CN113363619A - Vehicle lithium battery cooling method and device based on fluorinated liquid - Google Patents
Vehicle lithium battery cooling method and device based on fluorinated liquid Download PDFInfo
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- CN113363619A CN113363619A CN202110911098.6A CN202110911098A CN113363619A CN 113363619 A CN113363619 A CN 113363619A CN 202110911098 A CN202110911098 A CN 202110911098A CN 113363619 A CN113363619 A CN 113363619A
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 195
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 195
- 239000007788 liquid Substances 0.000 title claims abstract description 159
- 238000001816 cooling Methods 0.000 title claims abstract description 82
- 230000020169 heat generation Effects 0.000 claims abstract description 50
- 238000006243 chemical reaction Methods 0.000 claims abstract description 32
- 238000003682 fluorination reaction Methods 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000012546 transfer Methods 0.000 claims description 57
- 238000004364 calculation method Methods 0.000 claims description 20
- 239000000126 substance Substances 0.000 claims description 11
- 238000004590 computer program Methods 0.000 claims description 8
- 238000004422 calculation algorithm Methods 0.000 claims description 2
- 238000002347 injection Methods 0.000 abstract description 6
- 239000007924 injection Substances 0.000 abstract description 6
- 239000002699 waste material Substances 0.000 abstract description 5
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 abstract 1
- 230000006870 function Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000007726 management method Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000004035 construction material Substances 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Automation & Control Theory (AREA)
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- Life Sciences & Earth Sciences (AREA)
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Abstract
The application relates to a vehicle lithium battery cooling method, which comprises the following steps: the method comprises the steps of obtaining working current, end circuit voltage and open circuit voltage of a circuit where a vehicle lithium battery is located, calculating the end circuit voltage and the difference value of the open circuit voltage to obtain the working voltage of the vehicle lithium battery, measuring the battery volume and the current working temperature of the vehicle lithium battery, calculating the heat generation rate of the vehicle lithium battery according to the current working temperature, the battery volume, the working voltage and the working current, calculating the total heat conduction resistance of the vehicle lithium battery, calculating the heat generation rate and the energy conversion formula of the heat conduction resistance, utilizing the energy conversion formula to adjust the liquid volume of the fluoride liquid, and completing cooling of the vehicle lithium battery. The invention further discloses a lithium battery cooling device, electronic equipment and a storage medium based on the fluorinated liquid. The invention can solve the problem of resource waste caused by excessive injection of the fluorination liquid into the lithium battery of the vehicle.
Description
Technical Field
The invention relates to the field of automobile manufacturing, in particular to a method and a device for cooling a lithium battery of an automobile based on a fluorinated liquid, electronic equipment and a computer readable storage medium.
Background
With the technological progress, various industries are developed vigorously, and particularly in the field of automobiles, the conventional gasoline and diesel automobiles are gradually transited to hybrid and new energy automobiles and the like, wherein the hybrid and new energy automobiles mainly depend on automobile lithium batteries which are particularly important for cooling the automobile lithium batteries in the using process.
The conventional cooling method for the lithium battery of the vehicle mainly injects a fluorinated liquid around the lithium battery of the vehicle to effectively cool the lithium battery of the vehicle, but the general injection method for the fluorinated liquid only injects the cooled fluorinated liquid repeatedly, and does not consider the influences of energy transmission, the heat generation rate of the lithium battery of the vehicle and the like, so that the phenomenon that resources are wasted due to excessive injection of the fluorinated liquid is caused.
Disclosure of Invention
The invention provides a vehicle lithium battery cooling method and device based on a fluorinated liquid, electronic equipment and a computer readable storage medium, and mainly aims to solve the problem of resource waste caused by excessive fluorinated liquid injected into a vehicle lithium battery.
In order to achieve the purpose, the invention provides a lithium battery cooling method based on a fluorinated liquid, which comprises the following steps:
receiving a vehicle lithium battery cooling instruction, and acquiring the working current, the end circuit voltage and the open-circuit voltage of a circuit where a vehicle lithium battery is located according to the vehicle lithium battery cooling instruction;
calculating the difference value of the end circuit voltage and the open circuit voltage to obtain the working voltage of the lithium battery of the vehicle;
measuring the battery volume and the current working temperature of the lithium battery of the vehicle;
calculating the heat generation rate of the lithium battery of the vehicle according to the current working temperature, the battery volume, the working voltage and the working current;
injecting a fluorination liquid around the lithium battery, and calculating the total heat conduction resistance of the fluorination liquid and the lithium battery;
and constructing an energy conversion formula of the heat generation rate and the heat conduction resistance, and adjusting the liquid volume of the fluorinated liquid by using the energy conversion formula to finish cooling the lithium battery.
Optionally, the calculating the total thermal conductivity resistance of the fluorinated liquid and the lithium ion battery comprises:
extracting the resistance of the fluorinated liquid and the resistance of the lithium battery;
adding the resistance of the fluorinated liquid and the resistance of the lithium battery to obtain a serial resistance;
and calculating by using the serial resistance according to a parallel circuit calculation rule to obtain the total heat conduction resistance.
Optionally, the obtaining the total thermal conductivity resistance by using the serial resistance calculation according to a parallel circuit calculation rule includes:
the total thermal conductivity resistance is calculated according to the following formula:
wherein the content of the first and second substances,
as the total heat-conduction resistance, the resistance,
is the resistance of the lithium battery of the vehicle,
is the resistance of the fluorinated liquid and is,
is the series resistance.
Optionally, the constructing an energy conversion formula of the heat generation rate and the thermal conductivity resistance comprises:
respectively inquiring the heat conductivity coefficients of the lithium battery and the fluorinated liquid;
calculating the contact area of the lithium battery and a fluorination liquid channel in which the fluorination liquid is positioned;
calculating a heat transfer value by utilizing the heat conductivity coefficient of the lithium battery, the heat conductivity coefficient of the fluorinated liquid, the contact area and the heat generation rate to obtain a first heat transfer value;
calculating the heat transfer value of the heat conduction resistor to obtain a second heat transfer value;
and constructing and obtaining the energy conversion formula according to the first heat transfer value and the second heat transfer value.
Optionally, the calculating a heat transfer value by using the thermal conductivity of the lithium ion battery, the thermal conductivity of the fluorinated liquid, the contact area, and the heat generation rate to obtain a first heat transfer value includes:
calculating the first heat transfer value by using the following calculation method:
wherein the content of the first and second substances,
for the purpose of said first heat transfer value,
is the thermal conductivity of the fluorinated liquid,
is the heat transfer value of the heat-conducting resistance,
as the contact area, there is a contact area,
is that it isThe rate of heat generation is such that,
is a preset time period.
Optionally, the adjusting the liquid volume of the fluorinated liquid using the energy conversion formula includes:
calculating whether the first heat transfer value is greater than the second heat transfer value per unit time using the energy conversion formula;
if the first heat transfer value is not greater than the second heat transfer value, continuing to maintain the liquid volume of the fluorinated liquid unchanged;
if the first heat transfer value is greater than or equal to the second heat transfer value, increasing the liquid volume of the fluorinated liquid.
Optionally, the injecting a fluorinated liquid around the lithium battery includes:
judging whether the heat generation rate is greater than a preset rate threshold value or not;
and extracting the fluorinated liquid from the pre-constructed cooling system and injecting the fluorinated liquid into the lithium battery until the heat generation rate is greater than or equal to the rate threshold value.
In order to solve the above problems, the present invention further provides a lithium battery cooling device based on a fluorinated liquid, the device comprising:
the working voltage calculation module is used for receiving a vehicle lithium battery cooling instruction, acquiring the working current, the end circuit voltage and the open-circuit voltage of a circuit where a vehicle lithium battery is located according to the vehicle lithium battery cooling instruction, and calculating the difference value of the end circuit voltage and the open-circuit voltage to obtain the working voltage of the vehicle lithium battery;
the heat generation rate calculation module is used for measuring the battery volume and the current working temperature of the lithium battery of the vehicle, and calculating the heat generation rate of the lithium battery of the vehicle according to the current working temperature, the battery volume, the working voltage and the working current;
the total heat conduction resistance calculation module is used for injecting a fluorination liquid around the lithium battery and calculating the total heat conduction resistance of the fluorination liquid and the lithium battery;
and the battery cooling module is used for constructing an energy conversion formula of the heat generation rate and the heat conduction resistance, and adjusting the liquid volume of the fluorinated liquid by using the energy conversion formula to finish cooling the lithium battery of the vehicle.
In order to solve the above problem, the present invention also provides an electronic device, including:
a memory storing at least one instruction; and
and the processor executes the instructions stored in the memory to realize the lithium battery cooling method based on the fluorinated liquid.
In order to solve the above problem, the present invention further provides a computer-readable storage medium including a storage data area and a storage program area, the storage data area storing created data, the storage program area storing a computer program; wherein the computer program, when executed by a processor, implements any of the above-described fluorination liquid-based lithium battery cooling methods.
Compared with the prior art, the vehicle lithium battery cooling system based on the fluorinated liquid respectively obtains the working current, the end circuit voltage and the open circuit voltage of the circuit where the vehicle lithium battery is located according to the vehicle lithium battery cooling instruction, further calculates the working voltage of the vehicle lithium battery, and simultaneously calculates the heat generation rate of the vehicle lithium battery by combining the battery volume and the current working temperature of the vehicle lithium battery, wherein the heat generation rate represents the heat generated by the vehicle lithium battery within the current working temperature, and can provide a basis for the subsequent volume injected by the fluorinated liquid The device and the computer readable storage medium, the volume of the injected fluorination liquid is dynamically changed, so that the phenomenon of resource waste caused by excessive injection of the fluorination liquid into the lithium battery of the vehicle can be solved.
Drawings
Fig. 1 is a system diagram of a lithium battery cooling method based on a fluorinated liquid according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a lithium battery cooling method based on a fluorinated liquid according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of S6 in the method for cooling a lithium battery based on a fluorinated liquid according to an embodiment of the present invention;
FIG. 4 is a diagram of another system for a lithium battery cooling method based on a fluorinated liquid according to an embodiment of the present invention;
FIG. 5 is a schematic block diagram of a lithium battery cooling device based on a fluorinated liquid according to an embodiment of the present invention;
fig. 6 is a schematic internal structural diagram of an electronic device for implementing a lithium battery cooling method based on a fluorinated liquid according to an embodiment of the present invention;
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the invention provides a lithium car battery cooling method based on a fluorinated liquid, and an execution subject of the lithium car battery cooling method based on the fluorinated liquid includes but is not limited to at least one of a server, a terminal and other electronic devices which can be configured to execute the method provided by the embodiment of the invention. In other words, the lithium battery cooling method based on the fluorinated liquid may be performed by software or hardware installed in a terminal device or a server device, and the software may be a block chain platform. The server includes but is not limited to: a single server, a server cluster, a cloud server or a cloud server cluster, and the like.
Referring to fig. 1, a lithium battery cooling system based on a fluorinated liquid is provided according to an embodiment of the present invention. In this embodiment, the system includes a cooling system, a lithium battery, and a fluorinated liquid channel. In detail, the embodiment of the present invention specifically includes:
receiving a lithium battery cooling instruction of the vehicle, extracting a fluorinated liquid by using the cooling system, and inputting the fluorinated liquid into the fluorinated liquid channel;
and judging whether the heat generation rate of the lithium car battery is smaller than a specified threshold value or not within a preset time period, and if so, stopping the input of the fluorinated liquid to finish the cooling of the lithium car battery.
Fig. 2 is a schematic flow chart of a lithium battery cooling method based on a fluorinated liquid according to an embodiment of the present invention. In this embodiment, the method for cooling a lithium battery for a vehicle based on a fluorinated liquid includes:
s1, receiving a vehicle lithium battery cooling instruction, and obtaining the working current, the end circuit voltage and the open circuit voltage of the circuit where the vehicle lithium battery is located according to the vehicle lithium battery cooling instruction.
According to one embodiment of the invention, the lithium battery cooling instruction can be sent by a user, for example, in the field of intelligent automobiles, the temperature of the lithium battery in the intelligent automobile may be too high due to too long running time of the intelligent automobile driven by the user, so that the user can use a display panel of the intelligent automobile to generate the lithium battery cooling instruction.
In another embodiment of the invention, the system can be used for intelligently sending the vehicle lithium battery cooling instruction, and in detail, if the intelligent vehicle runs for three hours, the intelligent vehicle system can automatically trigger the vehicle lithium battery cooling instruction.
Further, after receiving a lithium battery cooling instruction, the work current, the end circuit voltage and the open circuit voltage of the lithium battery can be respectively read by using an ammeter and a voltmeter. The end circuit voltage is the voltage at two ends of an external circuit in a circuit where the lithium battery of the vehicle is located, and the open circuit voltage is the power supply voltage of the lithium battery of the vehicle.
And S2, calculating the difference value of the end circuit voltage and the open circuit voltage to obtain the working voltage of the lithium battery of the vehicle.
In the embodiment of the invention, the working voltage of the lithium battery of the vehicle is calculated by using the following calculation method:
wherein the content of the first and second substances,
for the purpose of the said operating voltage,
for the purpose of the end-circuit voltage,
is the open circuit voltage.
And S3, measuring the battery volume and the current working temperature of the lithium battery of the vehicle.
In the embodiment of the invention, an automatic volume measuring instrument can be used for measuring the battery volume of the lithium car battery, or the battery volume of the lithium car battery is extracted from the product specification of the lithium car battery.
In addition, the temperature measuring instrument is installed in advance outside the vehicle lithium battery, and the working temperature of the vehicle lithium battery can be obtained in real time.
And S4, calculating the heat generation rate of the vehicle lithium battery according to the current working temperature, the battery volume, the working voltage and the working current.
In the embodiment of the present invention, the heat generation rate represents the heat generated by the lithium battery per square meter in unit time, and the heat generation rate of the lithium battery can be calculated by using the following calculation method:
wherein the content of the first and second substances,
is the heat generation rate in
，
For the purpose of the said operating current, the current,
is the volume of the battery cell, and,
for the purpose of the said operating voltage,
in order to be the current operating temperature, the temperature of the air conditioner is controlled,
and representing the change of the end circuit voltage along with the change of the working temperature for the temperature coefficient of the end circuit voltage and the current working temperature.
And S5, injecting a fluorination liquid around the lithium car battery, and calculating the total heat conduction resistance of the fluorination liquid and the lithium car battery.
In an embodiment of the present invention, the injecting a fluorinated liquid around the lithium battery includes:
judging whether the heat generation rate is greater than a preset rate threshold value or not;
and extracting the fluorinated liquid from the pre-constructed cooling system and injecting the fluorinated liquid into the lithium battery until the heat generation rate is greater than or equal to the rate threshold value.
In the embodiment of the invention, when the heat generation rate of the lithium battery is too low, the lithium battery is low in utilization rate at present, and the automobile may be in a waiting driving stage, so that the fluorinated liquid can not be injected temporarily for saving resources.
Further, the calculating the total thermal conductivity resistance of the fluorinated liquid and the lithium ion battery comprises:
extracting the resistance of the fluorinated liquid and the resistance of the lithium battery;
adding the resistance of the fluorinated liquid and the resistance of the lithium battery to obtain a serial resistance;
and calculating by using the serial resistance according to a parallel circuit calculation rule to obtain the total heat conduction resistance.
In the embodiment of the invention, the resistance of the fluorinated liquid and the resistance of the lithium battery are generally input into a system in advance, and can be directly extracted when the total heat conduction resistance needs to be calculated.
In addition, in the embodiment of the present invention, the total thermal conductivity is calculated by using the following calculation formula:
wherein the content of the first and second substances,
as the total heat-conduction resistance, the resistance,
is the resistance of the lithium battery of the vehicle,
is the resistance of the fluorinated liquid and is,
is the series resistance.
S6, constructing an energy conversion formula of the heat generation rate and the heat conduction resistance, and adjusting the liquid volume of the fluorinated liquid by using the energy conversion formula until the heat conduction resistance meets the heat generation rate, thereby completing cooling of the lithium battery.
In detail, referring to fig. 3, the constructing an energy conversion formula of the heat generation rate and the thermal conductivity resistance includes:
s61, respectively inquiring the heat conductivity coefficients of the lithium battery and the fluorinated liquid;
s62, calculating the contact area of the lithium battery and a fluorination liquid channel where the fluorination liquid is located;
s63, calculating a heat transfer value by utilizing the heat conductivity coefficient of the lithium battery, the heat conductivity coefficient of the fluorinated liquid, the contact area and the heat generation rate to obtain a first heat transfer value;
s64, calculating the heat transfer value of the heat conduction resistor to obtain a second heat transfer value;
and S65, constructing and obtaining the energy conversion formula according to the first heat transfer value and the second heat transfer value.
In detail, different materials correspond to different thermal conductivity coefficients, wherein the thermal conductivity coefficient of the fluorinated liquid can be directly determined, and the thermal conductivity coefficient of the lithium battery needs to be determined according to the corresponding construction materials.
In a preferred embodiment of the present invention, the contact area ratio is generally 30% to 100%, as shown in fig. 1, the contact area between the lithium battery and the fluorinated liquid channel is one hundred percent, and in another embodiment of the present invention, as shown in fig. 4, the contact area between the lithium battery and the fluorinated liquid channel is fifty percent.
Further, the calculation method of the first heat transfer value is as follows:
wherein the content of the first and second substances,
for the purpose of said first heat transfer value,
is the thermal conductivity of the fluorinated liquid,
is the heat transfer value of the heat-conducting resistance,
as the contact area, there is a contact area,
as the rate of heat generation, for example,
the preset time period may be 5 seconds, 3 seconds, or the like.
In an embodiment of the present invention, the second heat transfer value may be calculated by using the following formula:
wherein the content of the first and second substances,
for the said second heat transfer value is,
is the current of the circuit in which the heat-conducting resistor is located,
and the preset time period is set.
Further, the energy conversion formula expresses that the first heat transfer value cannot be greater than the second heat transfer value per unit time, specifically:
wherein the content of the first and second substances,
in an embodiment of the present invention, the adjusting the liquid volume of the fluorinated liquid by using the energy conversion formula includes:
calculating whether the first heat transfer value is greater than the second heat transfer value per unit time using the energy conversion formula;
if the first heat transfer value is not greater than the second heat transfer value, continuing to maintain the liquid volume of the fluorinated liquid unchanged;
if the first heat transfer value is greater than or equal to the second heat transfer value, increasing the liquid volume of the fluorinated liquid.
And if the first heat transfer value is larger than the second heat transfer value, increasing the liquid volume of the fluorinated liquid so as to improve the second heat transfer value and take away more heat transfer values, thereby cooling the lithium battery.
The embodiment of the invention respectively obtains the working current, the end circuit voltage and the open circuit voltage of the circuit where the vehicle lithium battery is located according to the vehicle lithium battery cooling instruction, and further calculates the working voltage of the vehicle lithium battery, and simultaneously calculates the heat generation rate of the vehicle lithium battery by combining the battery volume and the current working temperature of the vehicle lithium battery, wherein the heat generation rate represents the heat generated by the vehicle lithium battery within the current working temperature, and can provide a basis for the volume of the subsequent fluorinated liquid injection, furthermore, the invention firstly injects the fluorinated liquid, calculates the total heat conduction resistance with the vehicle lithium battery by the injected fluorinated liquid, and calculates the liquid volume of the fluorinated liquid in real time by an energy conversion formula, thereby dynamically adjusting the liquid volume of the injected fluorinated liquid, therefore, the vehicle lithium battery cooling method, device and computer readable storage medium based on the fluorinated liquid provided by the invention have the volume of the injected fluorinated liquid dynamically changed, therefore, the phenomenon of resource waste caused by excessive injection of the fluorinated liquid into the lithium battery of the vehicle can be solved.
Fig. 5 is a schematic block diagram of a lithium battery cooling device based on a fluorinated liquid for a vehicle according to the present invention.
The lithium battery cooling device 100 for vehicles based on fluorinated liquid according to the present invention can be installed in an electronic device. According to the realized functions, the lithium battery cooling device based on the fluorinated liquid can comprise an operating voltage calculating module 101, a heat generation rate calculating module 102, a total heat conduction resistance calculating module 103 and a battery cooling module 104. A module according to the present invention, which may also be referred to as a unit, refers to a series of computer program segments that can be executed by a processor of an electronic device and that can perform a fixed function, and that are stored in a memory of the electronic device.
In the present embodiment, the functions regarding the respective modules/units are as follows:
the working voltage calculation module 101 is configured to receive a vehicle lithium battery cooling instruction, obtain a working current, a terminal voltage, and an open-circuit voltage of a circuit in which a vehicle lithium battery is located according to the vehicle lithium battery cooling instruction, and calculate a difference between the terminal voltage and the open-circuit voltage to obtain a working voltage of the vehicle lithium battery;
the heat generation rate calculation module 102 is configured to measure a battery volume and a current working temperature of the lithium battery, and calculate a heat generation rate of the lithium battery according to the current working temperature, the battery volume, the working voltage, and the working current;
the total heat conduction resistance calculation module 103 is configured to inject a fluorinated liquid around the lithium car battery, and calculate a total heat conduction resistance between the fluorinated liquid and the lithium car battery;
the battery cooling module 104 is configured to construct an energy conversion formula of the heat generation rate and the heat conduction resistance, and adjust the liquid volume of the fluorinated liquid by using the energy conversion formula to complete cooling of the lithium battery.
Each module in the lithium car battery cooling device 100 based on the fluorinated liquid provided by the embodiment of the present invention can use the same means as the above lithium car battery cooling method based on the fluorinated liquid, and specific implementation steps are not repeated herein, and the technical effect generated by the functions of each module/unit is the same as the technical effect of the above lithium car battery cooling method based on the fluorinated liquid, that is, the phenomenon of resource waste caused by too much fluorinated liquid injected into the lithium car battery can be solved.
Fig. 6 is a schematic structural diagram of an electronic device for implementing a method for cooling a lithium battery of a vehicle based on a fluorinated liquid according to the present invention.
The electronic device 1 may comprise a processor 10, a memory 11 and a bus, and may further comprise a computer program, such as a lithium fluoride-based automotive battery cooling program 12, stored in the memory 11 and executable on the processor 10.
The memory 11 includes at least one type of readable storage medium, which includes flash memory, removable hard disk, multimedia card, card-type memory (e.g., SD or DX memory, etc.), magnetic memory, magnetic disk, optical disk, etc. The memory 11 may in some embodiments be an internal storage unit of the electronic device 1, such as a removable hard disk of the electronic device 1. The memory 11 may also be an external storage device of the electronic device 1 in other embodiments, such as a plug-in mobile hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, which are provided on the electronic device 1. Further, the memory 11 may also include both an internal storage unit and an external storage device of the electronic device 1. The memory 11 may be used not only to store application software installed in the electronic device 1 and various types of data, such as codes of the lithium battery cooling program 12 based on the fluorinated liquid, but also to temporarily store data that has been output or will be output.
The processor 10 may be composed of an integrated circuit in some embodiments, for example, a single packaged integrated circuit, or may be composed of a plurality of integrated circuits packaged with the same or different functions, including one or more Central Processing Units (CPUs), microprocessors, digital Processing chips, graphics processors, and combinations of various control chips. The processor 10 is a Control Unit (Control Unit) of the electronic device, connects various components of the electronic device by using various interfaces and lines, and executes various functions and processes data of the electronic device 1 by running or executing programs or modules stored in the memory 11 (for example, executing a lithium battery cooling program based on a fluorinated liquid, etc.), and calling data stored in the memory 11.
The bus may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. The bus is arranged to enable connection communication between the memory 11 and at least one processor 10 or the like.
Fig. 6 only shows an electronic device with components, and it will be understood by a person skilled in the art that the structure shown in fig. 6 does not constitute a limitation of the electronic device 1, and may comprise fewer or more components than shown, or a combination of certain components, or a different arrangement of components.
For example, although not shown, the electronic device 1 may further include a power supply (such as a battery) for supplying power to each component, and preferably, the power supply may be logically connected to the at least one processor 10 through a power management device, so as to implement functions of charge management, discharge management, power consumption management, and the like through the power management device. The power supply may also include any component of one or more dc or ac power sources, recharging devices, power failure detection circuitry, power converters or inverters, power status indicators, and the like. The electronic device 1 may further include various sensors, a bluetooth module, a Wi-Fi module, and the like, which are not described herein again.
Further, the electronic device 1 may further include a network interface, and optionally, the network interface may include a wired interface and/or a wireless interface (such as a WI-FI interface, a bluetooth interface, etc.), which are generally used for establishing a communication connection between the electronic device 1 and other electronic devices.
Optionally, the electronic device 1 may further comprise a user interface, which may be a Display (Display), an input unit (such as a Keyboard), and optionally a standard wired interface, a wireless interface. Alternatively, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an OLED (Organic Light-Emitting Diode) touch device, or the like. The display, which may also be referred to as a display screen or display unit, is suitable for displaying information processed in the electronic device 1 and for displaying a visualized user interface, among other things.
It is to be understood that the embodiments described are for illustrative purposes only and that the scope of the claimed invention is not limited to this configuration.
The fluorinated liquid-based automotive lithium battery cooling program 12 stored in the memory 11 of the electronic device 1 is a combination of instructions that, when executed in the processor 10, enable:
receiving a vehicle lithium battery cooling instruction, and acquiring the working current, the end circuit voltage and the open-circuit voltage of a circuit where a vehicle lithium battery is located according to the vehicle lithium battery cooling instruction;
calculating the difference value of the end circuit voltage and the open circuit voltage to obtain the working voltage of the lithium battery of the vehicle;
measuring the battery volume and the current working temperature of the lithium battery of the vehicle;
calculating the heat generation rate of the lithium battery of the vehicle according to the current working temperature, the battery volume, the working voltage and the working current;
injecting a fluorination liquid around the lithium battery, and calculating the total heat conduction resistance of the fluorination liquid and the lithium battery;
and constructing an energy conversion formula of the heat generation rate and the heat conduction resistance, and adjusting the liquid volume of the fluorinated liquid by using the energy conversion formula to finish cooling the lithium battery.
Further, the integrated modules/units of the electronic device 1, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. The computer-readable medium may include: any entity or device capable of carrying said computer program code, recording medium, U-disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM).
Further, the computer usable storage medium may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function, and the like; the storage data area may store data created according to the use of the blockchain node, and the like.
The present invention also provides a computer-readable storage medium, storing a computer program which, when executed by a processor of an electronic device, may implement:
receiving a vehicle lithium battery cooling instruction, and acquiring the working current, the end circuit voltage and the open-circuit voltage of a circuit where a vehicle lithium battery is located according to the vehicle lithium battery cooling instruction;
calculating the difference value of the end circuit voltage and the open circuit voltage to obtain the working voltage of the lithium battery of the vehicle;
measuring the battery volume and the current working temperature of the lithium battery of the vehicle;
calculating the heat generation rate of the lithium battery of the vehicle according to the current working temperature, the battery volume, the working voltage and the working current;
injecting a fluorination liquid around the lithium battery, and calculating the total heat conduction resistance of the fluorination liquid and the lithium battery;
and constructing an energy conversion formula of the heat generation rate and the heat conduction resistance, and adjusting the liquid volume of the fluorinated liquid by using the energy conversion formula to finish cooling the lithium battery.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus, device and method can be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules is only one logical functional division, and other divisions may be realized in practice.
The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
In addition, functional modules in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional module.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof.
The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any accompanying claims should not be construed as limiting the claim concerned.
The block chain is a novel application mode of computer technologies such as distributed data storage, point-to-point transmission, a consensus mechanism, an encryption algorithm and the like. A block chain (Blockchain), which is essentially a decentralized database, is a series of data blocks associated by using a cryptographic method, and each data block contains information of a batch of network transactions, so as to verify the validity (anti-counterfeiting) of the information and generate a next block. The blockchain may include a blockchain underlying platform, a platform product service layer, an application service layer, and the like.
Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. A plurality of units or means recited in the system claims may also be implemented by one unit or means in software or hardware. The terms second, etc. are used to denote names, but not any particular order.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A vehicle lithium battery cooling method based on fluorinated liquid is characterized by comprising the following steps:
receiving a vehicle lithium battery cooling instruction, and acquiring the working current, the end circuit voltage and the open-circuit voltage of a circuit where a vehicle lithium battery is located according to the vehicle lithium battery cooling instruction;
calculating the difference value of the end circuit voltage and the open circuit voltage to obtain the working voltage of the lithium battery of the vehicle;
measuring the battery volume and the current working temperature of the lithium battery of the vehicle;
calculating the heat generation rate of the lithium battery of the vehicle according to the current working temperature, the battery volume, the working voltage and the working current;
injecting a fluorination liquid around the lithium battery, and calculating the total heat conduction resistance of the fluorination liquid and the lithium battery;
and constructing an energy conversion formula of the heat generation rate and the heat conduction resistance, and adjusting the liquid volume of the fluorinated liquid by using the energy conversion formula to finish cooling the lithium battery.
2. The method for cooling a vehicular lithium battery based on a fluorinated liquid according to claim 1, wherein the calculating the total thermal conductivity resistance of the fluorinated liquid and the vehicular lithium battery comprises:
extracting the resistance of the fluorinated liquid and the resistance of the lithium battery;
adding the resistance of the fluorinated liquid and the resistance of the lithium battery to obtain a serial resistance;
and calculating by using the serial resistance according to a parallel circuit calculation rule to obtain the total heat conduction resistance.
3. The method of claim 2, wherein the calculating the total thermal conductivity resistance using the series resistance according to a parallel circuit algorithm comprises:
the total thermal conductivity resistance is calculated according to the following formula:
wherein the content of the first and second substances,
as the total heat-conduction resistance, the resistance,
is the resistance of the lithium battery of the vehicle,
is the resistance of the fluorinated liquid and is,
is the series resistance.
4. The method of claim 1, wherein the constructing an energy conversion equation of the heat generation rate and the thermal conductivity resistance comprises:
respectively inquiring the heat conductivity coefficients of the lithium battery and the fluorinated liquid;
calculating the contact area of the lithium battery and a fluorination liquid channel in which the fluorination liquid is positioned;
calculating a heat transfer value by utilizing the heat conductivity coefficient of the lithium battery, the heat conductivity coefficient of the fluorinated liquid, the contact area and the heat generation rate to obtain a first heat transfer value;
calculating the heat transfer value of the heat conduction resistor to obtain a second heat transfer value;
and constructing and obtaining the energy conversion formula according to the first heat transfer value and the second heat transfer value.
5. The method according to claim 4, wherein the calculating a heat transfer value using the thermal conductivity of the lithium car battery, the thermal conductivity of the fluorinated liquid, the contact area, and the heat generation rate to obtain a first heat transfer value comprises:
calculating the first heat transfer value by using the following calculation method:
wherein the content of the first and second substances,
for the purpose of said first heat transfer value,
is the thermal conductivity of the fluorinated liquid,
is the heat transfer value of the heat-conducting resistance,
as the contact area, there is a contact area,
as the rate of heat generation, for example,
is a preset time period.
6. The method of claim 5, wherein said adjusting a liquid volume of said fluorinated liquid using said energy conversion formula comprises:
calculating whether the first heat transfer value is greater than the second heat transfer value per unit time using the energy conversion formula;
if the first heat transfer value is not greater than the second heat transfer value, continuing to maintain the liquid volume of the fluorinated liquid unchanged;
if the first heat transfer value is greater than or equal to the second heat transfer value, increasing the liquid volume of the fluorinated liquid.
7. The method for cooling lithium car batteries based on fluorinated liquid according to any one of claims 1 to 6, wherein the step of injecting fluorinated liquid around the lithium car batteries comprises the following steps:
judging whether the heat generation rate is greater than a preset rate threshold value or not;
and extracting the fluorinated liquid from the pre-constructed cooling system and injecting the fluorinated liquid into the lithium battery until the heat generation rate is greater than or equal to the rate threshold value.
8. A vehicle lithium battery cooling device based on fluorinated liquid is characterized in that the device comprises:
the working voltage calculation module is used for receiving a vehicle lithium battery cooling instruction, acquiring the working current, the end circuit voltage and the open-circuit voltage of a circuit where a vehicle lithium battery is located according to the vehicle lithium battery cooling instruction, and calculating the difference value of the end circuit voltage and the open-circuit voltage to obtain the working voltage of the vehicle lithium battery;
the heat generation rate calculation module is used for measuring the battery volume and the current working temperature of the lithium battery of the vehicle, and calculating the heat generation rate of the lithium battery of the vehicle according to the current working temperature, the battery volume, the working voltage and the working current;
the total heat conduction resistance calculation module is used for injecting a fluorination liquid around the lithium battery and calculating the total heat conduction resistance of the fluorination liquid and the lithium battery;
and the battery cooling module is used for constructing an energy conversion formula of the heat generation rate and the heat conduction resistance, and adjusting the liquid volume of the fluorinated liquid by using the energy conversion formula to finish cooling the lithium battery of the vehicle.
9. An electronic device, characterized in that the electronic device comprises:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1 to 7.
10. A computer-readable storage medium comprising a storage data area and a storage program area, wherein the storage data area stores created data, and the storage program area stores a computer program; wherein the computer program when executed by a processor implements the method for cooling a vehicular lithium battery based on a fluorinated liquid according to any one of claims 1 to 7.
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