CN116224124A - Battery attenuation identification method, device, medium and electronic equipment - Google Patents
Battery attenuation identification method, device, medium and electronic equipment Download PDFInfo
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Abstract
The application provides a battery attenuation identification method, a device, a medium and electronic equipment. The battery attenuation identification method comprises the following steps: acquiring battery data at a plurality of moments, wherein the battery data comprise voltage and temperature; acquiring an identification slope based on a temperature change value corresponding to the voltage and the voltage, wherein the temperature change value is a change value of the temperature at different moments; and acquiring attenuation information of the battery based on the identification slope and the reference slope. Because the identification of the battery attenuation can be realized only by acquiring the battery data at a plurality of moments, the battery attenuation identification method has relatively less data for identification and relatively less occupied hardware resources. And the data processing process in the battery attenuation identification method is simple, so the battery attenuation identification method can improve the identification efficiency of battery attenuation.
Description
Technical Field
The application belongs to the field of batteries, and relates to an identification method, in particular to a battery attenuation identification method, a device, a medium and electronic equipment.
Background
In recent years, with the development of new energy fields, lithium batteries are widely used as power sources in the fields of electric automobiles and the like. In the application process of the lithium battery, the battery cannot release maximum energy due to the possible attenuation process of the battery, and safety accidents such as heating and explosion can be caused, so that the attenuation degree of the battery needs to be identified. The current battery attenuation identification method has the problem of low identification efficiency because of the large amount of required data and complex identification process.
Disclosure of Invention
The invention aims to provide a battery attenuation identification method, a device, a medium and electronic equipment, which are used for solving the problem of low efficiency of the battery attenuation identification method in the prior art.
In a first aspect, the present application provides a battery degradation identification method, including: acquiring battery data at a plurality of moments, wherein the battery data comprise voltage and temperature; acquiring an identification slope based on a temperature change value corresponding to the voltage and the voltage, wherein the temperature change value is a change value of the temperature at different moments; and acquiring attenuation information of the battery based on the identification slope and the reference slope.
The identification of the battery attenuation can be realized by only acquiring the battery data at a plurality of moments, so that the battery attenuation identification method has less data for identification and relatively occupies less hardware resources. And the data processing process in the battery attenuation identification method is simple, so the battery attenuation identification method can improve the identification efficiency of battery attenuation. In addition, the temperature is easy to collect, so that the battery attenuation identification method has a very wide application range.
In an embodiment of the present application, based on the temperature change value corresponding to the voltage and the voltage, a sub-data set of the battery data is obtained, where the temperature change value in the sub-data set is a temperature change value ranging from a maximum value of the temperature change value corresponding to the voltage to a minimum value of the temperature change value corresponding to the voltage, or from a minimum value of the temperature change value corresponding to the voltage to a maximum value of the temperature change value corresponding to the voltage; and acquiring the identification slope based on the sub-data set.
In an embodiment of the present application, the temperature change value in the sub-data set is expressed as:
δT＝k 1 ×U+k 0
wherein δT represents a temperature change value in the sub-data set, U represents a voltage corresponding to the temperature change value in the sub-data set, and k 1 Representing the identified slope, k 0 Representing the recognition intercept.
In an embodiment of the present application, the implementation method for obtaining the attenuation information of the battery includes: acquiring a slope ratio of the identified slope to the reference slope based on the identified slope and the reference slope; and acquiring attenuation information of the battery based on the slope ratio.
In an embodiment of the present application, the attenuation information of the battery is expressed as:
wherein ,k1 (Si) Representing the identified slope, k 1 (S1) Represents the reference slope, D k (Si) Representing the slope ratio.
In an embodiment of the present application, the implementation method for obtaining the attenuation information of the battery based on the slope ratio includes: and acquiring attenuation information of the battery based on a section range in which the slope ratio is positioned, wherein a mapping between the section range and the attenuation information is acquired according to battery data of the same type of battery in actual operation and attenuation information of the same type of battery in actual operation.
In an embodiment of the present application, when the battery data includes the same voltage, the implementation method for obtaining the battery data at several moments includes: and screening the same voltages to obtain the last collected voltage or the first collected voltage in the same voltages.
In a second aspect, the present application provides a battery decay identification apparatus, the battery decay identification apparatus comprising: the battery data acquisition module is used for acquiring battery data at a plurality of moments, wherein the battery data comprise voltage and temperature; the identification slope obtaining module is used for obtaining an identification slope based on a temperature change value corresponding to the voltage and the voltage, wherein the temperature change value is a change value of the temperature at different moments; and the attenuation information acquisition module is used for acquiring the attenuation information of the battery based on the identification slope and the reference slope.
In a third aspect, the present application provides a computer-readable storage medium having stored thereon a computer program, characterized in that: the computer program, when executed by a processor, implements the battery degradation identification method according to any one of the first aspects.
In a fourth aspect, the present application provides an electronic device, including: a memory storing a computer program; the processor is in communication connection with the memory, and executes the battery attenuation identification method according to any one of the first aspect of the application when the computer program is called; and the display is in communication connection with the processor and the memory and is used for displaying a related GUI interactive interface of the battery attenuation identification method.
As described above, the battery attenuation identification method, device, medium and electronic equipment have the following beneficial effects:
the identification of the battery attenuation can be realized by only acquiring the battery data at a plurality of moments, so that the battery attenuation identification method has less data for identification and relatively occupies less hardware resources. And the data processing process in the battery attenuation identification method is simple, so the battery attenuation identification method can improve the identification efficiency of battery attenuation. In addition, the temperature is easy to collect, so that the battery attenuation identification method has a very wide application range.
Drawings
Fig. 1 is a schematic view of a vehicle according to an embodiment of the present application.
Fig. 2 is a flowchart of a battery degradation identification method according to an embodiment of the present application.
FIG. 3 is a flowchart illustrating a method for obtaining a recognition slope according to an embodiment of the present application.
Fig. 4 is a schematic diagram of a sub-data set according to an embodiment of the present application.
Fig. 5 is a schematic diagram illustrating a straight line of recognition according to an embodiment of the present application.
Fig. 6 is a flowchart of an implementation method for obtaining attenuation information of a battery according to an embodiment of the present application.
Fig. 7 is a schematic structural diagram of a battery attenuation identifying device according to an embodiment of the present application.
Description of element reference numerals
10. Vehicle with a vehicle body having a vehicle body support
110. Power module
120. Acquisition module
130. Attenuation identification module
140. Battery pack
700. Battery attenuation identification device
710. Battery data acquisition module
720. Identification slope obtaining module
730. Attenuation information acquisition module
S11-S13 step
S21-S22 step
S31-S32 step
Detailed Description
Other advantages and effects of the present application will become apparent to those skilled in the art from the present disclosure, when the following description of the embodiments is taken in conjunction with the accompanying drawings. The present application may be embodied or carried out in other specific embodiments, and the details of the present application may be modified or changed from various points of view and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.
It should be noted that, the illustrations provided in the following embodiments merely illustrate the basic concepts of the application by way of illustration, and only the components related to the application are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complex.
The following describes the technical solutions in the embodiments of the present application in detail with reference to the drawings in the embodiments of the present application.
As shown in fig. 1, the present embodiment provides a schematic application of the battery degradation identification method in a vehicle 10. The vehicle 10 includes: the power module 110 is electrically connected with the collection module 120, the attenuation identification module 130 and the battery pack 140, the power module 110 may include an engine, a motor, a transmission and other power devices in the vehicle 10 for enabling the vehicle to work normally, the collection module 120 may be used for collecting battery data of the battery pack 140, the collection module 120 may be implemented by a battery management system, which is not described herein, and the attenuation identification module 120 is used for identifying attenuation of the battery pack 130 based on the battery data collected by the collection module 120, so as to obtain attenuation information of the battery pack 130, and further improve safety of the vehicle 10. The function of the attenuation identifying module 120 may be implemented on a driving computer of the vehicle 10.
As shown in fig. 2, the present embodiment provides a battery attenuation identifying method, which may be implemented by a processor of a computer device, and includes:
and S11, acquiring battery data at a plurality of moments, wherein the battery data comprise voltage and temperature.
Optionally, when the battery data contains the same voltage, one implementation method for acquiring the battery data at several moments includes: and screening the same voltages to obtain the last collected voltage in the same voltages. For example, the battery data includes a voltage 3.3V and a temperature 36.0 ℃ at a sampling time of 1s, a voltage 3.3V and a temperature 36.2 ℃ at a sampling time of 2s, and a voltage 3.3V and a temperature 36.4 ℃ at a sampling time of 5s, and the battery data only retains a voltage 3.3V and a temperature 36.4 ℃ at a sampling time of 5 s.
Optionally, when the battery data contains the same voltage, another implementation method for acquiring the battery data at several moments includes: and screening the same voltages to obtain the voltage which is acquired first in the same voltages. For example, the battery data includes a voltage 3.3V and a temperature 36.0 ℃ at a sampling time of 1s, a voltage 3.3V and a temperature 36.2 ℃ at a sampling time of 2s, and a voltage 3.3V and a temperature 36.4 ℃ at a sampling time of 5s, and the battery data only retains the voltage 3.3V and the temperature 36.0 ℃ at the sampling time of 1 s.
Alternatively, the voltage may be an actual operating voltage of the battery during operation, and the temperature may be an actual operating temperature of the battery during operation. The temperature may be the temperature of the battery during any phase of operation, and need not be sampled only for the battery during a fixed phase of operation, e.g., the temperature may not be the temperature of the battery during a full charge or full discharge phase of operation. The temperature sampling has higher flexibility, so the battery attenuation identification method can be suitable for various application scenes of the battery. And because the battery is charged or discharged fully in the process of charging and discharging, the battery safety is adversely affected, and the working stage of the battery in the process of fully charging or discharging can be completely avoided in the temperature sampling process, the safety of the battery attenuation identification method can be improved.
Optionally, the battery data may be battery data in an electric vehicle or battery data of a power station, and the implementation method for obtaining the battery data at a plurality of moments includes: the battery data is acquired in real time by an acquisition module, which may be a BMS (Battery Management System ).
Optionally, the battery data may be battery data in an electric vehicle or battery data of a power station, and the implementation method for obtaining the battery data at a plurality of moments includes: and acquiring the read data of the battery management system in real time, wherein the read data of the battery management system is the battery data output by the battery sampling chip read by the battery management system in real time.
Alternatively, the read data of the battery management system may be multi-daisy-chain rotation read the battery data output by the battery sampling chip, and by multi-daisy-chain rotation reading the battery data output by the battery sampling chip, the communication pressure of the single daisy-chain can be reduced when the battery data is too much.
S12, acquiring an identification slope based on a temperature change value corresponding to the voltage and the voltage, wherein the temperature change value is a change value of the temperature at different moments.
Alternatively, the voltage has a corresponding temperature and a corresponding temperature variation value, the temperature corresponding to the voltage may be the temperature at the same sampling time as the voltage, the temperature variation value corresponding to the voltage may be the temperature variation value corresponding to the voltage at the previous sampling time of the voltage, for example, the voltage 3.1V and the temperature 36.1 ℃ at the sampling time t=1.5 s, the voltage 3.1V is the voltage corresponding to 36.1 ℃, the voltage 3.2V and the temperature 36.2 ℃ at the time t=2 s, the battery voltage 3.4V at the time t=2.5 s, the battery temperature 36.4 ℃ at the time t=2.5 s, the temperature variation value corresponding to the voltage 3.2V is 0.1 ℃, and the temperature variation value corresponding to the voltage 3.4V is 0.2 ℃.
Alternatively, the identification slope may be a constant value, and the identification slope is used to identify the degree of degradation of the battery.
Optionally, the temperature change value corresponding to the voltage and the voltage may be in a form of a key value pair, a key of the key value pair may be the voltage, and a value of the key value pair may be the temperature change value corresponding to the voltage, and the implementation method for obtaining the identification slope includes: acquiring a voltage and a key value pair of the voltage corresponding to the temperature change value based on the temperature change value corresponding to the voltage and the voltage; and acquiring the identification slope based on the key value pair. The key value pair may be, for example, (3.1 v,0.1 ℃) and (3.2 v,0.2 ℃) and the like, and the temperature change value corresponding to the voltage and the data storage and data processing of the voltage can be facilitated by acquiring the identification slope based on the key value pair. Similarly, the voltage and the temperature value corresponding to the voltage may also be in the form of a key value pair, which is not described herein.
S13, acquiring attenuation information of the battery based on the identification slope and the reference slope.
Optionally, the reference slope may be the identification slope of the battery under different cycle numbers, for example, the identification slope is used to identify attenuation information of the battery under 500 cycle numbers, the reference slope may be the identification slope of the battery under 300 cycle numbers or the identification slope under 400 cycle numbers, etc., and the embodiment does not explicitly limit the reference slope, and may be flexibly set according to actual scene requirements.
Alternatively, the attenuation information may be any one of the following: severe attenuation, occurrence of attenuation and non-attenuation.
As can be seen from the above description, the battery decay identification method includes: acquiring battery data at a plurality of moments, wherein the battery data comprise voltage and temperature; acquiring an identification slope based on a temperature change value corresponding to the voltage and the voltage, wherein the temperature change value is a change value of the temperature at different moments; and acquiring attenuation information of the battery based on the identification slope and the reference slope.
The identification of the battery attenuation can be realized by only acquiring the battery data at a plurality of moments, so that the battery attenuation identification method has less data for identification and relatively occupies less hardware resources. And the data processing process in the battery attenuation identification method is simple, so the battery attenuation identification method can improve the identification efficiency of battery attenuation. In addition, the temperature is easy to collect, so that the battery attenuation identification method has a very wide application range.
In addition, the battery attenuation identification method does not need additional testing conditions and testing equipment, and the battery data can also be the data of full charge or full discharge of the battery in a fixed stage, so that the battery attenuation identification method can be directly used in an actual scene.
As shown in fig. 3, the present embodiment provides a method for obtaining an identification slope, which includes:
and S21, acquiring a sub-data set of the battery data based on the temperature change value corresponding to the voltage and the voltage, wherein the temperature change value in the sub-data set is a temperature change value ranging from the maximum value of the temperature change value corresponding to the voltage to the minimum value of the temperature change value corresponding to the voltage, or from the minimum value of the temperature change value corresponding to the voltage to the maximum value of the temperature change value corresponding to the voltage.
Preferably, in the changing process of the temperature change value corresponding to the voltage, two or more maximum values of the temperature change value corresponding to the voltage and two or more minimum values of the temperature change value corresponding to the voltage may occur, one of the maximum values of the temperature change value corresponding to the voltage may be used as a first temperature change extremum, and one of the minimum values of the temperature change value corresponding to the voltage may be used as a second temperature change extremum. For example, the first temperature change extremum may be 0.15 ℃, the voltage corresponding to 0.15 ℃ is 3.83V, the second temperature change extremum may be 0.11 ℃, the voltage corresponding to 0.11 ℃ is 3.81V, the voltage in the sub-data set may be a voltage in the range of 3.81V-3.83V, and the temperature change value corresponding to the voltage in the sub-data set may be a temperature change value in the range of 0.11 ℃ to 0.15 ℃. The second temperature change extremum may be 0.04 ℃, the voltage corresponding to 0.04 ℃ is 3.1V, the first temperature change extremum may be 0.09 ℃, the voltage corresponding to 0.09 ℃ is 3.2V, the voltage in the sub data set may be a voltage in the range of 3.1V-3.2V, and the temperature change value corresponding to the voltage in the sub data set may be a temperature change value in the range of 0.04 ℃ to 0.09 ℃.
Optionally, referring to fig. 4, in order to clearly show the relationship between the voltage and the corresponding temperature change value, the present embodiment provides a schematic diagram of the voltage and the corresponding temperature change value for reference, and it should be noted that the battery attenuation identifying method does not include a process of drawing the graph. The voltage is shown on the abscissa in fig. 4, the temperature change value corresponding to the voltage is shown on the ordinate in fig. 4, the region selected by the dashed box in fig. 4 can be used to represent the sub-data set, the voltage in the sub-data set is shown on the abscissa in the region, the temperature change value in the sub-data set is shown on the ordinate in the region, and P 1 The ordinate of the dot represents the minimum value of the temperature change value corresponding to the voltage, P 2 The ordinate of the dot represents the maximum value of the temperature change value corresponding to the voltage.
S22, acquiring the identification slope based on the sub-data set.
Optionally, the implementation method for obtaining the identification slope includes: and fitting the voltage in the sub-data set and the temperature change value corresponding to the voltage in the sub-data set to obtain the identification slope, wherein the identification slope is a straight line related to the voltage in the sub-data set and the temperature change value corresponding to the voltage in the sub-data set, and the transverse axis can be a coordinate axis related to the voltage in the sub-data set relative to the inclination degree of the transverse axis. In addition, the voltages in the sub-data sets and the temperature change values in the sub-data sets are in a one-to-one correspondence, for example, there is a temperature change value corresponding to voltages 3.2V and 3.2V in the sub-data sets of 0.09 ℃,3.2V is a voltage corresponding to the temperature change value of 0.09 ℃, and 0.09 ℃ is a temperature change value corresponding to the voltage of 3.2V.
Optionally, the temperature change value in the sub-data set is expressed as:
δT＝k 1 ×U+k 0
wherein δT represents a temperature change value in the sub-data set, U represents a voltage corresponding to the temperature change value in the sub-data set, and k 1 Representation houseThe identification slope, k 0 Representing the recognition intercept.
Optionally, based on the sub-data set and the recognition slope, a goodness of fit of a recognition line to the sub-data set is obtained. The recognition line is determined by the recognition slope and recognition intercept, the goodness of fit may be used to reflect the degree of fit of the recognition line to the sub-data set, e.g., when the goodness of fit is 0.974, indicating that the degree of fit of the recognition line to the sub-data set is good, the recognition slope is reliable.
Optionally, referring to fig. 5, in order to clearly show the identification slope, a schematic diagram of the identification slope is provided in this embodiment. It should be noted that the battery decay identification method does not include the process of drawing the graph. The abscissa corresponding to the curve in fig. 5 contains the voltages in the sub-data set, the ordinate corresponding to the curve in fig. 5 contains the temperature change values in the sub-data set, the slope of the identification straight line L in fig. 5 is the identification slope, and the intercept of the straight line L and the coordinate axis is the identification intercept.
As can be seen from the above description, the method for obtaining the identification slope according to the present embodiment includes: acquiring a sub-data set of the battery data based on the temperature change value corresponding to the voltage and the voltage, wherein the temperature change value in the sub-data set is a temperature change value ranging from a maximum value of the temperature change value corresponding to the voltage to a minimum value of the temperature change value corresponding to the voltage, or from a minimum value of the temperature change value corresponding to the voltage to a maximum value of the temperature change value corresponding to the voltage; and acquiring the identification slope based on the sub-data set.
The sub-data set of the battery data is obtained and is equivalent to a process of screening the battery data, the calculation complexity of the screening process is low, and effective data can be quickly obtained from the battery data, so that the overall efficiency of the battery identification method is improved, and meanwhile, the screening process occupies little hardware resources.
As shown in fig. 6, the implementation method for obtaining attenuation information of the battery includes:
s31, acquiring a slope ratio of the identification slope to the reference slope based on the identification slope and the reference slope.
Optionally, the attenuation information of the battery is expressed as:
wherein ,k1 (Si) Representing the identified slope, k 1 (S1) Represents the reference slope, D k (Si) Represents the slope ratio, S i Can be expressed as the i-th battery state, S 1 May be identified as an initial battery state. For example, the battery may have three battery states, namely, a battery state in which the battery has not undergone a charge-discharge cycle, a battery state in which the battery has undergone 500 charge-discharge cycles, and a battery state in which the battery has undergone 1000 charge-discharge cycles, S 1 Can be expressed as a battery state in which the battery has not undergone charge-discharge cycles, S 2 Can be expressed as a battery state in which the battery undergoes 500 charge and discharge cycles, S 3 May be expressed as a battery state in which the battery undergoes 1000 charge and discharge cycles.
S32, based on the slope ratio, obtaining attenuation information of the battery.
Optionally, based on the slope ratio, the implementation method for obtaining the attenuation information of the battery includes: and acquiring attenuation information of the battery based on a section range in which the slope ratio is positioned, wherein a mapping between the section range and the attenuation information is acquired according to battery data of the same type of battery in actual operation and attenuation information of the same type of battery in actual operation. The battery data of the same type of battery in actual operation can be historical battery data of the same type of battery, the attenuation information of the same type of battery in actual operation can be historical attenuation information of the same type of battery, and the attenuation information of the same type of battery in actual operation can be easily obtained, so that the mapping between the interval range and the attenuation information can be conveniently obtained according to the battery data of the same type of battery in actual operation. The mapping between the interval range and the attenuation information may be, for example, that the interval range may include A, B, C three ranges, the attenuation information may include severe attenuation, occurrence of attenuation, and unattenuated, the attenuation information corresponding to a may be severe attenuation, the attenuation information corresponding to a may be occurrence of attenuation, and the attenuation information corresponding to a range B may be unattenuated.
Preferably, in an embodiment, when the slope ratio is in the interval (0, 0.8), the attenuation information of the battery is severely attenuated, when the slope ratio is in the interval [0.8,0.9 ], the attenuation information of the battery is attenuated, and when the slope ratio is in the interval [0.9,1], the attenuation information of the battery is not attenuated.
Optionally, the battery data may include data of the battery in a charged state and/or data of the battery in a discharged state, the slope ratio may include a first slope ratio and a second slope ratio, where the first slope ratio is a slope ratio when the battery data is data of the battery in a charged state, and the second slope ratio may be a slope ratio when the battery data is data of the battery in a discharged state, and the implementation method for obtaining the attenuation information of the battery further includes: acquiring an average slope ratio based on the first slope ratio and the second slope ratio; and acquiring attenuation information of the battery based on the average slope ratio. Compared with the slope ratio in a single state, the average slope ratio is obtained at the same time, so that the accuracy of the battery attenuation identification result can be improved.
The protection scope of the battery attenuation identification method according to the embodiment of the present application is not limited to the execution sequence of the steps listed in the embodiment, and all the schemes implemented by adding or removing steps and replacing steps according to the prior art according to the principles of the present application are included in the protection scope of the present application.
As shown in fig. 7, the present embodiment provides a battery attenuation identifying device 700, the battery attenuation identifying device 700 includes:
the battery data acquisition module 710 is configured to acquire battery data at several times, where the battery data includes voltage and temperature.
The identifying slope obtaining module 720 is configured to obtain an identifying slope based on a temperature change value corresponding to the voltage and the voltage, where the temperature change value is a change value of the temperature at different time.
And the attenuation information obtaining module 730 is configured to obtain attenuation information of the battery based on the identification slope and the reference slope.
As can be seen from the above description, the battery attenuation identifying device 700 according to the present embodiment can identify the attenuation of the battery only by acquiring the battery data at several times, so that the battery attenuation identifying device requires relatively less data for identification, and the battery attenuation identifying device can improve the identification efficiency of the attenuation of the battery due to the simple data processing process in the battery attenuation identifying device. In addition, the temperature is easy to collect, so that the battery attenuation identification device has an extremely wide application range.
In the several embodiments provided in this application, it should be understood that the disclosed apparatus or method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of modules/units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple modules or units may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or modules or units, which may be in electrical, mechanical or other forms.
The modules/units illustrated as separate components may or may not be physically separate, and components shown as modules/units may or may not be physical modules, i.e., may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules/units may be selected according to actual needs to achieve the purposes of the embodiments of the present application. For example, functional modules/units in various embodiments of the present application may be integrated into one processing module, or each module/unit may exist alone physically, or two or more modules/units may be integrated into one module/unit.
Those of ordinary skill would further appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, in computer software, or in a combination of the two, and that the elements and steps of the examples have been generally described in terms of function in the foregoing description to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The embodiment provides an electronic device, which comprises a memory, wherein a computer program is stored in the memory; a processor, communicatively connected to the memory, for executing the battery decay identification method shown in fig. 2 when the computer program is invoked; and the display is in communication connection with the processor and the memory and is used for displaying a related GUI interactive interface of the battery attenuation identification method.
Embodiments of the present application also provide a computer-readable storage medium. Those of ordinary skill in the art will appreciate that all or part of the steps in the method implementing the above embodiments may be implemented by a program to instruct a processor, where the program may be stored in a computer readable storage medium, where the storage medium is a non-transitory (non-transitory) medium, such as a random access memory, a read only memory, a flash memory, a hard disk, a solid state disk, a magnetic tape (magnetic tape), a floppy disk (floppy disk), an optical disk (optical disk), and any combination thereof. The storage media may be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a digital video disc (digital video disc, DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.
Embodiments of the present application may also provide a computer program product comprising one or more computer instructions. When the computer instructions are loaded and executed on a computing device, the processes or functions described in accordance with the embodiments of the present application are produced in whole or in part. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, or data center to another website, computer, or data center by a wired (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.).
The computer program product is executed by a computer, which performs the method according to the preceding method embodiment. The computer program product may be a software installation package, which may be downloaded and executed on a computer in case the aforementioned method is required.
The descriptions of the processes or structures corresponding to the drawings have emphasis, and the descriptions of other processes or structures may be referred to for the parts of a certain process or structure that are not described in detail.
The foregoing embodiments are merely illustrative of the principles of the present application and their effectiveness, and are not intended to limit the application. Modifications and variations may be made to the above-described embodiments by those of ordinary skill in the art without departing from the spirit and scope of the present application. Accordingly, it is intended that all equivalent modifications and variations which may be accomplished by persons skilled in the art without departing from the spirit and technical spirit of the disclosure be covered by the claims of this application.
Claims (10)
1. A battery degradation identification method, characterized in that the battery degradation identification method comprises:
acquiring battery data at a plurality of moments, wherein the battery data comprise voltage and temperature;
acquiring an identification slope based on a temperature change value corresponding to the voltage and the voltage, wherein the temperature change value is the temperature change value at two different moments;
and acquiring attenuation information of the battery based on the identification slope and the reference slope.
2. The battery decay identification method of claim 1, wherein the method for obtaining the identification slope comprises:
acquiring a sub-data set of the battery data based on the temperature change value corresponding to the voltage and the voltage, wherein the temperature change value in the sub-data set is a temperature change value ranging from a maximum value of the temperature change value corresponding to the voltage to a minimum value of the temperature change value corresponding to the voltage, or from a minimum value of the temperature change value corresponding to the voltage to a maximum value of the temperature change value corresponding to the voltage;
and acquiring the identification slope based on the sub-data set.
3. The battery decay identification method of claim 2, wherein the temperature change value in the sub-data set is represented as:
δT＝k 1 ×U+k 0
wherein δT represents a temperature change value in the sub-data set, U represents a voltage corresponding to the temperature change value in the sub-data set, and k 1 Representing the identified slope, k 0 Representing the recognition intercept.
4. The battery degradation identification method according to claim 3, wherein the implementation method for acquiring the battery degradation information comprises:
acquiring a slope ratio of the identified slope to the reference slope based on the identified slope and the reference slope;
and acquiring attenuation information of the battery based on the slope ratio.
5. The battery degradation identification method according to claim 4, wherein the battery degradation information is expressed as:
wherein ,
representing the recognition slope,/->
Representing the reference slope,/->
Representing the slope ratio.
6. The battery degradation identification method according to claim 4, wherein the implementation method for acquiring the battery degradation information based on the slope ratio comprises: and acquiring attenuation information of the battery based on a section range in which the slope ratio is positioned, wherein a mapping between the section range and the attenuation information is acquired according to battery data of the same type of battery in actual operation and attenuation information of the same type of battery in actual operation.
7. The battery degradation identification method according to claim 1, wherein when the battery data contains the same voltage, the method for obtaining the battery data at several times comprises: and screening the same voltages to obtain the last collected voltage or the first collected voltage in the same voltages.
8. A battery degradation identification device, characterized in that the battery degradation identification device comprises:
the battery data acquisition module is used for acquiring battery data at a plurality of moments, wherein the battery data comprise voltage and temperature;
the identification slope obtaining module is used for obtaining an identification slope based on a temperature change value corresponding to the voltage and the voltage, wherein the temperature change value is a change value of the temperature at different moments;
and the attenuation information acquisition module is used for acquiring the attenuation information of the battery based on the identification slope and the reference slope.
9. A computer readable storage medium having stored thereon a computer program, which when executed by a processor implements the battery fade identification method of any one of claims 1-7.
10. An electronic device, the electronic device comprising:
a memory storing a computer program;
a processor communicatively coupled to the memory, the processor executing the battery fade identification method of any one of claims 1-7 when the computer program is invoked;
and the display is in communication connection with the processor and the memory and is used for displaying a related GUI interactive interface of the battery attenuation identification method.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116879760A (en) * | 2023-09-06 | 2023-10-13 | 深圳市杰成镍钴新能源科技有限公司 | Historical overcharge fault diagnosis method and device for retired power battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116879760A (en) * | 2023-09-06 | 2023-10-13 | 深圳市杰成镍钴新能源科技有限公司 | Historical overcharge fault diagnosis method and device for retired power battery |
| CN116879760B (en) * | 2023-09-06 | 2023-12-01 | 深圳市杰成镍钴新能源科技有限公司 | Historical overcharge fault diagnosis method and device for retired power battery |
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