CN113978311B - Battery temperature correction method and device and electronic equipment - Google Patents
Battery temperature correction method and device and electronic equipment Download PDFInfo
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- CN113978311B CN113978311B CN202111201095.XA CN202111201095A CN113978311B CN 113978311 B CN113978311 B CN 113978311B CN 202111201095 A CN202111201095 A CN 202111201095A CN 113978311 B CN113978311 B CN 113978311B
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- 238000012937 correction Methods 0.000 title claims abstract description 156
- 238000000034 method Methods 0.000 title claims abstract description 58
- 238000007599 discharging Methods 0.000 claims description 18
- 238000004590 computer program Methods 0.000 claims description 14
- 238000003860 storage Methods 0.000 claims description 9
- 238000013461 design Methods 0.000 description 13
- 230000008569 process Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 11
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 9
- 229910001416 lithium ion Inorganic materials 0.000 description 9
- 230000006870 function Effects 0.000 description 7
- 238000012545 processing Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
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- 206010034701 Peroneal nerve palsy Diseases 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000006386 memory function Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
-
- 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
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The application provides a battery temperature correction method, a device and an electronic device. According to the method, the corresponding temperature correction amount can be adjusted according to different running states of the battery, so that the accurate correction of the battery temperature under different working conditions is ensured, and the current actual temperature of the battery can be accurately determined.
Description
Technical Field
The present application relates to the field of temperature detection technologies, and in particular, to a method and an apparatus for correcting a battery temperature, and an electronic device.
Background
At present, new energy automobiles are developed in a large scale, and compared with other types of batteries such as lead-acid batteries, lithium ion batteries have the advantages of high energy density, high primary service life of a voltage platform and the like, and the lithium ion batteries become the first-choice energy storage device of the new energy automobiles. However, the problems of safety, cost and cycle performance of the lithium ion battery always restrict the market competitiveness of the new energy automobile.
The influence of temperature on the performance and safety of lithium ion batteries is always paid attention to. The optimum operating temperature of the lithium ion battery is in the range of 20-50 ℃, and the cycle life of the battery is reduced by 50% compared with the nominal cycle life every 10 ℃ of the operating temperature compared with the nominal temperature. On the one hand, the higher operating temperature can lead to thermal runaway of the lithium ion battery, causing the risks of fire, even explosion, and the like. On the other hand, lower temperatures can reduce the usable energy and power density of the battery. Therefore, the real-time control of the temperature of the power lithium ion battery is particularly important.
The real-time accurate collection of Battery monomer temperature is crucial to BMS (Battery MANAGEMENT SYSTEM ), so that NTC (Negative Temperature Coefficient, negative temperature coefficient) sensors are used for the collection of Battery monomer temperature currently, but the influence of self materials and a plurality of unavoidable resistance factors of the NTC sensors can generate failure conditions, various high-current and rapid charging and discharging working conditions are increased along with the increasing requirements of electric vehicles on performance, and the collection of Battery temperature by the NTC sensors is limited by the influences of the charging and discharging states and the heat dissipation conditions of lithium ion batteries, so that the accurate temperature of each lithium ion Battery monomer cannot be accurately reacted.
Disclosure of Invention
The application provides a temperature correction method, a temperature correction device and electronic equipment, which are used for respectively and accurately correcting and compensating the temperature in a battery charging state and a battery discharging state.
In a first aspect, an embodiment of the present application provides a method for correcting a battery temperature, including:
when the current temperature value of the battery is acquired, determining the current running state of the battery, wherein the running state is a battery charging state or a battery discharging state;
determining a temperature correction amount corresponding to the operating state;
and carrying out temperature correction on the current temperature value according to the temperature correction quantity to obtain the actual temperature of the battery.
In the method, firstly, a temperature correction amount is determined according to the running state of the battery, wherein the running state is a battery charging state or a battery discharging state, the temperature correction amounts corresponding to the states are different, and finally, the acquired current temperature value is corrected according to the temperature correction amount. According to the method, the corresponding temperature correction amount can be adjusted according to different running states of the battery, so that the accurate correction of the battery temperature under different working conditions is ensured, and the current actual temperature of the battery can be accurately determined.
In one possible design, before determining the current operating state of the battery, the method further comprises:
Acquiring a first average temperature value of a historical acquisition temperature of the battery in a charging state, and acquiring second average temperature values of a plurality of batteries adjacent to the battery;
obtaining a temperature correction amount in a charging state according to the first average temperature value, the second average temperature value and the reference temperature value; and
Acquiring a third average temperature value of the historical acquisition temperature of the battery in a discharging state, and acquiring a fourth average temperature value of a plurality of batteries adjacent to the battery;
And obtaining the temperature correction quantity in the discharge state according to the third average temperature value, the fourth average temperature value and the reference temperature value.
In one possible design, the obtaining the temperature correction amount of the charging state according to the first average temperature value, the second average temperature value and the reference temperature value includes:
taking an average value of the difference between the first average temperature value and the reference temperature value as a first charge temperature correction amount;
taking an average value of the difference between the second average temperature value and the reference temperature value as a second charge temperature correction amount;
and taking the sum of the first charge temperature correction amount and the second charge temperature correction amount as the temperature correction amount in the battery charge state.
In one possible design, the obtaining the temperature correction amount in the discharge state according to the third average temperature value, the fourth average temperature value and the reference temperature value includes:
taking an average value of the difference between the third average temperature value and the reference temperature value as a first discharge temperature correction amount;
taking an average value of the difference between the fourth average temperature value and the reference temperature value as a second discharge temperature correction amount;
And taking the sum of the first discharge temperature correction amount and the second discharge temperature correction amount as the temperature correction amount in the battery charging state.
In one possible design, before obtaining the first average temperature value of the historical collection temperature of the battery in the charged state, the method further includes:
Detecting whether a fault exists in a temperature sensor corresponding to the battery;
If yes, taking a temperature value acquired by the temperature sensor at a moment before the fault as a reference temperature value;
if not, taking the temperature value currently acquired by the temperature sensor as a reference temperature value.
In one possible design, performing temperature correction on the current temperature value according to the temperature correction amount to obtain an actual temperature of the battery includes:
Determining a temperature correction coefficient corresponding to the battery according to a state parameter of the battery, wherein the state parameter at least comprises the service time of the battery;
And obtaining a product result between the temperature correction amount and the temperature correction coefficient, and taking the sum of the product result and the current temperature as the actual temperature of the battery.
In one possible design, after obtaining the actual temperature of the battery, the method further comprises:
and storing the actual temperature of the battery into a history database corresponding to the running state.
In a second aspect, an embodiment of the present application provides a battery temperature correction device, including:
the determining unit is used for determining the current running state of the battery when the current temperature value of the battery is acquired, wherein the running state is a battery charging state or a battery discharging state;
A temperature correction unit for determining a temperature correction amount corresponding to the operation state; and carrying out temperature correction on the current temperature value according to the temperature correction quantity to obtain the actual temperature of the battery.
In a third aspect, an embodiment of the present application provides an electronic device, including:
A memory for storing a computer program;
And the processor is used for realizing the steps of the battery temperature correction method when executing the computer program stored in the memory.
In a fourth aspect, embodiments of the present application provide a computer readable storage medium, in which a computer program is stored, the computer program implementing the steps of the above-described battery temperature correction method when executed by a processor.
The technical effects of each of the second to fourth aspects and the technical effects that may be achieved by each aspect are referred to above for the technical effects that may be achieved by the first aspect or each possible aspect in the first aspect, and the detailed description is not repeated here.
Drawings
FIG. 1 is a physical structure diagram of the current battery temperature acquisition provided by the application;
FIG. 2 is a flow chart of a battery temperature correction method according to the present application;
fig. 3 is a schematic structural diagram of a battery temperature correction device according to the present application;
Fig. 4 is a schematic structural diagram of an electronic device according to the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings. The specific method of operation in the method embodiment may also be applied to the device embodiment or the system embodiment. In the description of the present application, "a plurality of" means "at least two". "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. A is connected with B, and can be represented as follows: both cases of direct connection of A and B and connection of A and B through C. In addition, in the description of the present application, the words "first," "second," and the like are used merely for distinguishing between the descriptions and not be construed as indicating or implying a relative importance or order.
Currently, for battery temperature measurement in a new energy automobile, mainly or directly adopting an NTC sensor acquisition mode, the NTC sensor has good measurement accuracy, as shown in fig. 1, which is a physical structure diagram of current battery temperature acquisition, and since the battery is a matrix structure composed of one single body, the NTC sensor is also arranged into a matrix structure, as shown in fig. 1, NTC 1-1 to NTC 1-N are the number of single bodies contained in a battery pack module, and the battery pack has N modules in total. Each single cell in the battery system can be subjected to temperature acquisition through the structure shown in fig. 1, but due to the inherent characteristics of the material of the NTC sensor, failure can occur under certain high temperature conditions and certain specific use conditions, so that the acquisition accuracy of the battery temperature is reduced, and the accurate acquisition of the battery temperature cannot be ensured.
In order to solve the above problems, the present application provides a method for correcting a battery temperature, in which a temperature correction amount is determined according to an operating state of a battery, the operating state is a battery charging state or a battery discharging state, the temperature correction amounts corresponding to the respective states are different, and finally, an acquired current temperature value is corrected according to the temperature correction amount. Therefore, the accurate correction of the battery temperature under different working conditions is ensured, and the current actual temperature of the battery can be accurately determined.
Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
As shown in fig. 2, the method for correcting the battery temperature according to the embodiment of the present application can accurately determine the current actual temperature of the battery, and specifically includes the following implementation procedures:
S1, when a current temperature value of a battery is acquired, determining the current running state of the battery;
s2, determining a temperature correction amount corresponding to the running state;
and S3, carrying out temperature correction on the current temperature value according to the temperature correction quantity to obtain the actual temperature of the battery.
The technical scheme of the application is described in detail through the specific description.
First, in the embodiment of the present application, in order to accurately determine the actual temperature value of the battery, it is necessary to determine the temperature correction amounts of the battery in various operating states, that is, the temperature correction amounts in the charged state and the temperature correction amounts in the discharged state, before the temperature value of the battery is corrected.
Here, in the following embodiments, the temperature correction process of a single battery will be described, and the temperature correction process of other batteries corresponds to the temperature correction process of the battery.
The battery is charged with large current in the charging process, so that the temperature change speed of the battery is high, and the battery is discharged with small current in the discharging process, so that the temperature change of the battery is low, and the corresponding temperature correction amounts need to be determined respectively in different states of the battery.
In the embodiment of the present application, the temperature correction amount in the charged state may be determined by:
the temperature value, namely the historical collection temperature, of the battery in the charging state collected by the battery in each collection period is stored in a charging historical database, and a first average temperature value of the historical collection temperature of the battery in the charging state is obtained. In addition, the system will also obtain the average temperature value of a plurality of batteries adjacent to the battery, namely: and a second average temperature value. And obtaining the temperature correction quantity in the charging state according to the first average temperature value, the second average temperature value and the reference temperature.
Specifically, an average value of the difference between the first average temperature value and the reference temperature value is taken as a first charge temperature correction amount; and taking the average value of the difference between the second average temperature value and the reference temperature value as a second charging temperature correction amount, and finally taking the sum of the first charging temperature correction amount and the second charging temperature correction amount as the temperature correction amount of the battery in the charging state.
For example, the historical temperature values collected by the battery cells during the last 1000 charges are averaged to obtain T h, i.e.: a first average temperature value, a first charge temperature correction amount ofTr is the reference temperature value. The second charge temperature correction amount obtains a T av according to the average value of a plurality of adjacent batteries of the battery according to the structure according to the consistency principle of temperature distribution, namely: a second average temperature value, a second charge temperature correction amount/>Finally, the temperature correction amount tc=ta1+ta2 of the battery in the charged state can be obtained.
In the embodiment of the present application, the temperature correction amount in the discharge state may be determined by:
The temperature value, namely the historical collection temperature, of the battery collected in each collection period under the discharge state is stored in a discharge historical database, and a third average temperature value of the historical collection temperature of the battery under the discharge state is obtained. In addition, the system will also obtain the average temperature value of a plurality of batteries adjacent to the battery, namely: fourth average temperature value. And obtaining the temperature correction quantity in the discharge state according to the third average temperature value, the fourth average temperature value and the reference temperature.
Specifically, an average value of the difference between the third average temperature value and the reference temperature value is taken as a first discharge temperature correction amount; and taking the average value of the difference between the fourth average temperature value and the reference temperature value as a second discharge temperature correction amount, and finally taking the sum of the first discharge temperature correction amount and the second discharge temperature correction amount as the temperature correction amount of the battery in a discharge state.
For example, the historical temperature values collected by the battery cells during the last 1000 discharges are averaged to obtain T M, i.e.: a third average temperature value, a first discharge temperature correction amount ofTr is the reference temperature value. The second charge temperature correction amount obtains a T bv according to the average value of a plurality of adjacent batteries of the battery according to the structure according to the consistency principle of temperature distribution, namely: a second average temperature value, a second charge temperature correction amount/>Eventually, the temperature correction amount ts=tb1+tb2 of the battery in the charged state can be obtained.
In this way, the temperature correction amount of the battery in the charged state and the temperature correction amount in the discharged state can be obtained, respectively. Therefore, after the NTC sensor collects the current temperature value, the current temperature can be corrected through the temperature correction amount to obtain the actual temperature of the battery, and further, the accurate correction of the battery temperature under different working conditions is ensured, and the current actual temperature of the battery can be accurately determined.
Further, in the embodiment of the present application, in order to accurately obtain the reference temperature of the battery, the reference temperature is determined based on whether the temperature sensor has a fault, specifically, whether the system detects the fault of the temperature sensor, where the fault detection may be one or a combination of the following three implementations:
Mode one: when any signal of the NTC sensor is not detected within a preset time period, judging that the NTC sensor fails;
Mode two: judging whether the temperature value detected by the NTC sensor is unchanged within a preset time, if the temperature value is unchanged, acquiring the temperature values of other NTC sensors adjacent to the NTC sensor, judging whether the temperature difference between the NTC sensor and the adjacent NTC sensor exceeds a preset threshold value, if not, judging that the NTC sensor is not faulty, and if so, judging that the NTC sensor is faulty.
Mode three: detecting whether the temperature value acquired by the NTC sensor exceeds a preset threshold value in a preset time period, and if not, judging that the detection can be carried out by using other fault detection modes continuously; if not, the NTC sensor is judged to be faulty.
By the method, whether the current NTC sensor fails or not can be accurately determined, and if the NTC sensor fails, the temperature value acquired at a moment before the NTC sensor fails is used as a reference temperature value. If the NTC sensor is not in fault, taking the temperature value currently acquired by the NTC sensor as a reference temperature value.
In an alternative embodiment, the temperature detection accuracy of the NTC sensor is gradually reduced with the extension of the service time of the NTC sensor during actual use, so that in the present application, a temperature correction coefficient is set, the temperature correction coefficient gradually increases with the service time of the NTC sensor, the value of the temperature correction coefficient is 0 during initial use of the NTC sensor, and the temperature correction coefficient is 1 when the NTC sensor fails.
Therefore, when temperature compensation is performed, a temperature correction coefficient corresponding to the battery can be determined according to a state parameter of the battery, where the battery parameter can include a service time of the battery and/or a service time of the NTC sensor. And obtaining a product result between the temperature correction quantity and the temperature correction coefficient, and taking the sum of the product result and the current temperature as the time temperature of the battery. Specifically, the method can be obtained by the following correction formula:
Tf＝Tr+α*(Ta1+Ta2)
wherein T f is the actual temperature of the battery in a charged state, and alpha is a temperature correction coefficient.
The method can effectively take the temperature acquired by the NTC sensor as the reference temperature, fully considers the influence of factors such as current magnitude, service time and the like of the battery in the charging and discharging processes, and finally corrects the temperature correction amount by real-time change of the temperature correction coefficient calibrated under different working conditions, thereby maximally ensuring the accuracy and reliability of the temperature correction amount in the charging and discharging processes of the battery.
Corresponding to the method provided by the present application, the embodiment of the present application further provides a battery temperature correction device, as shown in fig. 3, which is a schematic structural diagram of a temperature correction device in the embodiment of the present application, where the device includes:
a determining unit 301, configured to determine, when a current temperature value of a battery is acquired, a current running state of the battery, where the running state is a battery charging state or a battery discharging state;
a temperature correction unit 302 for determining a temperature correction amount corresponding to the operation state; and carrying out temperature correction on the current temperature value according to the temperature correction quantity to obtain the actual temperature of the battery.
In one possible design, the temperature correction unit 302 is specifically configured to obtain a first average temperature value of a historical collected temperature of the battery in a charged state, and obtain a second average temperature value of a plurality of batteries adjacent to the battery;
obtaining a temperature correction amount in a charging state according to the first average temperature value, the second average temperature value and the reference temperature value; and
Acquiring a third average temperature value of the historical acquisition temperature of the battery in a discharging state, and acquiring a fourth average temperature value of a plurality of batteries adjacent to the battery;
And obtaining the temperature correction quantity in the discharge state according to the third average temperature value, the fourth average temperature value and the reference temperature value.
In one possible design, the temperature correction unit 302 is specifically configured to take an average value of the differences between the first average temperature value and the reference temperature value as a first charging temperature correction amount;
taking an average value of the difference between the second average temperature value and the reference temperature value as a second charge temperature correction amount;
and taking the sum of the first charge temperature correction amount and the second charge temperature correction amount as the temperature correction amount in the battery charge state.
In one possible design, the temperature correction unit 302 is specifically configured to take an average value of the differences between the third average temperature value and the reference temperature value as a first discharge temperature correction amount;
taking an average value of the difference between the fourth average temperature value and the reference temperature value as a second discharge temperature correction amount;
And taking the sum of the first discharge temperature correction amount and the second discharge temperature correction amount as the temperature correction amount in the battery charging state.
In one possible design, the temperature correction unit 302 is further configured to detect whether a fault exists in a temperature sensor corresponding to the battery;
If yes, taking a temperature value acquired by the temperature sensor at a moment before the fault as a reference temperature value;
if not, taking the temperature value currently acquired by the temperature sensor as a reference temperature value.
In one possible design, the temperature correction unit 302 is specifically configured to determine a temperature correction coefficient corresponding to the battery according to a state parameter of the battery, where the state parameter includes at least a service time of the battery;
And obtaining a product result between the temperature correction amount and the temperature correction coefficient, and taking the sum of the product result and the current temperature as the actual temperature of the battery.
The battery temperature correction device can effectively take the temperature collected by the NTC sensor as the reference temperature, fully considers the influence of factors such as current and service time on the battery in the charging and discharging process, and finally corrects the temperature correction amount by real-time change of the temperature correction coefficient calibrated under different working conditions, thereby maximally ensuring the accuracy and reliability of the temperature correction amount in the charging and discharging process of the battery.
Based on the same inventive concept, the embodiment of the present application further provides an electronic device, where the electronic device may implement the function of the foregoing battery temperature correction device, and referring to fig. 4, the electronic device includes:
At least one processor 401, and a memory 402 connected to the at least one processor 401, in which the specific connection medium between the processor 401 and the memory 402 is not limited in the embodiment of the present application, and in fig. 4, the connection between the processor 401 and the memory 402 through the bus 400 is taken as an example. The bus 400 is shown in bold lines in fig. 4, and the manner in which the other components are connected is illustrated schematically and not by way of limitation. The bus 400 may be divided into an address bus, a data bus, a control bus, etc., and is represented by only one thick line in fig. 4 for ease of illustration, but does not represent only one bus or one type of bus. Or processor 401 may also be referred to as a controller, without limitation of the name.
In the embodiment of the present application, the memory 402 stores instructions executable by the at least one processor 401, and the at least one processor 401 may execute the above-described output method of the foothold region by executing the instructions stored in the memory 402. Processor 401 may implement the functions of the various modules in the apparatus shown in fig. 3.
The processor 401 is a control center of the apparatus, and various interfaces and lines can be used to connect various parts of the entire control device, and by executing or executing instructions stored in the memory 402 and invoking data stored in the memory 402, various functions of the apparatus and processing data can be performed, so that the apparatus is monitored as a whole.
In one possible design, processor 401 may include one or more processing units, and processor 401 may integrate an application processor and a modem processor, wherein the application processor primarily processes operating systems, user interfaces, application programs, and the like, and the modem processor primarily processes wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 401. In some embodiments, processor 401 and memory 402 may be implemented on the same chip, and in some embodiments they may be implemented separately on separate chips.
The processor 401 may be a general purpose processor such as a Central Processing Unit (CPU), digital signal processor, application specific integrated circuit, field programmable gate array or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, which may implement or perform the methods, steps and logic blocks disclosed in the embodiments of the present application. The general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the output method of the foot drop area disclosed in the embodiment of the application can be directly embodied as the execution completion of a hardware processor or the execution completion of the combination execution of hardware and software modules in the processor.
Memory 402 is a non-volatile computer-readable storage medium that can be used to store non-volatile software programs, non-volatile computer-executable programs, and modules. The Memory 402 may include at least one type of storage medium, which may include, for example, flash Memory, hard disk, multimedia card, card Memory, random access Memory (Random Access Memory, RAM), static random access Memory (Static Random Access Memory, SRAM), programmable Read-Only Memory (Programmable Read Only Memory, PROM), read-Only Memory (ROM), charged erasable programmable Read-Only Memory (ELECTRICALLY ERASABLE PROGRAMMABLE READ-Only Memory, EEPROM), magnetic Memory, magnetic disk, optical disk, and the like. Memory 402 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory 402 in embodiments of the present application may also be circuitry or any other device capable of performing memory functions for storing program instructions and/or data.
By programming the processor 401, the code corresponding to the battery temperature correction method described in the foregoing embodiment may be cured into the chip, so that the chip can execute the steps of the battery temperature correction method of the embodiment shown in fig. 2 at the time of operation. How to design and program the processor 401 is a technology well known to those skilled in the art, and will not be described in detail here.
Based on the same inventive concept, the embodiments of the present application also provide a storage medium storing computer instructions that, when run on a computer, cause the computer to perform the battery temperature correction method as previously discussed.
In some possible embodiments, aspects of the battery temperature correction method provided by the present application may also be implemented in the form of a program product comprising program code for causing the control apparatus to carry out the steps of the battery temperature correction method according to the various exemplary embodiments of the present application as described in the present specification when the program product is run on a device.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (9)
1. A battery temperature correction method, the method comprising:
when the current temperature value of the battery is acquired, determining the current running state of the battery, wherein the running state is a battery charging state or a battery discharging state;
determining a temperature correction amount corresponding to the operating state;
Determining a temperature correction coefficient corresponding to the battery according to a state parameter of the battery, wherein the state parameter at least comprises the service time of the battery;
And obtaining a product result between the temperature correction amount and the temperature correction coefficient, and taking the sum of the product result and the current temperature as the actual temperature of the battery.
2. The method of claim 1, wherein prior to determining the current operating state of the battery, the method further comprises:
Acquiring a first average temperature value of a historical acquisition temperature of the battery in a charging state, and acquiring second average temperature values of a plurality of batteries adjacent to the battery;
obtaining a temperature correction amount in a charging state according to the first average temperature value, the second average temperature value and the reference temperature value; and
Acquiring a third average temperature value of the historical acquisition temperature of the battery in a discharging state, and acquiring a fourth average temperature value of a plurality of batteries adjacent to the battery;
And obtaining the temperature correction quantity in the discharge state according to the third average temperature value, the fourth average temperature value and the reference temperature value.
3. The method of claim 2, wherein deriving the temperature correction of the state of charge based on the first average temperature value, the second average temperature value, and a reference temperature value comprises:
taking an average value of the difference between the first average temperature value and the reference temperature value as a first charge temperature correction amount;
taking an average value of the difference between the second average temperature value and the reference temperature value as a second charge temperature correction amount;
and taking the sum of the first charge temperature correction amount and the second charge temperature correction amount as the temperature correction amount in the battery charge state.
4. The method of claim 2, wherein deriving the temperature correction in the discharge state based on the third average temperature value, the fourth average temperature value, and the reference temperature value comprises:
taking an average value of the difference between the third average temperature value and the reference temperature value as a first discharge temperature correction amount;
taking an average value of the difference between the fourth average temperature value and the reference temperature value as a second discharge temperature correction amount;
And taking the sum of the first discharge temperature correction amount and the second discharge temperature correction amount as the temperature correction amount in the battery charging state.
5. The method of claim 2, wherein prior to obtaining the first average temperature value of the historical acquisition temperature of the battery in the charged state, the method further comprises:
Detecting whether a fault exists in a temperature sensor corresponding to the battery;
If yes, taking a temperature value acquired by the temperature sensor at a moment before the fault as a reference temperature value;
if not, taking the temperature value currently acquired by the temperature sensor as a reference temperature value.
6. The method of claim 1, wherein after obtaining the actual temperature of the battery, the method further comprises:
and storing the actual temperature of the battery into a history database corresponding to the running state.
7. A battery temperature correction device, characterized in that the device comprises:
the determining unit is used for determining the current running state of the battery when the current temperature value of the battery is acquired, wherein the running state is a battery charging state or a battery discharging state;
The temperature correction unit is used for determining a temperature correction amount corresponding to the running state and determining a temperature correction coefficient corresponding to the battery according to the state parameter of the battery; and obtaining a product result between the temperature correction amount and the temperature correction coefficient, and taking the sum of the product result and the current temperature as the actual temperature of the battery, wherein the state parameter at least comprises the service time of the battery.
8. An electronic device, comprising:
A memory for storing a computer program;
a processor for carrying out the method steps of any one of claims 1-6 when executing a computer program stored on said memory.
9. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored therein a computer program which, when executed by a processor, implements the method steps of any of claims 1-6.
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