CN113829960B - Electric automobile control method and device, medium and electronic equipment - Google Patents
Electric automobile control method and device, medium and electronic equipment Download PDFInfo
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- CN113829960B CN113829960B CN202111044316.7A CN202111044316A CN113829960B CN 113829960 B CN113829960 B CN 113829960B CN 202111044316 A CN202111044316 A CN 202111044316A CN 113829960 B CN113829960 B CN 113829960B
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- cooling fluid
- power battery
- battery
- temperature
- cooling
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
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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
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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
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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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
- H01M10/65—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
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- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The embodiment of the application provides an electric automobile control method, an electric automobile control device, a medium and electronic equipment. The electric automobile control method comprises the following steps: when a control instruction for cooling the power battery is triggered, controlling the cooling fluid circulation system to cool the power battery; acquiring the temperature of the cooling fluid in the cooling fluid circulation system in real time; and if the temperature of the cooling fluid is greater than or equal to a cooling fluid temperature threshold value, controlling the cooling fluid circulation system to stop cooling the power battery. The technical scheme of the embodiment of the application can reduce the risk of thermal runaway of the power battery.
Description
Technical Field
The application relates to the technical field of control of electric automobiles, in particular to an electric automobile control method, an electric automobile control device, a medium and electronic equipment.
Background
Thermal runaway is a phenomenon that the temperature of a battery core of an electric automobile is abnormal at a certain position, and the battery cores are mutually heated in a closed battery pack, so that the temperature of a power battery is abnormally increased. The current thermal runaway of the power battery of the electric automobile mostly occurs in the standing process after quick charge and after driving. The heat management cooling mode mainly adopted in the industry at present can forcibly interrupt cooling only by high-voltage reduction, and can keep cooling liquid to be circulated all the time to cool the battery when thermal runaway is detected. However, forced interruption of cooling after high voltage down increases the probability of thermal runaway, and the cooling fluid is circulated all the time when thermal runaway occurs, and the cell of thermal runaway can lead to continuous rise of the cooling fluid temperature, which can aggravate the severity of thermal runaway under certain extreme conditions.
Therefore, there is a strong need in the art for a power cell control scheme that reduces the probability of thermal runaway occurrence as well as the extent of thermal runaway damage.
Disclosure of Invention
Embodiments of the present application provide an electric vehicle control method, apparatus, computer program product or computer program, computer readable medium, and electronic device, so that the risk of thermal runaway of the power battery can be reduced, at least to some extent.
Other features and advantages of the application will be apparent from the following detailed description, or may be learned by the practice of the application.
According to an aspect of the present application, there is provided an electric vehicle control method including a power battery and a cooling fluid circulation system for cooling the power battery, the method including: when a control instruction for cooling the power battery is triggered, controlling the cooling fluid circulation system to cool the power battery; acquiring the temperature of the cooling fluid in the cooling fluid circulation system in real time; and if the temperature of the cooling fluid is greater than or equal to a cooling fluid temperature threshold value, controlling the cooling fluid circulation system to stop cooling the power battery.
In one embodiment of the present application, based on the foregoing aspect, the control method further includes the steps of: detecting the thermal state of the power battery in real time; and when the thermal state is detected to be in a runaway state, triggering a control instruction for cooling the power battery.
In one embodiment of the present application, based on the foregoing aspect, the control method further includes the steps of: when a high-voltage power-down instruction for the power battery is received, acquiring the battery temperature of the power battery; executing a high-voltage power down instruction for the power battery when the battery temperature is less than the battery temperature threshold; and when the battery temperature is greater than or equal to a battery temperature threshold, stopping executing a high-voltage power-down instruction for the power battery, and triggering a control instruction for cooling the power battery.
In one embodiment of the present application, based on the foregoing aspect, the controlling the cooling fluid circulation system to perform the cooling treatment on the power battery may be implemented by: acquiring a predetermined cooling fluid flow rate for the cooling fluid circulation system; and controlling the cooling fluid in the cooling fluid circulation system to flow in the power battery according to the preset cooling fluid flow rate so as to cool down the power battery.
In one embodiment of the present application, based on the foregoing, the power cell includes at least one cell, and acquiring a predetermined cooling fluid flow rate for the cooling fluid circulation system includes the steps of: acquiring the cell temperature of each cell in the power battery; determining a target cell having the cell temperature greater than or equal to the battery temperature threshold; and determining the preset cooling fluid flow rate according to the number of the target battery cells, wherein the preset cooling fluid flow rate is positively correlated with the number of the target battery cells.
In one embodiment of the application, based on the foregoing, the obtaining a predetermined cooling fluid flow rate for the cooling fluid circulation system further comprises the steps of: acquiring the cell temperature of each cell in the power battery; summing the cell temperatures of all the cells in the power battery to obtain the total cell temperature; and determining the preset cooling fluid flow rate according to the total temperature of the battery cells, wherein the preset cooling fluid flow rate is positively related to the total temperature of the battery cells.
In one embodiment of the application, the cooling fluid temperature threshold is 130 ℃.
According to another aspect of the present application, there is provided an electric vehicle control apparatus including a power battery and a cooling fluid circulation system for cooling the power battery, the apparatus including: a first control unit for acquiring a battery temperature of the power battery when a high-voltage power-down instruction for the power battery is received; executing a high-voltage power-down instruction for the power battery when the battery temperature is less than a battery temperature threshold; when the battery temperature is greater than or equal to a battery temperature threshold, stopping executing a high-voltage power-down instruction for the power battery, and triggering a control instruction for cooling the power battery; when a control instruction for cooling the power battery is triggered, controlling the cooling fluid circulation system to cool the power battery; an acquisition unit for acquiring the cooling fluid temperature in the cooling fluid circulation system in real time; a second control unit for controlling the cooling fluid circulation system to stop the cooling process of the power battery if the cooling fluid temperature is greater than or equal to a cooling fluid temperature threshold; wherein, power battery includes at least one electric core, control cooling fluid circulation system carries out the cooling treatment to power battery, includes: acquiring the cell temperature of each cell in the power battery; determining a target cell having the cell temperature greater than or equal to the battery temperature threshold; determining the preset cooling fluid flow rate according to the number of the target battery cells, wherein the preset cooling fluid flow rate is positively correlated with the number of the target battery cells; and controlling the cooling fluid in the cooling fluid circulation system to flow in the power battery according to the preset cooling fluid flow rate so as to cool down the power battery.
According to another aspect of the present application, there is provided a computer-readable storage medium having stored therein at least one program code loaded and executed by a processor to implement operations performed by the electric vehicle control method.
According to another aspect of the present application, there is provided an electronic device comprising one or more processors and one or more memories, the one or more memories having stored therein at least one piece of program code that is loaded and executed by the one or more processors to implement operations performed by the electric vehicle control method.
Based on the scheme, the application has at least the following advantages or progressive effects:
in the application, during the cooling treatment of the power battery by the cooling fluid circulation system, the temperature of the cooling fluid in the cooling fluid circulation system is obtained in real time, and the cooling fluid circulation system is controlled to stop cooling treatment of the power battery when the temperature of the cooling fluid is greater than or equal to the threshold value of the temperature of the cooling fluid, so that the circulation of the cooling fluid is interrupted in time when the temperature of the cooling fluid is higher, and the reverse regulation of the temperature of the power battery caused by the continuous rising of the temperature of the cooling fluid is avoided, thereby reducing the risk of thermal runaway of the power battery.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. It is evident that the drawings in the following description are only some embodiments of the present application and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art. In the drawings:
FIG. 1 illustrates a flow diagram of an electric vehicle control method in one embodiment of the application;
FIG. 2 illustrates a flow diagram of an electric vehicle control method in one embodiment of the application;
FIG. 3 illustrates a flow diagram of an electric vehicle control method in one embodiment of the application;
FIG. 4 illustrates a flow diagram of an electric vehicle control method in one embodiment of the application;
fig. 5 shows a schematic diagram of an electric vehicle control device in one embodiment of the application.
Fig. 6 shows a schematic diagram of a computer system suitable for use in implementing an embodiment of the application.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the application may be practiced without one or more of the specific details, or with other methods, components, devices, steps, etc. In other instances, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the application.
The block diagrams depicted in the figures are merely functional entities and do not necessarily correspond to physically separate entities. That is, the functional entities may be implemented in software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.
The flow diagrams depicted in the figures are exemplary only, and do not necessarily include all of the elements and operations/steps, nor must they be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the order of actual execution may be changed according to actual situations.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the objects so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in other sequences than those illustrated or otherwise described.
Referring to fig. 1, fig. 1 shows a flow chart of a control method of an electric vehicle according to an embodiment of the present application, the electric vehicle including a power battery and a cooling fluid circulation system for cooling the power battery, the method including steps S1 to S3:
and step S1, when a control instruction for cooling the power battery is triggered, controlling the cooling fluid circulation system to cool the power battery.
And S2, acquiring the temperature of the cooling fluid in the cooling fluid circulation system in real time.
And step S3, if the temperature of the cooling fluid is greater than or equal to a cooling fluid temperature threshold value, controlling the cooling fluid circulation system to stop cooling the power battery.
In one embodiment of the application, a method of steps as shown in fig. 2 may also be performed.
Referring to fig. 2, a flow chart of an electric vehicle control method according to an embodiment of the present application is shown, that is, before a control command for performing a cooling process on the power battery is triggered, a method for determining whether to trigger may include steps S101 to S102:
step S101, detecting the thermal state of the power battery in real time.
And step S102, when the thermal state is detected to be in a runaway state, triggering a control instruction for cooling the power battery.
In the present application, the electric vehicle may cause abnormal heat generation of the power battery of the electric vehicle due to various reasons, such as collision, battery short circuit, or high-intensity driving. When the abnormal temperature of the power battery is detected, and the thermal state is in a runaway state, namely, when the battery is or is about to be in thermal runaway, a control instruction for cooling the power battery can be triggered, the power battery is cooled, the release of the power battery to a certain extent in the initial stage of the thermal runaway can be realized, and the driver and passenger safety can be effectively ensured.
And when judging that the temperature of the cooling fluid is greater than or equal to the temperature threshold value of the cooling fluid, controlling the cooling fluid circulation system to stop cooling the power battery, and timely interrupting circulation of the cooling fluid after thermal runaway occurs, so that reverse regulation of the temperature of the power battery caused by continuous up-going of the temperature of the cooling fluid is avoided, and further serious degree of thermal runaway of the power battery is avoided. In one embodiment of the application, a method of steps as shown in fig. 3 may also be performed.
Referring to fig. 3, a flow chart of an electric vehicle control method according to an embodiment of the present application, that is, a method for triggering a control instruction for performing cooling treatment on the power battery, and determining whether to trigger may further include steps S103 to S105:
step S103, when a high-voltage power-down instruction for the power battery is received, acquiring a battery temperature of the power battery.
And step S104, executing a high-voltage power-down instruction for the power battery when the battery temperature is smaller than the battery temperature threshold value.
And step 105, when the battery temperature is greater than or equal to a battery temperature threshold value, stopping executing a high-voltage power-down instruction for the power battery, and triggering a control instruction for cooling the power battery.
In the application, after the electric automobile finishes normal running, the whole automobile system can be closed usually after high-voltage power reduction. Under prior art, can control when the high pressure is down and close electric automobile power battery's cooling circulation system, the power battery that just finishes discharging at this moment still is in higher temperature, and the inside electric core of power battery can not normally dispel the heat under the high temperature condition, and the power battery electric core still can influence each other, finally leads to power battery temperature to rise continuously, increases the risk that takes place thermal runaway. After receiving a high-voltage down instruction aiming at the power battery, the application firstly detects the current temperature of the power battery and then judges whether to execute the high-voltage down instruction.
For example, after receiving a high-voltage power-down instruction, the current power battery temperature is acquired as a, and the set power battery temperature threshold is set as B, where the following two cases may be adopted:
and 1, if A is more than B, stopping executing high-voltage down operation, triggering a control instruction for cooling the power battery, and cooling the power battery.
And 2, if A is less than or equal to B, executing high-voltage down operation, and disconnecting the whole vehicle circuit.
Based on the scheme, whether the high-voltage power-down operation is continued or not can be judged according to the real-time temperature of the power battery, the temperature of the power battery can be reduced to a safe temperature before the actual high-voltage power-down operation, and the situation that the heat of the power battery cannot be discharged in time and the thermal runaway of the battery occurs is avoided. In one embodiment of the present application, in step S1 shown in fig. 1, controlling the cooling fluid circulation system to cool down the power battery may be performed according to the steps shown in fig. 4.
Referring to fig. 4, a flow chart of an electric vehicle control method according to an embodiment of the present application is shown, and specifically includes steps S106 to S107:
step S106, obtaining a predetermined cooling fluid flow rate for the cooling fluid circulation system.
And step S107, controlling the cooling fluid in the cooling fluid circulation system to flow in the power battery according to the preset cooling fluid flow rate so as to cool down the power battery.
In the application, the cooling fluid is adopted to cool the power battery, and flows in the power battery to absorb the heat of the battery core of the power battery, so that the temperature of the battery core is reduced to a safe temperature. The strength of cooling treatment can be controlled by setting the flow rate of cooling fluid, and the temperature of the power battery can be effectively reduced in time.
Based on the above, in one embodiment of the present application, the power battery includes at least one cell, and the predetermined cooling fluid flow rate for the cooling fluid circulation system may be obtained by:
and step 1, acquiring the cell temperature of each cell in the power battery.
And 2, determining a target battery cell with the battery cell temperature being greater than or equal to the battery temperature threshold.
And 3, determining the preset cooling fluid flow rate according to the number of the target battery cells, wherein the preset cooling fluid flow rate is positively correlated with the number of the target battery cells.
In actual use, the flow rate of the cooling fluid can be determined according to the number of the cells with thermal runaway inside the power battery, and the greater the number of the cells with thermal runaway, the higher the flow rate of the cooling fluid is controlled.
For example, in the existing power battery, the battery cells with the number A are in thermal runaway, the cooling fluid is controlled to cool the power battery at the flow rate B, the heat released by the battery cells is absorbed, and the thermal runaway of the battery cells is relieved; and a power battery, wherein the power battery is internally provided with the electric cores with the number of C, the power battery is cooled by controlling the cooling fluid at the flow rate of D, the heat released by the electric cores is absorbed, and the thermal runaway of the electric cores is relieved, wherein A is larger than C, and therefore B is larger than D. Based on the scheme, the cooling operation with different forces can be adopted according to the thermal runaway degree of the power battery, so that the thermal runaway of the power battery can be relieved in time, and the driver and passenger safety can be guaranteed in time.
In another embodiment of the application, the predetermined cooling fluid flow rate for the cooling fluid circulation system may also be obtained by:
and step 1, acquiring the cell temperature of each cell in the power battery.
And 2, summing the cell temperatures of all the cells in the power battery to obtain the total cell temperature.
And 3, determining the preset cooling fluid flow rate according to the total temperature of the battery cell, wherein the preset cooling fluid flow rate is positively correlated with the total temperature of the battery cell.
In actual use, the flow rate of the cooling fluid can be determined according to the total temperature of the battery core generated in the power battery, and the higher the total temperature of the battery core is, the higher the flow rate of the cooling fluid is controlled.
For example, in the existing power battery, thermal runaway occurs in the internal battery core, the battery core temperatures of the battery cores in the power battery are summed to obtain a total battery core temperature A, the cooling fluid is controlled to cool the power battery at a flow rate B, the heat released by the battery core is absorbed, and the thermal runaway of the battery core is relieved; and the power battery is further provided with a power battery, the internal battery cells are subjected to thermal runaway, the battery cell temperatures of all battery cells in the power battery are summed to obtain the total battery cell temperature C, the cooling fluid is controlled to cool the power battery at the flow rate D, the heat released by the battery cells is absorbed, and the thermal runaway of the battery cells is relieved, wherein A is more than C, and the flow rate B of the cooling fluid is more than D. Based on the scheme, the cooling operation with different forces can be adopted according to the thermal runaway degree of the power battery, so that the thermal runaway of the power battery can be relieved in time, and the driver and passenger safety can be guaranteed in time.
In one embodiment of steps S2-S3 shown in fig. 1, the cooling fluid temperature in the cooling fluid circulation system is obtained in real time, the cooling fluid temperature may be the temperature at the cooling fluid inlet of the power battery or the temperature at the cooling fluid outlet of the power battery, and if any one of the cooling fluid temperatures is greater than or equal to the cooling fluid temperature threshold, the cooling fluid circulation system is controlled to stop cooling the power battery.
For example, detecting that the cooling fluid temperature is higher than a set cooling fluid temperature threshold value at the cooling inlet, and controlling the cooling fluid circulation system to stop cooling the power battery; and detecting that the temperature of the cooling fluid is lower than a set cooling fluid temperature threshold value at the cooling fluid inlet, raising the temperature of the cooling fluid after heat exchange of the power battery, and controlling the cooling fluid circulation system to stop cooling the power battery after detecting that the temperature of the cooling fluid is higher than the set cooling fluid temperature threshold value at the cooling fluid outlet. Based on the scheme, the temperature of the cooling fluid can be detected in time and corresponding operation is carried out, so that the cooling treatment can be stopped as soon as possible when the temperature of the cooling fluid reaches the temperature threshold value of the cooling fluid, the cooling fluid circulation is stopped, the thermal runaway of the power battery is prevented from being aggravated by the cooling fluid with high temperature, and more serious accidents are avoided.
In one embodiment of the application, the cooling fluid temperature threshold may be set at 130 ℃. In actual operation, the inventor of the present application has found that the battery cell does not undergo thermal runaway in an environment of 130 ℃ for 30 minutes through a plurality of experiments. The temperature threshold of the cooling fluid is set to 130 ℃, so that the cooling fluid with the temperature of more than 130 ℃ can be prevented from contacting the battery core of the power battery, the temperature of the battery core is prevented from rising to 130 ℃, and the thermal runaway of the battery core is relieved.
In order that those skilled in the art will better understand the present application, a complete description of the embodiments will be provided.
In the existing electric automobile, a user finishes driving, controls the electric automobile to be powered down under high voltage, detects that the current temperature of a power battery is A, and presets a temperature threshold value as B, wherein A is more than B.
And controlling to stop high-voltage reduction, and controlling the cooling fluid circulation system to cool the power battery.
The temperature of the power battery is detected to be C, wherein C is smaller than B, the cooling fluid circulation system is controlled to stop cooling the power battery, the high-voltage power-down operation is continuously executed, the power battery temperature is successfully prevented from continuously rising after the high-voltage power-down operation, and accidents are avoided.
The description will be continued with another embodiment.
In the existing electric automobile, the abnormal temperature of the battery cells with the number A in the power battery is detected, and the thermal runaway is generated.
And controlling a cooling fluid circulation system to cool the power battery, wherein the cooling fluid circulation system adopts cooling liquid to cool the power battery, and simultaneously monitors the temperature of the cooling fluid.
After cooling treatment, the temperature of the battery core starts to drop, but the temperature of the cooling fluid is monitored to be higher than 130 ℃, the cooling fluid is immediately controlled to stop entering the power battery, the high-temperature cooling fluid entering the power battery is controlled to be discharged, the thermal runaway of the battery core of the power battery is successfully relieved, and accidents are avoided. The following describes an embodiment of the apparatus of the present application, which may be used to perform the electric vehicle control method in the above embodiment of the present application. For details not disclosed in the embodiment of the apparatus of the present application, please refer to the embodiment of the control method of the electric vehicle described above.
Fig. 5 shows a schematic diagram of an electric vehicle control device in one embodiment of the application.
Referring to fig. 5, an electric vehicle control apparatus 500 according to an embodiment of the present application includes: a first control unit 501, an acquisition unit 502, and a second acquisition unit 503.
Wherein, the first control unit 501 is configured to obtain a battery temperature of the power battery when receiving a high-voltage power-down instruction for the power battery; executing a high-voltage power-down instruction for the power battery when the battery temperature is less than a battery temperature threshold; when the battery temperature is greater than or equal to a battery temperature threshold, stopping executing a high-voltage power-down instruction for the power battery, and triggering a control instruction for cooling the power battery; when a control instruction for cooling the power battery is triggered, controlling the cooling fluid circulation system to cool the power battery; an acquisition unit 502 for acquiring the cooling fluid temperature in the cooling fluid circulation system in real time; and a second control unit 503 for controlling the cooling fluid circulation system to stop the cooling process for the power battery if the cooling fluid temperature is greater than or equal to a cooling fluid temperature threshold. Wherein, power battery includes at least one electric core, control cooling fluid circulation system carries out the cooling treatment to power battery, includes: acquiring the cell temperature of each cell in the power battery; determining a target cell having the cell temperature greater than or equal to the battery temperature threshold; determining the preset cooling fluid flow rate according to the number of the target battery cells, wherein the preset cooling fluid flow rate is positively correlated with the number of the target battery cells; and controlling the cooling fluid in the cooling fluid circulation system to flow in the power battery according to the preset cooling fluid flow rate so as to cool down the power battery.
Fig. 6 shows a schematic diagram of a computer system suitable for use in implementing an embodiment of the application.
It should be noted that, the computer system 600 of the electronic device shown in fig. 6 is only an example, and should not impose any limitation on the functions and the application scope of the embodiments of the present application.
As shown in fig. 6, the computer system 600 includes a central processing unit (Central Processing Unit, CPU) 601, which can perform various appropriate actions and processes according to a program stored in a Read-Only Memory (ROM) 602 or a program loaded from a storage section 608 into a random access Memory (Random Access Memory, RAM) 603, for example, performing the method described in the above embodiment. In the RAM 603, various programs and data required for system operation are also stored. The CPU 601, ROM 602, and RAM 603 are connected to each other through a bus 604. An Input/Output (I/O) interface 605 is also connected to bus 604.
The following components are connected to the I/O interface 605: an input portion 606 including a keyboard, mouse, etc.; an output portion 607 including a Cathode Ray Tube (CRT), a liquid crystal display (Liquid Crystal Display, LCD), and a speaker, etc.; a storage section 608 including a hard disk and the like; and a communication section 609 including a network interface card such as a LAN (Local Area Network ) card, a modem, or the like. The communication section 609 performs communication processing via a network such as the internet. The drive 610 is also connected to the I/O interface 605 as needed. Removable media 611 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is installed as needed on drive 610 so that a computer program read therefrom is installed as needed into storage section 608.
In particular, according to embodiments of the present application, the processes described above with reference to flowcharts may be implemented as computer software programs. For example, embodiments of the present application include a computer program product comprising a computer program embodied on a computer readable medium, the computer program comprising program code for performing the method shown in the flowcharts. In such an embodiment, the computer program may be downloaded and installed from a network through the communication portion 609, and/or installed from the removable medium 611. When executed by a Central Processing Unit (CPU) 601, performs the various functions defined in the system of the present application.
It should be noted that, the computer readable medium shown in the embodiments of the present application may be a computer readable signal medium or a computer readable storage medium, or any combination of the two. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples of the computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-Only Memory (ROM), an erasable programmable read-Only Memory (Erasable Programmable Read Only Memory, EPROM), flash Memory, an optical fiber, a portable compact disc read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In the present application, however, the computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, with the computer-readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the foregoing.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present application. Where each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams or flowchart illustration, and combinations of blocks in the block diagrams or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The units involved in the embodiments of the present application may be implemented by software, or may be implemented by hardware, and the described units may also be provided in a processor. Wherein the names of the units do not constitute a limitation of the units themselves in some cases.
As another aspect, the present application also provides a computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the electric vehicle control method described in the above embodiment.
As another aspect, the present application also provides a computer-readable medium that may be contained in the electronic device described in the above embodiment; or may exist alone without being incorporated into the electronic device. The computer-readable medium carries one or more programs that, when executed by one of the electronic devices, cause the electronic device to implement the electric vehicle control method described in the above embodiment.
It should be noted that although in the above detailed description several modules or units of a device for action execution are mentioned, such a division is not mandatory. Indeed, the features and functions of two or more modules or units described above may be embodied in one module or unit in accordance with embodiments of the application. Conversely, the features and functions of one module or unit described above may be further divided into a plurality of modules or units to be embodied.
From the above description of embodiments, those skilled in the art will readily appreciate that the example embodiments described herein may be implemented in software, or may be implemented in software in combination with the necessary hardware. Thus, the technical solution according to the embodiments of the present application may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (may be a CD-ROM, a U-disk, a mobile hard disk, etc.) or on a network, and includes several instructions to cause a computing device (may be a personal computer, a server, a touch terminal, or a network device, etc.) to perform the method according to the embodiments of the present application.
Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains.
It is to be understood that the application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (7)
1. An electric vehicle control method, characterized in that the electric vehicle comprises a power battery and a cooling fluid circulation system for cooling the power battery, the method comprising:
when a high-voltage power-down instruction for the power battery is received, acquiring the battery temperature of the power battery;
executing a high-voltage power-down instruction for the power battery when the battery temperature is less than a battery temperature threshold;
when the battery temperature is greater than or equal to a battery temperature threshold, stopping executing a high-voltage power-down instruction for the power battery, and triggering a control instruction for cooling the power battery;
when a control instruction for cooling the power battery is triggered, controlling the cooling fluid circulation system to cool the power battery;
acquiring the temperature of the cooling fluid in the cooling fluid circulation system in real time, and acquiring a preset cooling fluid flow rate aiming at the cooling fluid circulation system;
if the temperature of the cooling fluid is greater than or equal to a cooling fluid temperature threshold value, controlling the cooling fluid circulation system to stop cooling the power battery;
wherein, power battery includes at least one electric core, control cooling fluid circulation system carries out the cooling treatment to power battery, includes: acquiring the cell temperature of each cell in the power battery; determining a target cell having the cell temperature greater than or equal to the battery temperature threshold; determining the preset cooling fluid flow rate according to the number of the target battery cells, wherein the preset cooling fluid flow rate is positively correlated with the number of the target battery cells; and controlling the cooling fluid in the cooling fluid circulation system to flow in the power battery according to the preset cooling fluid flow rate so as to cool down the power battery.
2. The method according to claim 1, wherein the method further comprises:
detecting the thermal state of the power battery in real time;
and when the thermal state is detected to be in a runaway state, triggering a control instruction for cooling the power battery.
3. The method of claim 1, wherein the power cell includes at least one cell, the obtaining a predetermined cooling fluid flow rate for the cooling fluid circulation system comprising:
acquiring the cell temperature of each cell in the power battery;
summing the cell temperatures of all the cells in the power battery to obtain the total cell temperature;
and determining the preset cooling fluid flow rate according to the total temperature of the battery cells, wherein the preset cooling fluid flow rate is positively related to the total temperature of the battery cells.
4. A method according to any one of claims 1 to 3, wherein the cooling fluid temperature threshold is 130 ℃.
5. An electric vehicle control device, characterized in that the electric vehicle comprises a power battery and a cooling fluid circulation system for cooling the power battery, the device comprising:
a first control unit for acquiring a battery temperature of the power battery when a high-voltage power-down instruction for the power battery is received; executing a high-voltage power-down instruction for the power battery when the battery temperature is less than a battery temperature threshold; when the battery temperature is greater than or equal to a battery temperature threshold, stopping executing a high-voltage power-down instruction for the power battery, and triggering a control instruction for cooling the power battery; when a control instruction for cooling the power battery is triggered, controlling the cooling fluid circulation system to cool the power battery;
an acquisition unit configured to acquire a cooling fluid temperature in the cooling fluid circulation system in real time, and acquire a predetermined cooling fluid flow rate for the cooling fluid circulation system;
a second control unit for controlling the cooling fluid circulation system to stop the cooling process of the power battery if the cooling fluid temperature is greater than or equal to a cooling fluid temperature threshold;
wherein, power battery includes at least one electric core, control cooling fluid circulation system carries out the cooling treatment to power battery, includes: acquiring the cell temperature of each cell in the power battery; determining a target cell having the cell temperature greater than or equal to the battery temperature threshold; determining the preset cooling fluid flow rate according to the number of the target battery cells, wherein the preset cooling fluid flow rate is positively correlated with the number of the target battery cells; and controlling the cooling fluid in the cooling fluid circulation system to flow in the power battery according to the preset cooling fluid flow rate so as to cool down the power battery.
6. A computer-readable storage medium having stored therein at least one program code that is loaded and executed by a processor to implement the operations performed by the electric vehicle control method of any one of claims 1 to 4.
7. An electronic device comprising one or more processors and one or more memories, the one or more memories having stored therein at least one piece of program code that is loaded and executed by the one or more processors to implement the operations performed by the electric vehicle control method of any of claims 1-4.
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| CN202111044316.7A CN113829960B (en) | 2021-09-07 | 2021-09-07 | Electric automobile control method and device, medium and electronic equipment |
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| CN202111044316.7A CN113829960B (en) | 2021-09-07 | 2021-09-07 | Electric automobile control method and device, medium and electronic equipment |
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