CN113954695A - Electric automobile battery cooling control method, device, equipment and vehicle - Google Patents
Electric automobile battery cooling control method, device, equipment and vehicle Download PDFInfo
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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
- 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
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/545—Temperature
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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
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Abstract
The invention provides a method, a device, equipment and a vehicle for controlling cooling of an electric automobile battery, wherein the method comprises the following steps: when a battery starts to be charged, detecting the current charging power, the current SOC and the current cell temperature of the battery in real time; obtaining a current core temperature threshold value according to the current charging power and the current SOC; when the current cell temperature is greater than the current cell temperature threshold, cooling the battery; the current charging power and the SOC of the battery are introduced into the core temperature threshold value of the battery for cooling, the battery cooling requirements of charging piles with different powers in each charging stage in the charging process can be met, the battery cooling control is more flexible, the waste of cooling energy consumption during charging is reduced, and the charging speed is improved.
Description
Technical Field
The invention relates to the technical field of electric automobiles, in particular to a method, a device, equipment and a vehicle for controlling battery cooling of an electric automobile.
Background
In the process of charging batteries of electric automobiles, part of electric energy is converted into chemical energy, and the other part of electric energy is converted into heat energy, so that the rechargeable batteries are heated, and excessive heating of the batteries not only reduces charging current and causes slow charging, but also accelerates the decay rate of the service life of the batteries, and once thermal runaway is caused, personal and property injuries such as explosion or fire are easily caused; therefore, the rechargeable battery needs to be cooled. With the increase of the driving mileage of the electric vehicle and the improvement of the energy density of the battery, the scheme of actively cooling the battery of the electric vehicle gradually becomes the mainstream. For example, a liquid cooling battery cooling system is arranged, a heat exchanger is used for obtaining cooling liquid from an air conditioning system, and then the cooling liquid is brought to a battery which generates heat through an electric water pump, a cooling plate inside the battery, a pipeline and the like, so that the battery is cooled, and the battery is kept within a proper working temperature. However, the existing battery charging and cooling process has unnecessary cooling frequency, which causes unnecessary energy consumption, and also causes the battery charging speed to become slow, so that the requirements of quick charging and low energy consumption for battery charging at present cannot be met.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a method, an apparatus, a device, a storage medium, and a vehicle for controlling cooling of a battery of an electric vehicle, which can reduce waste of cooling energy consumption and increase a charging rate.
In a first aspect, an embodiment of the present invention provides a method for controlling cooling of an electric vehicle battery, including:
when a battery starts to be charged, detecting the current charging power, the current SOC and the current cell temperature of the battery in real time;
obtaining a current core temperature threshold value according to the current charging power and the current SOC;
and when the current cell temperature is greater than the current cell temperature threshold, cooling the battery.
As an improvement of the foregoing solution, when the current cell temperature is greater than the current cell temperature threshold, cooling the battery includes:
when the current cell temperature is greater than the current cell temperature threshold, calculating a cooling threshold according to the current cell temperature threshold and a preset hysteresis temperature;
when the current cell temperature is lower than the cooling threshold value, continuing to cool the battery;
and when the current cell temperature is greater than or equal to the cooling threshold, finishing cooling the battery.
As an improvement of the above solution, the calculating a cooling threshold according to the current core temperature threshold and a preset hysteresis temperature includes:
and calculating the difference value between the current core temperature threshold value and the hysteresis temperature to obtain a cooling threshold value.
As an improvement of the above scheme, the obtaining a current core temperature threshold according to the current charging power and the current SOC includes:
and acquiring a current core temperature threshold value according to the current charging power and the current SOC through a preset battery core temperature threshold value mapping relation.
As an improvement of the above scheme, the battery core temperature threshold value mapping relation is a battery core temperature threshold value table; the value of the charging power in the battery core temperature threshold value table is changed in a step mode, and the value of the SOC in the battery core temperature threshold value table is changed at equal intervals.
As an improvement of the above, the method further comprises:
and when the current cell temperature is less than or equal to the current cell temperature threshold, determining that the battery is not cooled.
In a second aspect, an embodiment of the present invention provides an electric vehicle battery cooling control apparatus, including:
the information detection module is used for detecting the current charging power, the current SOC and the current cell temperature of the battery in real time when the battery starts to be charged;
the core temperature threshold value obtaining module is used for obtaining a current core temperature threshold value according to the current charging power and the current SOC;
and the cooling control module is used for cooling the battery when the current cell temperature is greater than the current cell temperature threshold.
In a third aspect, an embodiment of the present invention provides an electric vehicle battery cooling control apparatus, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor 11, wherein the processor implements the electric vehicle battery cooling control method according to any one of the first aspect when executing the computer program.
In a fourth aspect, the embodiment of the present invention provides a computer-readable storage medium, where the computer-readable storage medium includes a stored computer program, where the computer program, when executed, controls an apparatus in which the computer-readable storage medium is located to perform the method for controlling cooling of a battery of an electric vehicle according to any one of the first aspects.
In a fifth aspect, an embodiment of the present invention provides a vehicle, including:
one or more processors;
a memory for storing one or more programs; when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the electric vehicle battery cooling control method according to any one of the first aspect.
Compared with the prior art, the embodiment of the invention has the beneficial effects that: when the battery of the electric automobile is charged, the current charging power, the current SOC and the current core temperature of the battery are detected in real time, the current core temperature threshold value under the current charging power and the current SOC is determined, then whether the battery has a cooling demand is judged according to the determined current core temperature threshold value and the current core temperature, if yes, the battery is cooled, and the current core temperature threshold value is determined through the current charging power and the current SOC of the battery, so that the battery cooling demand under charging piles of various charging stages and different powers in the charging process can be met, the battery cooling control is more flexible, the waste of cooling energy consumption during charging is reduced, and the charging speed is improved.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of a method for controlling cooling of a battery of an electric vehicle according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a cooling control process provided by an embodiment of the present invention;
fig. 3 is a schematic block diagram of a battery cooling control device of an electric vehicle according to an embodiment of the present invention;
fig. 4 is a schematic block diagram of a battery cooling control device of an electric vehicle according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1, the present invention provides a method for controlling battery cooling of an electric vehicle, including:
s11: when a battery starts to be charged, detecting the current charging power, the current SOC and the current cell temperature of the battery in real time;
s12: obtaining a current core temperature threshold value according to the current charging power and the current SOC;
s13: and when the current cell temperature is greater than the current cell temperature threshold, cooling the battery.
Further, when the current cell temperature is less than or equal to the current cell temperature threshold, it is determined that the battery is not cooled.
In the embodiment of the invention, when a battery of an electric automobile is charged, the current charging power, the current SOC and the current core temperature of the battery are detected in real time, the current core temperature threshold value under the current charging power and the current SOC is determined, then whether the battery has a cooling requirement is judged according to the determined current core temperature threshold value and the current core temperature, when the current core temperature is greater than the current core temperature threshold value, the battery is judged to have the cooling requirement, the battery is cooled, otherwise, the battery is judged not to have the cooling requirement, and the battery is not cooled. The current charging power and the current SOC of the battery are introduced into the judgment of the core temperature threshold value of the battery cooling, so that the battery cooling requirements of charging piles with different powers in each charging stage in the charging process can be met, the battery cooling control is more flexible, the waste of cooling energy consumption in charging is reduced, the charging speed is improved, and the requirements of quick charging and low energy consumption for battery charging at present are met. Meanwhile, the corresponding core temperature threshold is determined according to the current charging power and the current SOC for judging the cooling requirement of the battery, so that the charging safety of the battery can be improved.
In an optional embodiment, the cooling the battery when the current cell temperature is greater than the current cell temperature threshold includes:
when the current cell temperature is greater than the current cell temperature threshold, calculating a cooling threshold according to the current cell temperature threshold and a preset hysteresis temperature;
it should be noted that, in the embodiment of the present invention, the value of the hysteresis temperature is not specifically limited, and may be set according to the cooling effect required by the battery, for example, 5 ℃.
Further, a cooling threshold is obtained by calculating a difference between the current core temperature threshold and the hysteresis temperature.
When the current cell temperature is lower than the cooling threshold value, continuing to cool the battery;
and when the current cell temperature is greater than or equal to the cooling threshold, finishing cooling the battery.
In the embodiment of the invention, the hysteresis temperature is set, so that the current charging power and the core temperature threshold under the current SOC are reduced to a certain extent, and the energy consumption waste caused by frequent entering of a cooling state is avoided on the basis of not influencing the cooling of the battery.
In an optional embodiment, the obtaining a current core temperature threshold according to the current charging power and the current SOC includes:
and acquiring a current core temperature threshold value according to the current charging power and the current SOC through a preset battery core temperature threshold value mapping relation.
Further, the battery core temperature threshold value mapping relation is a battery core temperature threshold value table; the value of the charging power in the battery core temperature threshold value table is changed in a step mode, and the value of the SOC in the battery core temperature threshold value table is changed at equal intervals.
For example, the value of the charging power in the battery core temperature threshold table changes in a stepwise manner from small to large, for example, different charging powers may be set according to a set charging power interval, different charging powers may also be set according to a set functional relationship, and a plurality of specific charging powers may also be set according to the actual charging condition of the battery. The SOC value in the battery core temperature threshold value table is changed at equal intervals from small to large, for example, the SOC is changed in an increasing mode according to 10% intervals. After setting the SOC and the charging power in the battery core temperature threshold table, machine learning, actual testing or custom setting according to experience can be adopted to obtain the core temperature threshold corresponding to the optimal cooling effect of battery cooling under the corresponding SOC and the charging power, and the battery core temperature threshold table is recorded. In the embodiment of the invention, the SOC and the charging power in the battery core temperature threshold value table are calibrated and quantified, the calibration space is large, and the calibration mode is flexible and changeable, so that the calibration of the core temperature threshold values under different SOCs and charging powers can be realized, and different battery cooling effects can be realized.
As shown in the following table, a battery core temperature threshold table under different charging powers and different SOCs is given;
for the scene adopting alternating current charging, as the charging power is lower, in order to reduce the whole-course cooling frequency, the core temperature is required to be lower when the SOC is fully charged, therefore, a higher core temperature threshold value can be set at the low SOC stage, and a lower core temperature threshold value is set at the high SOC stage, namely when the SOC in the battery core temperature threshold value table changes from small to large, the corresponding core temperature threshold value changes from large to small.
For a direct-current high-power charging scene, in order to reduce charging energy consumption and accelerate charging speed, a lower core temperature threshold value can be set at a low SOC stage, and a higher core temperature threshold value is set at a high SOC stage, namely when the SOC in the battery core temperature threshold value table changes from small to large, the corresponding core temperature threshold value changes from small to large.
The change rule that the core temperature threshold value corresponds to the charging power and the SOC in the battery core temperature threshold value table is preset, so that the corresponding core temperature threshold value can be inquired according to different charging powers and SOCs, the battery cooling requirement judgment can be realized, the battery cooling control of direct current and alternating current charging can be compatible, and the battery cooling requirement when charging is carried out by adopting charging piles with different powers can be met.
For a more clear explanation of the present embodiment, the cooling control process of the battery charging will be described below with reference to fig. 2:
step 1: after the battery starts to be charged, detecting the current charging power, the current cell temperature and the current SOC;
step 2: determining a core temperature threshold value of battery cooling according to the current charging power and the current core temperature;
and step 3: judging whether the battery meets the cooling requirement or not; when the current cell temperature in the step 1 is greater than the cell temperature threshold in the step 2, the battery is considered to meet the cooling requirement; if not, not cooling, if yes, executing the next step;
and 4, step 4: whether the current battery core temperature is smaller than the difference value between the core temperature threshold value and the hysteresis temperature or not; if so, cooling is performed, and if not, cooling is finished.
Compared with the prior art, the embodiment of the invention has the beneficial effects that:
1. the current charging power and the current SOC of the battery are introduced into the judgment of the core temperature threshold value of the battery cooling, so that the battery cooling requirements of charging piles with different powers in each charging stage in the charging process can be met, the battery cooling control is more flexible, the waste of cooling energy consumption in charging is reduced, the charging speed is improved, and the requirements of quick charging and low energy consumption for battery charging at present are met.
2. The SOC and the charging power in the battery core temperature threshold value table are calibrated and quantified, the calibration space is large, and the calibration mode is flexible and changeable, so that the calibration of the core temperature threshold values under different SOCs and charging powers can be realized, and different battery cooling effects can be realized.
3. Through presetting the change rule of the core temperature threshold value corresponding to the charging power and the SOC in the battery core temperature threshold value table, the battery cooling control of direct current and alternating current charging can be compatible, and the battery cooling requirement when charging is carried out by adopting charging piles with different powers is met.
Example two
Referring to fig. 3, an embodiment of the present invention provides a battery cooling control device for an electric vehicle, including:
the system comprises an information detection module 1, a power control module and a power control module, wherein the information detection module is used for detecting the current charging power, the current SOC and the current cell temperature of a battery in real time when the battery starts to be charged;
the core temperature threshold value obtaining module 2 is used for obtaining a current core temperature threshold value according to the current charging power and the current SOC;
and the cooling control module 3 is configured to cool the battery when the current cell temperature is greater than the current cell temperature threshold.
In an alternative embodiment, the cooling control module 3 comprises:
a cooling threshold calculation unit, configured to calculate a cooling threshold according to the current core temperature threshold and a preset hysteresis temperature when the current core temperature is greater than the current core temperature threshold;
the first cooling control unit is used for continuing to cool the battery when the current cell temperature is smaller than the cooling threshold value;
and the second cooling control unit is used for finishing cooling the battery when the current cell temperature is greater than or equal to the cooling threshold value.
Further, the cooling control module 3 further includes:
and the third cooling control unit is used for determining that the battery is not cooled when the current cell temperature is less than or equal to the current cell temperature threshold.
In an optional embodiment, the cooling threshold calculation unit is configured to calculate a difference between the current core temperature threshold and the hysteresis temperature to obtain a cooling threshold.
In an alternative embodiment, the core temperature threshold value obtaining module 2 includes:
and the core temperature threshold query unit is used for acquiring the current core temperature threshold according to the current charging power and the current SOC through a preset battery core temperature threshold mapping relation.
In an optional embodiment, the battery core temperature threshold value mapping relation is a battery core temperature threshold value table; the value of the charging power in the battery core temperature threshold value table is changed in a step mode, and the value of the SOC in the battery core temperature threshold value table is changed at equal intervals.
It should be noted that the working principle and technical effect of the electric vehicle battery cooling control device according to the embodiment of the present invention are the same as those of the first embodiment, and are not repeated herein.
EXAMPLE III
Referring to fig. 4, a schematic diagram of a cooling control device for an electric vehicle battery according to an embodiment of the present invention is shown. The electric vehicle battery cooling control apparatus of this embodiment includes: a processor 11, a memory 15 and a computer program 151, such as an electric vehicle battery cooling control program, stored in said memory 15 and operable on said processor 11. The processor 11, when executing the computer program 151, implements the steps in the various electric vehicle battery cooling control method embodiments described above, such as the steps S11-S13 shown in fig. 1. Alternatively, the processor 11 implements the functions of the modules/units in the device embodiments described above when executing the computer program 151, such as an information detection module, a core temperature threshold value acquisition module, and a cooling control module.
Illustratively, the computer program 151 may be divided into one or more modules/units, which are stored in the memory 15 and executed by the processor 11 to accomplish the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution process of the computer program 151 in the electric vehicle battery cooling control apparatus. For example, the computer program 151 may be divided into an information detection module, a core temperature threshold acquisition module, and a cooling control module, and the specific functions of the modules are as follows: the information detection module is used for detecting the current charging power, the current SOC and the current cell temperature of the battery in real time when the battery starts to be charged; the core temperature threshold value obtaining module is used for obtaining a current core temperature threshold value according to the current charging power and the current SOC; and the cooling control module is used for cooling the battery when the current cell temperature is greater than the current cell temperature threshold.
The battery cooling control device of the electric automobile can be a desktop computer, a notebook computer, a palm computer, a cloud server and other computing devices. The electric vehicle battery cooling control device may include, but is not limited to, a processor 11, a memory 15. It will be understood by those skilled in the art that the schematic diagram is merely an example of an electric vehicle battery cooling control device, and does not constitute a limitation of an electric vehicle battery cooling control device, and may include more or fewer components than those shown, or some combination of components, or different components, for example, the electric vehicle battery cooling control device may further include a user interface 13 for accessing input and output devices, a network interface 14 for a network access device, a bus 12, etc.
The Processor 11 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, a discrete hardware component, etc. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like, the processor is a control center of the electric vehicle battery cooling control device, and various interfaces and lines are used for connecting various parts of the whole electric vehicle battery cooling control device.
The memory 15 may be used to store the computer program 151 and/or the module, and the processor 11 implements various functions of the electric vehicle battery cooling control apparatus by running or executing the computer program 151 and/or the module stored in the memory 15 and calling data stored in the memory 15. The memory 15 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 15 may include high speed random access memory 15, and may also include non-volatile memory 15, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one piece of disk storage 15, a Flash memory device, or other volatile solid state storage 15.
Wherein, the module/unit integrated with the battery cooling control device of the electric vehicle can be stored in a computer readable storage medium if the module/unit is realized in the form of a software functional unit and sold or used as a stand-alone product. Based on such understanding, all or part of the flow of the method according to the above embodiments may be implemented by a computer program 151 to instruct related hardware, where the computer program 151 may be stored in a computer readable storage medium, and when the computer program 151 is executed by the processor 11, the steps of the above methods may be implemented. Wherein said computer program 151 comprises computer program 151 code, said computer program 151 code may be in source code form, in object code form, in an executable file or in some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program 151 code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory 15, Read-Only Memory 15 (ROM), Random Access Memory 15 (RAM), electrical carrier signal, telecommunications signal, and software distribution medium, etc.
Example four
The embodiment of the invention provides a computer-readable storage medium, which comprises a stored computer program, wherein when the computer program runs, a device where the computer-readable storage medium is located is controlled to execute the method for controlling the cooling of the battery of the electric vehicle according to any one of the embodiments.
EXAMPLE five
An embodiment of the present invention provides a vehicle, including:
one or more processors;
a memory for storing one or more programs; when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the electric vehicle battery cooling control method according to any one of the embodiments.
It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple 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, in the drawings of the embodiment of the apparatus provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, and may be specifically implemented as one or more communication buses or signal lines. One of ordinary skill in the art can understand and implement it without inventive effort.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A method for controlling cooling of an electric vehicle battery is characterized by comprising the following steps:
when a battery starts to be charged, detecting the current charging power, the current SOC and the current cell temperature of the battery in real time;
obtaining a current core temperature threshold value according to the current charging power and the current SOC;
and when the current cell temperature is greater than the current cell temperature threshold, cooling the battery.
2. The method of claim 1, wherein the cooling the battery when the current cell temperature is greater than the current cell temperature threshold comprises:
when the current cell temperature is greater than the current cell temperature threshold, calculating a cooling threshold according to the current cell temperature threshold and a preset hysteresis temperature;
when the current cell temperature is lower than the cooling threshold value, continuing to cool the battery;
and when the current cell temperature is greater than or equal to the cooling threshold, finishing cooling the battery.
3. The method for controlling battery cooling of an electric vehicle according to claim 2, wherein calculating a cooling threshold value according to the current core temperature threshold value and a preset hysteresis temperature comprises:
and calculating the difference value between the current core temperature threshold value and the hysteresis temperature to obtain a cooling threshold value.
4. The electric vehicle battery cooling control method of claim 1, wherein the obtaining a current core temperature threshold value according to the current charging power and the current SOC comprises:
and acquiring a current core temperature threshold value according to the current charging power and the current SOC through a preset battery core temperature threshold value mapping relation.
5. The cooling control method for the battery of the electric automobile according to claim 4, characterized in that the battery core temperature threshold value mapping relation is a battery core temperature threshold value table; the value of the charging power in the battery core temperature threshold value table is changed in a step mode, and the value of the SOC in the battery core temperature threshold value table is changed at equal intervals.
6. The electric vehicle battery cooling control method of claim 1, further comprising:
and when the current cell temperature is less than or equal to the current cell temperature threshold, determining that the battery is not cooled.
7. An electric vehicle battery cooling control apparatus, comprising:
the information detection module is used for detecting the current charging power, the current SOC and the current cell temperature of the battery in real time when the battery starts to be charged;
the core temperature threshold value obtaining module is used for obtaining a current core temperature threshold value according to the current charging power and the current SOC;
and the cooling control module is used for cooling the battery when the current cell temperature is greater than the current cell temperature threshold.
8. An electric vehicle battery cooling control apparatus comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, the processor implementing the electric vehicle battery cooling control method of any one of claims 1 to 6 when executing the computer program.
9. A computer-readable storage medium, comprising a stored computer program, wherein when the computer program runs, the computer-readable storage medium controls an apparatus to execute the method according to any one of claims 1 to 6.
10. A vehicle, characterized by comprising:
one or more processors;
a memory for storing one or more programs; when executed by the one or more processors, cause the one or more processors to implement the electric vehicle battery cooling control method of any of claims 1-6.
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