve control loop is short-circuited to the positive electrode of the control circuit, determining that the current working state corresponding to the current battery pack cooling control valve is an abnormal working state and/or; and when the control loop of the cooling control valve is open, determining that the current working state corresponding to the current battery pack cooling control valve is an abnormal working state.
In one embodiment, the battery pack cooling control method further includes: when the cooling control valve control loop is short-circuited to the ground, determining that the current working state corresponding to the current battery pack cooling control valve is an abnormal working state, and/or; detecting whether a current battery pack cooling control valve is locked at a target mechanical position due to mechanical faults, wherein the target mechanical position is a closed mechanical position or an open mechanical position; and when the current battery pack cooling control valve is detected to be locked at the target mechanical position due to mechanical faults, determining that the current working state corresponding to the current battery pack cooling control valve is an abnormal working state.
In one embodiment, when it is detected that the current battery pack cooling control valve is locked at the target mechanical position due to a mechanical failure, the method includes: acquiring a current running speed, wherein the current running speed is the current running speed corresponding to the current equipment provided with the current battery pack; acquiring a first cooling liquid temperature corresponding to a first cooling circulation mode; acquiring second cooling liquid temperature corresponding to the second cooling circulation mode; calculating to obtain a first cooling liquid temperature difference according to the current running speed, the first cooling liquid and the second cooling liquid temperature; and when the first coolant temperature difference is larger than a first preset coolant temperature difference, determining that the current battery pack cooling control valve is locked at the target mechanical position due to mechanical faults.
In one embodiment, when it is detected that the current battery pack cooling control valve is locked at the target mechanical position due to a mechanical failure, the method includes: acquiring a first cooling liquid temperature corresponding to a first cooling circulation mode; acquiring second cooling liquid temperature corresponding to the second cooling circulation mode; calculating a second cooling liquid temperature difference according to the first cooling liquid temperature and the second cooling liquid temperature; when the second cooling liquid temperature difference is larger than a second preset cooling liquid temperature difference, recording through a first counter to obtain a first current count value corresponding to the first counter; when the second cooling liquid temperature difference is smaller than a second preset cooling liquid temperature difference, recording through a second counter to obtain a second current count value corresponding to the second counter; calculating to obtain a current total count value according to the first current count value and the second current count value; if the current total count value is larger than the preset count value threshold, calculating a current count ratio according to the first current count value and the current total count value; and if the current counting ratio is larger than the preset counting ratio, determining that the current battery pack cooling control valve is locked at the target mechanical position due to mechanical faults.
In one embodiment, determining a target cooling cycle style from the candidate cooling cycle styles based on the current operating temperature includes: acquiring a first preset battery pack working temperature threshold and a second preset battery pack working temperature threshold, wherein the first preset battery pack working temperature threshold is smaller than the second preset battery pack working temperature threshold; and if the current working temperature is greater than a first preset battery pack working temperature threshold value, taking the first cooling circulation mode as a target cooling circulation mode from the candidate cooling circulation modes.
In one embodiment, determining the target cooling cycle mode from the candidate cooling cycle modes according to the current operating temperature further includes: when the target cooling circulation mode is the first cooling circulation mode, cooling the current battery pack through first cooling equipment in the first cooling circulation mode, obtaining the working temperature of the cooled battery pack corresponding to the cooled current battery pack, and if the working temperature of the cooled battery pack is larger than a second preset battery pack working temperature threshold value, switching the target cooling circulation mode from the first cooling circulation mode to the second cooling circulation mode, wherein the candidate cooling circulation modes comprise the first cooling circulation mode and the second cooling circulation mode.
In one embodiment, the step of detecting that the current working state corresponding to the current battery pack cooling control valve is the normal working state includes: and if the current control state is matched with the target control state, determining that the current working state corresponding to the current battery pack cooling control valve is a normal working state.
A battery pack cooling control apparatus, the apparatus comprising:
the battery pack working temperature acquisition module is used for acquiring the current working temperature corresponding to the current battery pack;
the cooling circulation mode determining module is used for determining a target cooling circulation mode from the candidate cooling circulation modes according to the current working temperature, wherein the target cooling circulation mode comprises a target control state corresponding to the current battery pack cooling control valve;
the cooling control valve control state determining module is used for acquiring the current control state corresponding to the current battery pack cooling control valve;
the cooling control valve working state determining module is used for determining the current working state corresponding to the current battery pack cooling control valve according to the current control state and the target control state;
and the battery pack cooling module is used for cooling the current battery pack through the target cooling equipment in the target cooling circulation mode if the current working state corresponding to the current battery pack cooling control valve is the normal working state.
A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the following steps when executing the computer program:
acquiring the current working temperature corresponding to the current battery pack;
determining a target cooling circulation mode from the candidate cooling circulation modes according to the current working temperature, wherein the target cooling circulation mode comprises a target control state corresponding to the current battery pack cooling control valve;
acquiring a current control state corresponding to a current battery pack cooling control valve;
determining a current working state corresponding to the current battery pack cooling control valve according to the current control state and the target control state;
and if the current working state corresponding to the current battery pack cooling control valve is the normal working state, cooling the current battery pack through the target cooling equipment in the target cooling circulation mode.
A computer-readable storage medium, on which a computer program is stored which, when executed by a processor, carries out the steps of:
acquiring the current working temperature corresponding to the current battery pack;
determining a target cooling circulation mode from the candidate cooling circulation modes according to the current working temperature, wherein the target cooling circulation mode comprises a target control state corresponding to the current battery pack cooling control valve;
acquiring a current control state corresponding to a current battery pack cooling control valve;
determining a current working state corresponding to the current battery pack cooling control valve according to the current control state and the target control state;
and if the current working state corresponding to the current battery pack cooling control valve is the normal working state, cooling the current battery pack through the target cooling equipment in the target cooling circulation mode.
According to the battery pack cooling control method and device, the computer equipment and the storage medium, the current working temperature corresponding to the current battery pack is obtained; determining a target cooling circulation mode from the candidate cooling circulation modes according to the current working temperature, wherein the target cooling circulation mode comprises a target control state corresponding to the current battery pack cooling control valve; acquiring a current control state corresponding to a current battery pack cooling control valve; determining a current working state corresponding to the current battery pack cooling control valve according to the current control state and the target control state; and if the current working state corresponding to the current battery pack cooling control valve is the normal working state, cooling the current battery pack through the target cooling equipment in the target cooling circulation mode.
Therefore, the target cooling circulation mode can be determined from the candidate cooling circulation modes in a self-adaptive mode according to the current working temperature of the current battery pack for cooling, whether the current battery pack cooling control valve is correct or not is judged by judging the target control state and the current control state of the current battery pack cooling control valve in the target cooling circulation mode, if the current battery pack cooling control valve is correct, the target cooling equipment in the target cooling circulation mode is used for cooling, otherwise, the target cooling circulation mode is replaced from the candidate cooling circulation mode, the cooling circulation mode is switched through the battery pack cooling control valve, and the cooling circulation mode is selected in a self-adaptive mode for cooling, so that the best cooling effect is achieved.
Drawings
FIG. 1 is a diagram of an exemplary embodiment of a battery pack cooling control method;
FIG. 2 is a flow chart illustrating a method for controlling cooling of a battery pack according to an embodiment;
FIG. 2A is a schematic diagram of an alternate cooling cycle in one embodiment;
FIG. 3 is a schematic flow chart illustrating the current operation status detection procedure for the battery pack cooling control valve according to one embodiment;
FIG. 4 is a schematic flow chart showing the current operation state detection procedure of the cooling control valve for the battery pack in another embodiment;
FIG. 5 is a flowchart illustrating the current steps for detecting whether the battery pack cooling control valve is locked in a target mechanical position, according to one embodiment;
FIG. 6 is a flowchart illustrating the steps of detecting whether the current battery pack cooling control valve is locked in the target mechanical position according to another embodiment;
FIG. 7 is a flowchart illustrating the target cooling cycle pattern determining step in one embodiment;
FIG. 8 is a block diagram showing the structure of a cooling control device for a battery pack according to an embodiment;
FIG. 9 is a diagram showing an internal structure of a computer device in one embodiment;
FIG. 10 is a diagram showing an internal structure of a computer device according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The battery pack cooling control method provided by the application can be applied to the application environment shown in fig. 1. Wherein the terminal 102 communicates with the server 104 via a network. The terminal 102 may be, but not limited to, various personal computers, notebook computers, smart phones, tablet computers, and portable wearable devices, and the server 104 may be implemented by an independent server or a server cluster formed by a plurality of servers.
Specifically, the terminal 102 installs a current battery pack, obtains a current operating temperature corresponding to the current battery pack, and sends the current operating temperature to the server 104 through the network. After receiving the current working temperature, the server 104 determines a target cooling circulation mode from the candidate cooling circulation modes according to the current working temperature, where the target cooling circulation mode includes a target control state corresponding to the current battery pack cooling control valve, obtains a current control state corresponding to the current battery pack cooling control valve, determines a current working state corresponding to the current battery pack cooling control valve according to the current control state and the target control state, and informs the terminal 102 of the target cooling circulation mode if the current working state corresponding to the current battery pack cooling control valve is a normal working state, and the terminal 102 may cool the current battery pack through target cooling equipment in the target cooling circulation mode.
In one embodiment, the terminal 102 installs a current battery pack, obtains a current working temperature corresponding to the current battery pack, determines a target cooling circulation mode from candidate cooling circulation modes according to the current working temperature, where the target cooling circulation mode includes a target control state corresponding to a current battery pack cooling control valve, obtains a current control state corresponding to the current battery pack cooling control valve, determines a current working state corresponding to the current battery pack cooling control valve according to the current control state and the target control state, and cools the current battery pack through a target cooling device in the target cooling circulation mode if the current working state corresponding to the current battery pack cooling control valve is a normal working state.
In one embodiment, as shown in fig. 2, a battery pack cooling control method is provided, which is described by taking the method as an example applied to the terminal or the server in fig. 1, and includes the following steps:
step 202, obtaining a current working temperature corresponding to the current battery pack.
The current battery pack refers to a battery pack currently in use, and the battery pack is an important component of the device and is used for providing electric energy to help the device to operate. For example, the core of an electric vehicle is a high-voltage power battery, which can be used as a current battery pack.
The battery pack is influenced by the ambient temperature and the internal resistance of the battery pack, so that the larger the internal resistance is, the larger the current output from the battery is, the more the battery pack generates heat, and the faster the temperature rises in the normal use process of the battery pack. When the battery pack is used for doing work externally with high power, the temperature of the battery pack can be increased more quickly if the ambient temperature is high, and therefore, the battery pack needs to be cooled quickly for safety.
The current working temperature refers to the temperature of a battery pack currently used by the current battery pack, a collection event of the temperature of the battery pack can be set, the collection event can be self-defined, the self-definition can be a setting timing event, the current working temperature corresponding to the current battery pack is obtained through the timing event, for example, a preset time interval is set, and when the preset time interval is reached, the current working temperature corresponding to the current battery pack can be obtained.
The self-defining of the collection event of the temperature of the battery pack can also be that the current working temperature corresponding to the current pack is obtained according to a request, when the temperature of the battery pack needs to be obtained, the request can be sent to a system for detecting the temperature of the battery pack, and once the system receives the request, the current working temperature corresponding to the current battery pack is returned according to the request.
And 204, determining a target cooling circulation mode from the candidate cooling circulation modes according to the current working temperature, wherein the target cooling circulation mode comprises a target control state corresponding to the current battery pack cooling control valve.
The candidate cooling circulation modes are candidate modes for cooling the battery pack, each candidate cooling circulation mode corresponds to different cooling devices, the battery pack can be cooled through the cooling devices, and the different candidate cooling circulation modes can be switched and controlled through the battery pack cooling control valve.
The battery pack cooling control valve is a valve used for controlling each candidate cooling circulation mode to cool the battery pack, different control states of the battery pack cooling control valve correspond to different candidate cooling circulation modes, for example, when the control state of the battery pack cooling control valve is closed, the battery pack can be cooled by the cooling device in the first cooling circulation mode, and when the control state of the battery pack cooling control valve is disconnected, the battery pack can be cooled by the cooling device in the second cooling circulation mode.
In one embodiment, as shown in fig. 2A, fig. 2A shows a schematic structural diagram of a candidate cooling cycle manner in an embodiment, a high-voltage battery pack in fig. 2A may be used as a current battery pack, if a control state of a cooling control valve of the current battery pack is closed, a first cooling cycle manner is composed of an external cooling cycle water pump, an external cooling cycle temperature sensor, an internal cooling cycle water pump, and an internal cooling cycle temperature sensor, and if the control state of the cooling control valve of the current battery pack is off, a second cooling cycle manner is composed of an internal cooling cycle water pump and an internal cooling cycle temperature sensor, where a cooling device in the second cooling cycle manner may be an air conditioner compressor, an air conditioner cooling on valve, and the like in fig. 2A.
Specifically, after the current working temperature corresponding to the current battery pack is obtained, the target cooling circulation mode may be determined from the candidate cooling circulation modes according to the current working temperature corresponding to the current battery pack, specifically, the candidate cooling circulation modes all have corresponding preset battery pack working temperatures, the target cooling circulation mode is determined according to the current working temperature of the current battery pack and the preset battery pack working temperatures, and for example, if the current working temperature is greater than the preset battery pack working temperature, the first cooling circulation mode in the candidate cooling circulation modes is used as the target cooling circulation mode.
If the first cooling circulation mode can be used as a target cooling circulation mode, cooling the current battery pack through first cooling equipment in the first cooling circulation mode, obtaining the working temperature of the cooled battery pack corresponding to the cooled current battery pack, and if the working temperature of the cooled battery pack is greater than a second preset battery pack working temperature threshold value, switching the target cooling circulation mode from the first cooling circulation mode to the second cooling circulation mode.
The control states of the battery pack cooling control valves corresponding to different candidate cooling circulation modes are different, and cooling can be performed through the corresponding cooling circulation mode only if the control state of the battery pack cooling control valve is correct, so that the correct state of the battery pack cooling control valve is used as the target control state corresponding to the battery pack cooling control valve.
For example, the candidate cooling cycle modes include a first cooling cycle mode and a second cooling cycle mode, the control state of the battery pack cooling control valve corresponding to the first cooling cycle mode is closed, the control state of the battery pack cooling control valve corresponding to the second cooling cycle mode is open, cooling can be performed by the first cooling cycle mode when the control state of the battery pack cooling control valve is closed, and similarly, cooling can be performed by the second cooling cycle mode when the control state of the battery pack cooling control valve is open.
And step 206, acquiring a current control state corresponding to the current battery pack cooling control valve.
The current control state refers to a control state in which the current battery pack cooling control valve is currently located, and the current battery pack cooling control valve can be controlled according to a target control state corresponding to the current battery pack cooling control valve in a target cooling circulation mode, or the current battery pack cooling control valve fails and is not controlled according to the target control state corresponding to the current battery pack cooling control valve in the target cooling circulation mode, so that the current control state corresponding to the current battery pack cooling control valve can be obtained, and whether the current battery pack cooling control valve is abnormal or not can be detected according to the current control state corresponding to the current battery pack cooling control valve and the target control state.
And 208, determining the current working state corresponding to the current battery pack cooling control valve according to the current control state and the target control state.
The current battery pack cooling control valve can be controlled according to a target control state corresponding to the current battery pack cooling control valve in a target cooling circulation mode, or the current battery pack cooling control valve fails and is not controlled according to the target control state corresponding to the current battery pack cooling control valve in the target cooling circulation mode, so that the current working state corresponding to the current battery pack cooling control valve can be determined according to the current control state and the target control state. And the current working state reflects whether the current control state of the current battery pack cooling control valve works according to the target control state corresponding to the current battery pack cooling control in the target cooling circulation mode.
And if the current control state of the current battery pack cooling control valve works according to the target control state corresponding to the current battery pack cooling control in the target cooling circulation mode, determining that the current working state corresponding to the current battery pack cooling control valve is a normal working state. Otherwise, if the current control state of the current battery pack cooling control valve does not work according to the target control state corresponding to the current battery pack cooling control in the target cooling circulation mode, determining that the current working state corresponding to the current battery pack cooling control valve is an abnormal working state. Therefore, in order to ensure that the abnormality of the battery pack cooling control valve causes a problem in the use of the battery pack and increases the power consumption of the equipment in which the battery pack is installed, it is necessary to monitor the operating state of the battery pack cooling control valve in real time to achieve the optimal cooling effect of the battery pack.
And step 210, if the current working state corresponding to the current battery pack cooling control valve is the normal working state, cooling the current battery pack through the target cooling equipment in the target cooling circulation mode.
If the current state corresponding to the current battery pack cooling control valve is the normal working state, the current control state of the current battery pack cooling control valve is described to work according to the target control state corresponding to the current battery pack cooling control in the target cooling circulation mode, and therefore the current target cooling circulation mode is described to be the best cooling mode of the current battery pack, namely, the current battery pack is cooled through the target cooling circulation mode, the best effect can be achieved, and therefore the current battery pack can be cooled through the target cooling equipment in the target cooling circulation mode.
If the current control state corresponding to the current battery pack cooling control valve is matched with the target control state corresponding to the current battery pack cooling control valve in the target cooling circulation mode, the current state corresponding to the current battery pack cooling control valve can be determined to be a normal working state.
In the battery pack cooling control method, the current working temperature corresponding to the current battery pack is obtained; determining a target cooling circulation mode from the candidate cooling circulation modes according to the current working temperature, wherein the target cooling circulation mode comprises a target control state corresponding to the current battery pack cooling control valve; acquiring a current control state corresponding to a current battery pack cooling control valve; determining a current working state corresponding to the current battery pack cooling control valve according to the current control state and the target control state; and if the current working state corresponding to the current battery pack cooling control valve is the normal working state, cooling the current battery pack through the target cooling equipment in the target cooling circulation mode.
Therefore, the target cooling circulation mode can be determined from the candidate cooling circulation modes in a self-adaptive mode according to the current working temperature of the current battery pack for cooling, whether the current battery pack cooling control valve is correct or not is judged by judging the target control state and the current control state of the current battery pack cooling control valve in the target cooling circulation mode, if the current battery pack cooling control valve is correct, the target cooling equipment in the target cooling circulation mode is used for cooling, otherwise, the target cooling circulation mode is replaced from the candidate cooling circulation mode, the cooling circulation mode is switched through the battery pack cooling control valve, and the cooling circulation mode is selected in a self-adaptive mode for cooling, so that the best cooling effect is achieved.
In one embodiment, the battery pack cooling control method further comprises the step of sending current work abnormity information corresponding to the current battery pack if the current work state corresponding to the current battery pack cooling control valve is an abnormal work state, wherein the current work abnormity information is used for reminding the current battery pack of abnormal cooling.
If the current state corresponding to the current battery pack cooling control valve is an abnormal working state, the current control state of the current battery pack cooling control valve is described as not working according to the target control state corresponding to the current battery pack cooling control in the target cooling circulation mode, and the current battery pack cooling control valve is described as abnormal.
Further, if the current battery pack cooling control valve corresponding to the current battery pack is abnormal, the current work abnormality information corresponding to the current battery pack needs to be notified to a person using the equipment installed with the current battery pack to notify the person that the current battery pack is abnormal in cooling, wherein the current work abnormality information is used for reminding the current battery pack of abnormal cooling.
In one embodiment, as shown in fig. 3, the step of detecting that the current operating state corresponding to the current battery pack cooling control valve is an abnormal operating state includes:
and 302, acquiring a circuit structure corresponding to the current battery pack cooling control valve, wherein the circuit structure comprises a cooling control valve control loop and a control circuit.
And 304, when the control loop of the cooling control valve is short-circuited to the positive pole of the control circuit, determining that the current working state corresponding to the cooling control valve of the current battery pack is an abnormal working state.
The control state of the current battery pack cooling control valve is controlled through a related circuit, so that whether abnormality occurs or not can be monitored through a circuit structure corresponding to the current battery pack cooling control valve, specifically, the circuit structure corresponding to the current battery pack cooling control valve is obtained and comprises a cooling control valve control loop and a control circuit, the cooling control valve control loop is connected with the control circuit, the control state of the battery pack cooling control valve is directly driven through the control circuit, the cooling control valve control loop feeds an analog signal back to the control loop, and the control loop drives the control state of the battery pack cooling control valve according to the analog signal. Therefore, it is possible to detect whether the current operating state corresponding to the current battery pack cooling control valve is an abnormal operating state or not, based on the relationship between the cooling control valve control circuit and the control circuit.
Specifically, the step of detecting whether the current working state corresponding to the current battery pack cooling control valve is the abnormal working state according to the relationship between the cooling control valve control loop and the control circuit may be that the cooling control valve control loop is connected in parallel with a resistor RPR in the condition of the cooling control valve control loop being openPIn series with the drive coil of the battery pack cooling control valve.
Wherein, when the battery pack cooling control valve receives the disconnection request, the state of the cooling control valve control loop is normalThen, the drive coil is controlled to pass through a pull-up resistor RPIs connected to the positive pole of the control circuit, due to the resistor RPIs much larger than the resistance of the driving coil, so that the value of the output voltage is close to 0; when the cooling control valve control loop is in short circuit with the positive pole of the control circuit, the control driving coil is directly connected to the positive pole of the control circuit, and the value of the output voltage is equal to the voltage of the positive pole of the control circuit, which shows that the value of the output voltage is equal to the voltage of the positive pole of the control circuit only when the current working state of the current battery pack cooling control valve is abnormal. Therefore, when the cooling control valve control loop is short-circuited to the positive pole of the control circuit, the current working state corresponding to the current battery pack cooling control valve is determined to be an abnormal working state.
When the battery pack cooling control valve receives a closing request, under the condition that the state of a cooling control valve control loop is normal, control current flows through a driving coil through the cooling control valve control loop, and the cooling control valve control loop can feed back the state of voltage detection current; when the cooling control valve control loop is in short circuit with the positive electrode of the control circuit, current is connected through the short circuit and flows through the driving coil in a direct current mode, the current value detected by the cooling control valve control loop is 0, and similarly, the current value detected by the cooling control valve control loop is also 0 under the open circuit condition, which indicates that the current working state of the battery pack cooling control valve is abnormal, and the current value detected by the cooling control valve control loop is 0.
And step 306, when the cooling control valve control loop is open, determining that the current working state corresponding to the current battery pack cooling control valve is an abnormal working state.
Similarly, when the battery pack cooling control valve receives a disconnection request, the control drive coil passes through the pull-up resistor R under the condition that the state of the cooling control valve control loop is normalPIs connected to the positive pole of the control circuit, due to the resistor RPIs much larger than the resistance of the driving coil, so that the value of the output voltage is close to 0; when the cooling control valve control loop is open, the control drive coil will be connected directly to the control circuit, as is the case when the cooling control valve control loop is shorted to the control circuit anodeAnd when the output voltage value is equal to the positive voltage of the control circuit, the output voltage value is equal to the positive voltage of the control circuit only when the current working state of the current battery pack cooling control valve is abnormal. Therefore, when the cooling control valve control loop is short-circuited to the positive pole of the control circuit, the current working state corresponding to the current battery pack cooling control valve is determined to be an abnormal working state.
It should be noted that, the sum or relationship between step 302, step 304 and step 306 may be detected by the method of step 302 and step 304, or by the method of step 306, or by both methods.
In one embodiment, as shown in fig. 4, the step of detecting that the current operating state corresponding to the current battery pack cooling control valve is an abnormal operating state includes:
and 402, when the cooling control valve control loop is short-circuited to the ground, determining that the current working state corresponding to the current battery pack cooling control valve is an abnormal working state.
When the battery pack cooling control valve receives a closing request, under the condition that the state of a cooling control valve control loop is normal, the current for driving the cooling control valve control loop is connected to a power ground through a control driving coil, and the driving coil keeps the driving current value within a certain range due to the action of a magnetic field; when the cooling control valve controls the gourd to be in short circuit with the ground, the driving current is directly connected to the power ground, and the driving current value is far larger than a normal value, which indicates that the current working state of the current battery pack cooling control valve is abnormal, so that the current of the cooling control valve control loop is far larger than the normal value.
When the battery pack cooling control valve receives a disconnection request, the short-circuit to ground state of the cooling control valve control loop cannot be judged, but the normal state output of the cooling control valve is not influenced by the short-circuit to ground state of the cooling control valve control loop, so that the judgment is not made here. Therefore, when the cooling control valve control circuit is short-circuited to the ground, the current working state corresponding to the current battery pack cooling control valve is determined to be the abnormal working state.
Step 404, detecting whether the current battery pack cooling control valve is locked at a target mechanical position due to mechanical faults, wherein the target mechanical position is a closing mechanical position or an opening mechanical position.
And 406, when the current battery pack cooling control valve is detected to be locked at the target mechanical position due to mechanical faults, determining that the current working state corresponding to the current battery pack cooling control valve is an abnormal working state.
The target mechanical position may be one of a closed mechanical position and an open mechanical position, and since the current battery pack cooling control valve may be locked at a certain mechanical position due to a mechanical fault, the first cooling circulation manner and the second cooling circulation manner in the later candidate cooling circulation manners cannot be decoupled, and after a certain event, there is no way to generate a temperature deviation, it may be determined by detecting whether the current battery pack cooling control valve is locked at the target mechanical position due to the mechanical fault, and the determination of the target mechanical position may be determined according to a service requirement and an actual scene, and specifically may be the closed mechanical position or the open mechanical position.
Further, when the current battery pack cooling control valve is detected to be locked at the target mechanical position due to mechanical faults, the current battery pack cooling control valve is indicated to be abnormal, and the current battery pack cooling control valve cannot be locked at the target mechanical position.
It should be noted that, the sum or relationship between step 402 and step 404 and step 406 may be detected by the method of step 402, or detected by the methods of step 404 and step 406, or detected by both methods.
In one embodiment, as shown in fig. 5, when it is detected that the current battery pack cooling control valve is locked at the target mechanical position due to a mechanical failure, the method includes:
step 502, obtaining a current running speed, wherein the current running speed is a current running speed corresponding to a current device provided with a current battery pack.
In step 504, a first coolant temperature corresponding to the first cooling cycle is obtained.
In step 506, a second coolant temperature corresponding to the second cooling circulation mode is obtained.
Here, the current running speed is a speed at which the current equipment mounted with the current battery pack is currently running, and since the coolant temperature of the candidate cooling circulation pattern is related to the running speed, the running speed needs to be taken into consideration when considering whether or not the current battery pack cooling control valve is locked at the target machine position due to a mechanical failure.
And obtaining the first cooling liquid temperature corresponding to the first cooling circulation mode and the second cooling liquid temperature corresponding to the second cooling circulation mode.
In step 508, a first coolant temperature difference is calculated according to the current driving speed, the first coolant temperature and the second coolant temperature.
In step 510, it is determined that the current battery pack cooling control valve is locked at the target mechanical position due to a mechanical failure when the first coolant temperature difference is greater than a first preset coolant temperature difference.
Specifically, after the current running speed, the first cooling liquid temperature and the second cooling liquid temperature are obtained, the first cooling liquid temperature difference can be calculated according to the current running speed, the first cooling liquid temperature and the second cooling liquid temperature, wherein the temperature difference between the first cooling circulation mode and the second cooling circulation mode can be reflected by the first cooling liquid temperature difference, and whether the current battery pack cooling control valve is locked at the target mechanical position due to a mechanical fault or not is judged through the temperature difference.
The calculation method for calculating the first coolant temperature difference according to the current driving speed, the first coolant temperature and the second coolant temperature can be customized, the customization can be to calculate the average value of the current driving speed, the first coolant temperature and the second coolant temperature and take the calculation result as the first coolant temperature difference, or the customization can also be to obtain a preset algorithm, calculate the current driving speed, the first coolant temperature and the second coolant temperature through the preset algorithm to obtain a result, and take the calculation result as the first coolant temperature difference.
Further, after the first coolant temperature difference is obtained, it may be determined whether the current battery pack cooling control valve is locked at the target mechanical position due to a mechanical fault through the first coolant temperature difference, specifically, a first preset coolant temperature difference is obtained, where the first preset coolant temperature difference is used to determine whether a deviation occurs in temperature values of the first cooling circulation manner and the second cooling circulation manner, and when the first coolant temperature difference is greater than the first preset coolant temperature difference, it is determined that the deviation does not occur in the temperature values of the first cooling circulation manner and the second cooling circulation manner, and therefore the temperature of the first cooling circulation manner and the temperature of the second cooling circulation manner cannot be decoupled, and therefore, it may be determined that the current battery pack cooling control valve is locked at the target mechanical position due to a mechanical fault.
For example, if the current battery pack cooling control valve is in the closed mechanical position, this indicates that the current battery pack is being cooled by the first cooling cycle mode. If the temperature of the current battery pack continues to rise, and when the battery pack needs to be cooled independently by the second cooling circulation mode, if the current battery pack cooling control valve works normally, the temperature of the two cooling circulation modes is decoupled because the cooling intensity of the first cooling circulation mode and the second cooling circulation mode is high, and the temperature of the first cooling circulation mode and the temperature of the second cooling circulation mode gradually deviate.
If the current battery pack cooling control valve breaks down and is locked at the closed mechanical position, the temperatures of the first cooling circulation mode and the second cooling circulation mode cannot be decoupled, if the temperature values of the two cooling circulation modes do not generate deviation within a period of time, and the temperatures of the cooling liquids of the first cooling circulation mode and the second cooling circulation mode are higher than a certain threshold value, the current battery pack cooling control valve is judged to be locked at the closed mechanical position.
In one embodiment, as shown in fig. 6, when it is detected that the current battery pack cooling control valve is locked at the target mechanical position due to a mechanical failure, the method includes:
step 602, a first coolant temperature corresponding to a first cooling circulation manner is obtained.
In step 604, a second coolant temperature corresponding to the second cooling cycle is obtained.
In step 606, a second coolant temperature difference is calculated based on the first coolant temperature and the second coolant temperature.
And obtaining the first cooling liquid temperature corresponding to the first cooling circulation mode and the second cooling liquid temperature corresponding to the second cooling circulation mode.
Specifically, after the first coolant temperature and the second coolant temperature are obtained, the second cooling temperature difference may be calculated according to the first coolant temperature and the second coolant temperature, and it is only necessary to consider the coolant temperatures of the first cooling circulation manner and the second cooling circulation manner, that is, it is determined whether the current battery pack cooling control valve is locked at the target mechanical position due to the mechanical failure by the coolant temperatures of the first cooling circulation manner and the second cooling circulation manner.
The calculation method for calculating the second cooling temperature difference according to the first cooling liquid temperature and the second cooling liquid temperature may be customized, where the customization may be to perform an average calculation according to the first cooling liquid temperature and the second cooling liquid temperature and use the calculation result as the second cooling liquid temperature difference, or the customization may be to perform weighted summation on the first cooling liquid temperature and the second cooling liquid temperature and use the calculation result of the weighted summation as the second cooling liquid temperature, and so on.
In step 608, when the second coolant temperature difference is greater than the second preset coolant temperature difference, a first current count value corresponding to the first counter is obtained through recording by the first counter.
In step 610, when the second coolant temperature difference is smaller than the second preset coolant temperature difference, a second current count value corresponding to the second counter is obtained through recording of the second counter.
Step 612, calculating to obtain a current total count value according to the first current count value and the second current count value.
In order to avoid temperature impact when the first cooling circulation mode and the second cooling circulation mode are coupled, filtering is performed on a temperature difference value between the first cooling circulation mode and the second cooling circulation mode, and meanwhile, in order to prevent heat accumulation of other components from influencing current battery pack cooling, counting can be performed through a counter, and when the counter reaches a preset condition, it is determined that the current battery pack cooling control valve is locked at a target mechanical position due to mechanical failure.
Specifically, a second preset coolant temperature difference is obtained, where the second preset coolant temperature difference is used to determine whether the temperature values of the first cooling circulation manner and the second cooling circulation manner deviate, when the second coolant temperature difference is greater than the second preset coolant temperature difference, the number of times can be recorded by a first counter, so as to obtain a first current count value corresponding to the first counter, where the first counter is used to record the number of times that the second coolant temperature difference is greater than the second preset coolant temperature difference.
On the contrary, if the second coolant temperature difference is smaller than the second preset coolant temperature difference, the second current count value corresponding to the second counter may be obtained by recording the number of times by the second counter, where the second counter is used to record the number of times that the second coolant temperature difference is smaller than the second preset coolant temperature difference.
Further, the current total count value may be obtained by calculating according to the first current count value and the second current count value, where the calculation manner of calculating the current total count value may be to count the first current count value and the second current count value, use a result of the counting as the current total count value, for example, perform comprehensive summation on the first current count value and the second current count value, and use a result of the summation as the current total count value.
In step 614, if the current total count value is greater than the threshold of the preset count value, the current count ratio is calculated according to the first current count value and the current total count value.
In step 616, if the current count ratio is greater than the preset count ratio, it is determined that the current battery pack cooling control valve is locked at the target mechanical position due to a mechanical fault.
Specifically, after the current total count value is obtained, if the current total count value reaches a certain number, the current count ratio needs to be calculated according to the first current count value and the current total count value. Specifically, a preset count value threshold is obtained, and the preset count value threshold is used for judging the counting of the counter; if the accumulated number of times reaches the threshold, if the current total count value is greater than the preset count value threshold, it indicates that the total counts accumulated in the first counter and the second counter reach the count threshold, and therefore, the current count ratio can be calculated according to the first current count value and the current total count value, where the current count ratio can be calculated in a manner that the ratio of the first current count value and the current total count value is taken as the current count ratio.
Further, after the current counting ratio is obtained, whether the current battery pack cooling control valve is locked at the target mechanical position due to mechanical faults can be judged through the current counting ratio, specifically, a preset counting ratio is obtained and used for judging whether the current counting ratio is normal, and if the current counting ratio is larger than the preset counting ratio, the current counting ratio is abnormal, and the current battery pack cooling control valve is determined to be locked at the target mechanical position due to mechanical faults.
In one embodiment, as shown in fig. 7, determining a target cooling cycle style from the candidate cooling cycle styles according to the current operating temperature includes:
step 702, obtaining a first preset battery pack working temperature threshold and a second preset battery pack working temperature threshold, wherein the first preset battery pack working temperature threshold is smaller than the second preset battery pack working temperature threshold.
Step 704, if the current working temperature is greater than the first preset battery pack working temperature threshold, the first cooling circulation mode is taken as the target cooling circulation mode from the candidate cooling circulation modes.
The first preset battery pack working temperature threshold is a standard corresponding to the first cooling circulation mode, and whether the first cooling circulation mode is determined to be the target cooling circulation mode or not can be determined according to the current battery pack working temperature and the first preset battery pack working temperature threshold. Specifically, if the current working temperature of the current battery pack is greater than a first preset battery pack working temperature threshold, the first cooling circulation mode is determined as the target cooling circulation mode.
The second preset battery pack operating threshold is used for judging whether the current operating temperature of the current battery pack continues to rise after the battery pack is cooled by using the first cooling circulation mode, so that whether the second cooling circulation mode is switched to be the target cooling circulation mode can be determined by using the temperature after the battery pack is cooled by using the first cooling circulation mode and the second preset battery pack operating temperature threshold.
And step 706, when the target cooling circulation mode is the first cooling circulation mode, cooling the current battery pack through the first cooling device in the first cooling circulation mode, and obtaining the working temperature of the cooled battery pack corresponding to the cooled current battery pack.
Step 708, if the working temperature of the cooling battery pack is greater than a second preset battery pack working temperature threshold, switching the target cooling circulation mode from the first cooling circulation mode to a second cooling circulation mode, where the candidate cooling circulation modes include the first cooling circulation mode and the second cooling circulation mode.
When the target cooling circulation mode is the first cooling circulation mode, cooling the current battery pack through first cooling equipment in the first cooling circulation mode to obtain the working temperature of the cooled battery pack after the current battery pack is cooled.
However, since the first cooling cycle may not achieve the optimal cooling effect, the current operating temperature of the battery pack continues to rise, and therefore, the cooling cycle needs to be replaced to cool the current battery pack, otherwise, a safety problem may occur. Specifically, when the target cooling circulation mode is the first cooling circulation mode, the current battery pack is cooled by the first cooling device in the first cooling circulation mode, the working temperature of the cooled battery pack corresponding to the cooled current battery pack is obtained, the working temperature threshold of the second preset battery pack is obtained, and whether the temperature of the current battery pack is continuously increased or not is judged according to the working temperature threshold of the second preset battery pack and the working temperature of the cooled battery pack corresponding to the cooled current battery pack.
Further, if the working temperature of the cooling battery pack is greater than the second preset battery pack working temperature threshold, it is indicated that the first cooling circulation mode cannot achieve the optimal cooling effect, and therefore the target cooling circulation mode needs to be replaced, the target cooling circulation mode is switched from the first cooling circulation mode to the second cooling circulation mode, and the current battery pack is cooled by the second cooling device of the second cooling circulation mode.
In one embodiment, the step of detecting that the current working state corresponding to the current battery pack cooling control valve is the normal working state includes: and if the current control state is matched with the target control state, determining that the current working state corresponding to the current battery pack cooling control valve is a normal working state.
Specifically, it is determined whether the current working state corresponding to the current battery pack cooling control valve is a normal working state, and specifically, if the current control state of the current battery pack cooling control valve is the same as the target control state corresponding to the current battery pack cooling control valve in the target cooling circulation mode, it is determined that the current battery pack cooling control valve is controlled according to the target control state corresponding to the current battery pack cooling control valve in the target cooling circulation mode, so that it can be determined that the current working state corresponding to the current battery pack cooling control valve is a normal working state.
In a specific embodiment, a method for controlling cooling of a battery pack is provided, which specifically includes the following steps:
1. and acquiring the current working temperature corresponding to the current battery pack.
2. And determining a target cooling circulation mode from the candidate cooling circulation modes according to the current working temperature, wherein the target cooling circulation mode comprises a target control state corresponding to the current battery pack cooling control valve.
And 2-1, acquiring a first preset battery pack working temperature threshold and a second preset battery pack working temperature threshold, wherein the first preset battery pack working temperature threshold is smaller than the second preset battery pack working temperature threshold.
And 2-2, if the current working temperature is greater than a first preset battery pack working temperature threshold value, taking the first cooling circulation mode as a target cooling circulation mode from the candidate cooling circulation modes.
And 2-3, when the target cooling circulation mode is the first cooling circulation mode, cooling the current battery pack through first cooling equipment in the first cooling circulation mode, and obtaining the working temperature of the cooled battery pack corresponding to the cooled current battery pack.
And 2-4, if the working temperature of the cooling battery pack is greater than a second preset battery pack working temperature threshold value, switching the target cooling circulation mode from the first cooling circulation mode to a second cooling circulation mode, wherein the candidate cooling circulation modes comprise the first cooling circulation mode and the second cooling circulation mode.
3. And acquiring the current control state corresponding to the current battery pack cooling control valve.
4. And determining the current working state corresponding to the current battery pack cooling control valve according to the current control state and the target control state.
5. And if the current working state corresponding to the current battery pack cooling control valve is the normal working state, cooling the current battery pack through the target cooling equipment in the target cooling circulation mode.
And 5-1, if the current control state is matched with the target control state, determining that the current working state corresponding to the current battery pack cooling control valve is a normal working state.
6. And if the current working state corresponding to the current battery pack cooling control valve is an abnormal working state, sending current working abnormal information corresponding to the current battery pack, wherein the current working abnormal information is used for reminding the current battery pack of abnormal cooling.
And 6-1, acquiring a circuit structure corresponding to the current battery pack cooling control valve, wherein the circuit structure comprises a cooling control valve control loop and a control circuit.
6-2, when the control loop of the cooling control valve is short-circuited to the positive pole of the control circuit, determining that the current working state corresponding to the current battery pack cooling control valve is an abnormal working state, and/or determining that the current working state is an abnormal working state.
And 6-3, when the control loop of the cooling control valve is open, determining that the current working state corresponding to the current battery pack cooling control valve is an abnormal working state.
And 6-4, when the cooling control valve control loop is short-circuited to the ground, determining that the current working state corresponding to the current battery pack cooling control valve is an abnormal working state, and/or determining that the current working state corresponds to the current battery pack cooling control valve.
And 6-5, detecting whether the current battery pack cooling control valve is locked at a target mechanical position due to mechanical faults, wherein the target mechanical position is a closed mechanical position or an open mechanical position, and when detecting that the current battery pack cooling control valve is locked at the target mechanical position due to the mechanical faults, determining that the current working state corresponding to the current battery pack cooling control valve is an abnormal working state.
6-5-1-1, obtaining the current running speed, wherein the current running speed is the current running speed corresponding to the current equipment provided with the current battery pack.
6-5-1-2, obtaining the first cooling liquid temperature corresponding to the first cooling circulation mode.
6-5-1-3, and obtaining the temperature of the second cooling liquid corresponding to the second cooling circulation mode.
6-5-1-4, and calculating to obtain a first cooling liquid temperature difference according to the current running speed, the first cooling liquid temperature and the second cooling liquid temperature.
6-5-1-5, when the first coolant temperature difference is larger than the first preset coolant temperature difference, determining that the current battery pack cooling control valve is locked at the target mechanical position due to mechanical faults.
6-5-2-1, obtaining the temperature of the first cooling liquid corresponding to the first cooling circulation mode.
6-5-2-2, and obtaining the temperature of the second cooling liquid corresponding to the second cooling circulation mode.
6-5-2-3, and calculating to obtain a second cooling liquid temperature difference according to the first cooling liquid temperature and the second cooling liquid temperature.
6-5-2-4, when the second cooling liquid temperature difference is larger than the second preset cooling liquid temperature difference, recording through the first counter, and obtaining a first current count value corresponding to the first counter.
And 6-5-2-5, when the second cooling liquid temperature difference is smaller than a second preset cooling liquid temperature difference, recording through a second counter to obtain a second current count value corresponding to the second counter.
6-5-2-6, and calculating to obtain the current total count value according to the first current count value and the second current count value.
6-5-2-7, if the current total counting value is larger than the threshold value of the preset counting value, calculating the current counting ratio according to the first current counting value and the current total counting value.
6-5-2-8, and if the current count ratio is larger than the preset count ratio, determining that the current battery pack cooling control valve is locked at the target mechanical position due to mechanical failure.
It should be understood that, although the steps in the above-described flowcharts are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a portion of the steps in the above-described flowcharts may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of performing the sub-steps or the stages is not necessarily sequential, but may be performed alternately or alternatingly with other steps or at least a portion of the sub-steps or stages of other steps.
In one embodiment, as shown in fig. 8, there is provided a battery pack cooling control apparatus 800 including: a battery pack operating temperature acquisition module 802, a cooling cycle mode determination module 804, a cooling control valve control state determination module 806, a cooling control valve operating state determination module 808, and a battery pack cooling module 810, wherein:
a battery pack operating temperature obtaining module 802, configured to obtain a current operating temperature corresponding to a current battery pack.
A cooling cycle mode determining module 804, configured to determine a target cooling cycle mode from the candidate cooling cycle modes according to the current working temperature, where the target cooling cycle mode includes a target control state corresponding to the current battery pack cooling control valve.
And a cooling control valve control state determination module 806, configured to obtain a current control state corresponding to the current battery pack cooling control valve.
And a cooling control valve working state determining module 808, configured to determine a current working state corresponding to the current battery pack cooling control valve according to the current control state and the target control state.
And the battery pack cooling module 810 is configured to cool the current battery pack through the target cooling device in the target cooling circulation mode if the current working state corresponding to the current battery pack cooling control valve is the normal working state.
In one embodiment, the battery pack cooling control device 800 is further configured to send current abnormal operation information corresponding to the current battery pack if the current operation state corresponding to the current battery pack cooling control valve is an abnormal operation state, where the current abnormal operation information is used to remind the current battery pack of abnormal cooling.
In one embodiment, the battery pack cooling control apparatus 800 is further configured to obtain a circuit structure corresponding to the current battery pack cooling control valve, where the circuit structure includes a cooling control valve control loop and a control circuit, and when the cooling control valve control loop is short-circuited to the positive terminal of the control circuit, it is determined that the current working state corresponding to the current battery pack cooling control valve is an abnormal working state, and/or when the cooling control valve control loop is open-circuited, it is determined that the current working state corresponding to the current battery pack cooling control valve is an abnormal working state.
In one embodiment, the battery pack cooling control apparatus 800 is further configured to determine that the current operating state corresponding to the current battery pack cooling control valve is an abnormal operating state when the cooling control valve control loop is short-circuited to ground, and/or detect whether the current battery pack cooling control valve is locked at a target mechanical position due to a mechanical fault, where the target mechanical position is a closed mechanical position or an open mechanical position, and determine that the current operating state corresponding to the current battery pack cooling control valve is an abnormal operating state when the current battery pack cooling control valve is locked at the target mechanical position due to a mechanical fault.
In one embodiment, the battery pack cooling control apparatus 800 is further configured to obtain a current driving speed, where the current driving speed is a current driving speed corresponding to a current device in which the current battery pack is installed, obtain a first coolant temperature corresponding to the first cooling cycle, obtain a second coolant temperature corresponding to the second cooling cycle, calculate a first coolant temperature difference according to the current driving speed, the first coolant temperature and the second coolant temperature, and determine that the current battery pack cooling control valve is locked at the target mechanical position due to a mechanical failure when the first coolant temperature difference is greater than a first preset coolant temperature difference.
In one embodiment, the battery pack cooling control apparatus 800 is further configured to obtain a first coolant temperature corresponding to the first cooling cycle, obtain a second coolant temperature corresponding to the second cooling cycle, calculate a second coolant temperature difference according to the first coolant temperature and the second coolant temperature, obtain a first current count value corresponding to the first counter through recording of the first counter when the second coolant temperature difference is greater than a second preset coolant temperature difference, obtain a second current count value corresponding to the second counter through recording of the second counter when the second coolant temperature difference is less than the second preset coolant temperature difference, calculate a current total count value according to the first current count value and the second current count value, calculate a current count ratio according to the first current count value and the current total count value if the current total count value is greater than a preset count value threshold, and if the current counting ratio is larger than the preset counting ratio, determining that the current battery pack cooling control valve is locked at the target mechanical position due to mechanical faults.
In one embodiment, the battery pack cooling control device 800 is further configured to obtain a first preset battery pack operating temperature threshold and a second preset battery pack operating temperature threshold, where the first preset battery pack operating temperature threshold is smaller than the second preset battery pack operating temperature threshold, and if the current operating temperature is greater than the first preset battery pack operating temperature threshold, the first cooling circulation mode is taken as the target cooling circulation mode from the candidate cooling circulation modes.
In an embodiment, the battery pack cooling control apparatus 800 is further configured to, when the target cooling circulation manner is the first cooling circulation manner, cool the current battery pack through the first cooling device in the first cooling circulation manner, obtain the working temperature of the cooled battery pack corresponding to the cooled current battery pack, and switch the target cooling circulation manner from the first cooling circulation manner to the second cooling circulation manner if the working temperature of the cooled battery pack is greater than a second preset threshold of the working temperature of the battery pack, where the candidate cooling circulation manners include the first cooling circulation manner and the second cooling circulation manner.
In one embodiment, the battery pack cooling module 810 is further configured to determine that the current working state corresponding to the current battery pack cooling control valve is a normal working state if the current control state and the target control state are matched.
For specific limitations of the battery pack cooling control device, reference may be made to the above limitations of the battery pack cooling control method, which are not described herein again. The respective modules in the above-described battery pack cooling control apparatus may be entirely or partially implemented by software, hardware, and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as shown in fig. 9. The computer device includes a processor, a memory, a network interface, and a database connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the computer device is used to store candidate cooling cycle patterns. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a battery pack cooling control method.
In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as shown in fig. 10. The computer device includes a processor, a memory, a network interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a battery pack cooling control method. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.
Those skilled in the art will appreciate that the configurations shown in fig. 9 or 10 are merely block diagrams of some configurations relevant to the present disclosure, and do not constitute a limitation on the computing devices to which the present disclosure may be applied, and that a particular computing device may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the following steps when executing the computer program: acquiring the current working temperature corresponding to the current battery pack; determining a target cooling circulation mode from the candidate cooling circulation modes according to the current working temperature, wherein the target cooling circulation mode comprises a target control state corresponding to the current battery pack cooling control valve; acquiring a current control state corresponding to a current battery pack cooling control valve; determining a current working state corresponding to the current battery pack cooling control valve according to the current control state and the target control state; and if the current working state corresponding to the current battery pack cooling control valve is the normal working state, cooling the current battery pack through the target cooling equipment in the target cooling circulation mode.
In one embodiment, the processor, when executing the computer program, further performs the steps of: and if the current working state corresponding to the current battery pack cooling control valve is an abnormal working state, sending current working abnormal information corresponding to the current battery pack, wherein the current working abnormal information is used for reminding the current battery pack of abnormal cooling.
In one embodiment, the processor, when executing the computer program, further performs the steps of: obtaining a circuit structure corresponding to a current battery pack cooling control valve, wherein the circuit structure comprises a cooling control valve control loop and a control circuit; when the cooling control valve control loop is short-circuited to the positive electrode of the control circuit, determining that the current working state corresponding to the current battery pack cooling control valve is an abnormal working state and/or; and when the control loop of the cooling control valve is open, determining that the current working state corresponding to the current battery pack cooling control valve is an abnormal working state.
In one embodiment, the processor, when executing the computer program, further performs the steps of: when the cooling control valve control loop is short-circuited to the ground, determining that the current working state corresponding to the current battery pack cooling control valve is an abnormal working state, and/or; detecting whether a current battery pack cooling control valve is locked at a target mechanical position due to mechanical faults, wherein the target mechanical position is a closed mechanical position or an open mechanical position; and when the current battery pack cooling control valve is detected to be locked at the target mechanical position due to mechanical faults, determining that the current working state corresponding to the current battery pack cooling control valve is an abnormal working state.
In one embodiment, the processor, when executing the computer program, further performs the steps of: acquiring a current running speed, wherein the current running speed is the current running speed corresponding to the current equipment provided with the current battery pack; acquiring a first cooling liquid temperature corresponding to a first cooling circulation mode; acquiring second cooling liquid temperature corresponding to the second cooling circulation mode; calculating to obtain a first cooling liquid temperature difference according to the current running speed, the first cooling liquid and the second cooling liquid temperature; and when the first coolant temperature difference is larger than a first preset coolant temperature difference, determining that the current battery pack cooling control valve is locked at the target mechanical position due to mechanical faults.
In one embodiment, the processor, when executing the computer program, further performs the steps of: acquiring a first cooling liquid temperature corresponding to a first cooling circulation mode; acquiring second cooling liquid temperature corresponding to the second cooling circulation mode; calculating a second cooling liquid temperature difference according to the first cooling liquid temperature and the second cooling liquid temperature; when the second cooling liquid temperature difference is larger than a second preset cooling liquid temperature difference, recording through a first counter to obtain a first current count value corresponding to the first counter; when the second cooling liquid temperature difference is smaller than a second preset cooling liquid temperature difference, recording through a second counter to obtain a second current count value corresponding to the second counter; calculating to obtain a current total count value according to the first current count value and the second current count value; if the current total count value is larger than the preset count value threshold, calculating a current count ratio according to the first current count value and the current total count value; and if the current counting ratio is larger than the preset counting ratio, determining that the current battery pack cooling control valve is locked at the target mechanical position due to mechanical faults.
In one embodiment, the processor, when executing the computer program, further performs the steps of: acquiring a first preset battery pack working temperature threshold and a second preset battery pack working temperature threshold, wherein the first preset battery pack working temperature threshold is smaller than the second preset battery pack working temperature threshold; and if the current working temperature is greater than a first preset battery pack working temperature threshold value, taking the first cooling circulation mode as a target cooling circulation mode from the candidate cooling circulation modes.
In one embodiment, the processor, when executing the computer program, further performs the steps of: when the target cooling circulation mode is the first cooling circulation mode, cooling the current battery pack through first cooling equipment in the first cooling circulation mode, obtaining the working temperature of the cooled battery pack corresponding to the cooled current battery pack, and if the working temperature of the cooled battery pack is larger than a second preset battery pack working temperature threshold value, switching the target cooling circulation mode from the first cooling circulation mode to the second cooling circulation mode, wherein the candidate cooling circulation modes comprise the first cooling circulation mode and the second cooling circulation mode.
In one embodiment, the processor, when executing the computer program, further performs the steps of: and if the current control state is matched with the target control state, determining that the current working state corresponding to the current battery pack cooling control valve is a normal working state.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of: acquiring the current working temperature corresponding to the current battery pack; determining a target cooling circulation mode from the candidate cooling circulation modes according to the current working temperature, wherein the target cooling circulation mode comprises a target control state corresponding to the current battery pack cooling control valve; acquiring a current control state corresponding to a current battery pack cooling control valve; determining a current working state corresponding to the current battery pack cooling control valve according to the current control state and the target control state; and if the current working state corresponding to the current battery pack cooling control valve is the normal working state, cooling the current battery pack through the target cooling equipment in the target cooling circulation mode.
In one embodiment, the processor, when executing the computer program, further performs the steps of: and if the current working state corresponding to the current battery pack cooling control valve is an abnormal working state, sending current working abnormal information corresponding to the current battery pack, wherein the current working abnormal information is used for reminding the current battery pack of abnormal cooling.
In one embodiment, the processor, when executing the computer program, further performs the steps of: obtaining a circuit structure corresponding to a current battery pack cooling control valve, wherein the circuit structure comprises a cooling control valve control loop and a control circuit; when the cooling control valve control loop is short-circuited to the positive electrode of the control circuit, determining that the current working state corresponding to the current battery pack cooling control valve is an abnormal working state and/or; and when the control loop of the cooling control valve is open, determining that the current working state corresponding to the current battery pack cooling control valve is an abnormal working state.
In one embodiment, the processor, when executing the computer program, further performs the steps of: when the cooling control valve control loop is short-circuited to the ground, determining that the current working state corresponding to the current battery pack cooling control valve is an abnormal working state, and/or; detecting whether a current battery pack cooling control valve is locked at a target mechanical position due to mechanical faults, wherein the target mechanical position is a closed mechanical position or an open mechanical position; and when the current battery pack cooling control valve is detected to be locked at the target mechanical position due to mechanical faults, determining that the current working state corresponding to the current battery pack cooling control valve is an abnormal working state.
In one embodiment, the processor, when executing the computer program, further performs the steps of: acquiring a current running speed, wherein the current running speed is the current running speed corresponding to the current equipment provided with the current battery pack; acquiring a first cooling liquid temperature corresponding to a first cooling circulation mode; acquiring second cooling liquid temperature corresponding to the second cooling circulation mode; calculating to obtain a first cooling liquid temperature difference according to the current running speed, the first cooling liquid and the second cooling liquid temperature; and when the first coolant temperature difference is larger than a first preset coolant temperature difference, determining that the current battery pack cooling control valve is locked at the target mechanical position due to mechanical faults.
In one embodiment, the processor, when executing the computer program, further performs the steps of: acquiring a first cooling liquid temperature corresponding to a first cooling circulation mode; acquiring second cooling liquid temperature corresponding to the second cooling circulation mode; calculating a second cooling liquid temperature difference according to the first cooling liquid temperature and the second cooling liquid temperature; when the second cooling liquid temperature difference is larger than a second preset cooling liquid temperature difference, recording through a first counter to obtain a first current count value corresponding to the first counter; when the second cooling liquid temperature difference is smaller than a second preset cooling liquid temperature difference, recording through a second counter to obtain a second current count value corresponding to the second counter; calculating to obtain a current total count value according to the first current count value and the second current count value; if the current total count value is larger than the preset count value threshold, calculating a current count ratio according to the first current count value and the current total count value; and if the current counting ratio is larger than the preset counting ratio, determining that the current battery pack cooling control valve is locked at the target mechanical position due to mechanical faults.
In one embodiment, the processor, when executing the computer program, further performs the steps of: acquiring a first preset battery pack working temperature threshold and a second preset battery pack working temperature threshold, wherein the first preset battery pack working temperature threshold is smaller than the second preset battery pack working temperature threshold; and if the current working temperature is greater than a first preset battery pack working temperature threshold value, taking the first cooling circulation mode as a target cooling circulation mode from the candidate cooling circulation modes.
In one embodiment, the processor, when executing the computer program, further performs the steps of: when the target cooling circulation mode is the first cooling circulation mode, cooling the current battery pack through first cooling equipment in the first cooling circulation mode, obtaining the working temperature of the cooled battery pack corresponding to the cooled current battery pack, and if the working temperature of the cooled battery pack is larger than a second preset battery pack working temperature threshold value, switching the target cooling circulation mode from the first cooling circulation mode to the second cooling circulation mode, wherein the candidate cooling circulation modes comprise the first cooling circulation mode and the second cooling circulation mode.
In one embodiment, the processor, when executing the computer program, further performs the steps of: and if the current control state is matched with the target control state, determining that the current working state corresponding to the current battery pack cooling control valve is a normal working state.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A battery pack cooling control method, the method comprising:
acquiring the current working temperature corresponding to the current battery pack;
determining a target cooling circulation mode from candidate cooling circulation modes according to the current working temperature, wherein the target cooling circulation mode comprises a target control state corresponding to a current battery pack cooling control valve;
acquiring a current control state corresponding to the current battery pack cooling control valve;
determining a current working state corresponding to the current battery pack cooling control valve according to the current control state and the target control state;
and if the current working state corresponding to the current battery pack cooling control valve is the normal working state, cooling the current battery pack through target cooling equipment in the target cooling circulation mode.
2. The method of claim 1, further comprising:
and if the current working state corresponding to the current battery pack cooling control valve is an abnormal working state, sending current working abnormal information corresponding to the current battery pack, wherein the current working abnormal information is used for reminding the current battery pack of abnormal cooling.
3. The method according to claim 2, wherein the step of detecting that the current operating state corresponding to the current battery pack cooling control valve is an abnormal operating state comprises:
acquiring a circuit structure corresponding to the current battery pack cooling control valve, wherein the circuit structure comprises a cooling control valve control loop and a control circuit;
when the cooling control valve control loop is in short circuit with the positive electrode of the control circuit, determining that the current working state corresponding to the current battery pack cooling control valve is an abnormal working state, and/or;
and when the control loop of the cooling control valve is open, determining that the current working state corresponding to the current battery pack cooling control valve is an abnormal working state.
4. The method of claim 3, further comprising:
when the cooling control valve control loop is short-circuited to the ground, determining that the current working state corresponding to the current battery pack cooling control valve is an abnormal working state, and/or;
detecting whether the current battery pack cooling control valve is locked at a target mechanical position due to mechanical faults, wherein the target mechanical position is a closed mechanical position or an open mechanical position;
and when the current battery pack cooling control valve is detected to be locked at the target mechanical position due to mechanical faults, determining that the current working state corresponding to the current battery pack cooling control valve is an abnormal working state.
5. The method of claim 4, wherein the detecting that the current battery pack cooling control valve is locked at the target mechanical position due to a mechanical failure comprises:
acquiring a current running speed, wherein the current running speed is a current running speed corresponding to current equipment provided with the current battery pack;
acquiring a first cooling liquid temperature corresponding to a first cooling circulation mode;
acquiring second cooling liquid temperature corresponding to the second cooling circulation mode;
calculating to obtain a first cooling liquid temperature difference according to the current running speed, the first cooling liquid and the second cooling liquid temperature;
and when the first coolant temperature difference is larger than a first preset coolant temperature difference, determining that the current battery pack cooling control valve is locked at a target mechanical position due to mechanical faults.
6. The method of claim 4, wherein the detecting that the current battery pack cooling control valve is locked at the target mechanical position due to a mechanical failure comprises:
acquiring a first cooling liquid temperature corresponding to a first cooling circulation mode;
acquiring second cooling liquid temperature corresponding to the second cooling circulation mode;
calculating a second cooling liquid temperature difference according to the first cooling liquid temperature and the second cooling liquid temperature;
when the second cooling liquid temperature difference is larger than a second preset cooling liquid temperature difference, recording through a first counter to obtain a first current count value corresponding to the first counter;
when the second cooling liquid temperature difference is smaller than a second preset cooling liquid temperature difference, recording through a second counter to obtain a second current count value corresponding to the second counter;
calculating to obtain a current total count value according to the first current count value and the second current count value;
when the current total count value is larger than a preset count value threshold value, calculating a current count ratio according to the first current count value and the current total count value;
and if the current counting ratio is larger than the preset counting ratio, determining that the current battery pack cooling control valve is locked at the target mechanical position due to mechanical faults.
7. The method of claim 1, wherein determining a target cooling cycle style from the candidate cooling cycle styles based on the current operating temperature comprises:
acquiring a first preset battery pack working temperature threshold and a second preset battery pack working temperature threshold, wherein the first preset battery pack working temperature threshold is smaller than the second preset battery pack working temperature threshold;
if the current working temperature is larger than the first preset battery pack working temperature threshold, taking a first cooling circulation mode as a target cooling circulation mode from candidate cooling circulation modes;
preferably, the method further comprises:
when the target cooling circulation mode is a first cooling circulation mode, cooling the current battery pack through first cooling equipment in the first cooling circulation mode to obtain the working temperature of the cooled battery pack corresponding to the cooled current battery pack;
if the working temperature of the cooling battery pack is greater than the second preset battery pack working temperature threshold value, switching the target cooling circulation mode from the first cooling circulation mode to a second cooling circulation mode, wherein the candidate cooling circulation modes comprise a first cooling circulation mode and a second cooling circulation mode;
preferably, the step of detecting that the current working state corresponding to the current battery pack cooling control valve is the normal working state includes:
and if the current control state is matched with the target control state, determining that the current working state corresponding to the current battery pack cooling control valve is a normal working state.
8. A battery pack cooling control apparatus, comprising:
the battery pack working temperature acquisition module is used for acquiring the current working temperature corresponding to the current battery pack;
a cooling circulation mode determining module, configured to determine a target cooling circulation mode from candidate cooling circulation modes according to the current working temperature, where the target cooling circulation mode includes a target control state corresponding to a current battery pack cooling control valve;
the cooling control valve control state determining module is used for acquiring the current control state corresponding to the current battery pack cooling control valve;
the cooling control valve working state determining module is used for determining the current working state corresponding to the current battery pack cooling control valve according to the current control state and the target control state;
and the battery pack cooling module is used for cooling the current battery pack through the target cooling equipment in the target cooling circulation mode if the current working state corresponding to the current battery pack cooling control valve is a normal working state.
9. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the steps of the method of any of claims 1 to 7 are implemented when the computer program is executed by the processor.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 7.
CN202010139708.0A 2020-03-03 2020-03-03 Battery pack cooling control method and device, computer equipment and storage medium Active CN111326825B (en)

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