CN118209878A - Battery detection method, device, computer equipment and storage medium - Google Patents
Battery detection method, device, computer equipment and storage medium Download PDFInfo
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Abstract
The application relates to a battery detection method, a battery detection device, a computer device and a storage medium. The method comprises the following steps: acquiring first change information of target performance parameters of a first battery and second change information of target performance parameters of a second battery in a charging and discharging process; and determining whether the performances of the first battery and the second battery are consistent according to the first change information and the second change information. The performance change trend of the first battery is obtained according to the first change information, the performance change trend of the second battery is obtained according to the second change information, the similarity of the first battery and the second battery is further obtained, the accuracy of the obtained similarity is improved, and therefore the accuracy of consistency among the detection batteries is improved.
Description
Technical Field
The present application relates to the field of lithium ion battery technologies, and in particular, to a battery detection method, a device, a computer device, and a storage medium.
Background
In order to ensure the use effect and the use safety of the battery pack, consistency evaluation needs to be carried out on each lithium ion battery in the battery pack, and the battery pack is formed based on the lithium ion batteries with high consistency.
In the conventional technology, the consistency between the lithium ion batteries is generally evaluated by detecting the performance parameters between the lithium ion batteries and comparing the performance parameters, or the consistency between the lithium ion batteries is determined by referring to the factory information of the lithium ion batteries.
However, the above method of detecting the uniformity between the lithium ion batteries has a problem of low calculation accuracy.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a battery detection method, apparatus, computer device, and storage medium that can improve accuracy in detecting consistency between lithium ions.
In a first aspect, the present application provides a battery detection method, including:
Acquiring first change information of target performance parameters of a first battery and second change information of target performance parameters of a second battery in a charging and discharging process;
And determining whether the performances of the first battery and the second battery are consistent according to the first change information and the second change information.
In one embodiment, the first variation information is represented by a first curve, the second variation information is represented by a second curve, and determining whether the performances of the first battery and the second battery are consistent according to the first variation information and the second variation information includes:
Determining a similarity between the first curve and the second curve;
If the similarity is greater than or equal to a preset threshold, the performances of the first battery and the second battery are consistent;
and if the similarity is smaller than the preset threshold, the performances of the first battery and the second battery are inconsistent.
In one embodiment, the determining the similarity between the first curve and the second curve includes:
Determining the difference area of the first curve and the second curve, and determining the enclosing area of the first curve and the second curve;
and determining the similarity of the first battery and the second battery according to the ratio of the difference area to the enclosing area.
In one embodiment, the determining the difference area between the first curve and the second curve includes:
And in the time period of the charge-discharge process, carrying out integral operation on the difference value of the first curve and the second curve to obtain the difference value area.
In one embodiment, the determining the area enclosed by the first curve and the second curve includes:
and in the time period of the charge-discharge process, carrying out integral operation on the sum of the absolute value of the first curve and the absolute value of the second curve to obtain the enclosing area.
In one embodiment, the method further comprises:
Determining whether each point in time on the first curve coincides with each point in time on the second curve;
If the first curve and the second curve are inconsistent, performing interpolation operation on the first curve or the second curve to generate a target curve, taking the target curve as a new first curve or a new second curve, and returning to execute the step of determining the similarity between the first curve and the second curve;
And if so, executing the step of determining the similarity between the first curve and the second curve.
In one embodiment, the interpolating the first curve or the second curve to generate a target curve includes:
determining a first number of points in time on the first curve and a second number of points in time on the second curve;
if the first number is larger than the second number, performing interpolation operation on the second curve to generate the target curve;
and if the first quantity is smaller than the second quantity, performing difference operation on the first curve to generate the target curve.
In a second aspect, the present application also provides a battery detection device, including:
the device comprises an acquisition module, a storage module and a control module, wherein the acquisition module is used for acquiring first change information of target performance parameters of a first battery and second change information of target performance parameters of a second battery in a charging and discharging process;
And the determining module is used for determining whether the performances of the first battery and the second battery are consistent according to the first change information and the second change information.
In a third aspect, the present application also provides a computer device comprising a memory and a processor, the memory storing a computer program, the processor implementing the following steps when executing the computer program:
Acquiring first change information of target performance parameters of a first battery and second change information of target performance parameters of a second battery in a charging and discharging process;
And determining whether the performances of the first battery and the second battery are consistent according to the first change information and the second change information.
In a fourth aspect, the present application also provides a computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of:
Acquiring first change information of target performance parameters of a first battery and second change information of target performance parameters of a second battery in a charging and discharging process;
And determining whether the performances of the first battery and the second battery are consistent according to the first change information and the second change information.
In a fifth aspect, the application also provides a computer program product comprising a computer program which, when executed by a processor, performs the steps of:
Acquiring first change information of target performance parameters of a first battery and second change information of target performance parameters of a second battery in a charging and discharging process;
And determining whether the performances of the first battery and the second battery are consistent according to the first change information and the second change information.
The battery detection method, the device, the computer equipment and the storage medium acquire first change information of target performance parameters of the first battery and second change information of target performance parameters of the second battery in the charge and discharge processes; and determining whether the performances of the first battery and the second battery are consistent according to the first change information and the second change information. The performance change trend of the first battery is obtained according to the first change information, the performance change trend of the second battery is obtained according to the second change information, the similarity of the first battery and the second battery is further obtained, the accuracy of the obtained similarity is improved, and therefore the accuracy of consistency among the detection batteries is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the related art, the drawings that are required to be used in the embodiments or the related technical descriptions will be briefly described, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.
FIG. 1is a diagram of an application environment for a battery detection method in one embodiment;
FIG. 2 is a flow chart of a method of battery detection in one embodiment;
FIG. 3 is a flow chart of a battery detection method according to another embodiment;
FIG. 4 is a schematic diagram of voltage variation information of a first battery and a second battery;
FIG. 5 is a schematic diagram of a first curve and a second curve formed according to voltage variation information;
FIG. 6 is a schematic diagram of current variation information of a first battery and a second battery;
FIG. 7 is a schematic diagram of a first curve and a second curve formed according to current variation information;
FIG. 8 is a flow chart of a battery detection method according to another embodiment;
FIG. 9 is a flow chart of a battery detection method according to another embodiment;
FIG. 10 is a flow chart of a method of battery detection in another embodiment;
FIG. 11 is a flowchart of a battery detection method according to another embodiment;
FIG. 12 is a block diagram of a battery detection device in one embodiment;
FIG. 13 is a block diagram showing the structure of a battery detection device according to another embodiment;
FIG. 14 is a block diagram showing the structure of a battery detection device according to another embodiment;
fig. 15 is a block diagram showing the structure of a battery detection device according to another embodiment.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
The battery detection method provided by the embodiment of the application can be applied to an application environment shown in fig. 1. The computer device may be a server, and the internal structure thereof may be as shown in fig. 1. The computer device includes a processor, a memory, an Input/Output interface (I/O) and a communication interface. The processor, the memory and the input/output interface are connected through a system bus, and the communication interface is connected to the system bus through the input/output interface. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The database of the computer device is for storing battery detection data. The input/output interface of the computer device is used to exchange information between the processor and the external device. The communication interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a battery detection method.
It will be appreciated by those skilled in the art that the architecture shown in fig. 1 is merely a block diagram of some of the architecture relevant to the present inventive arrangements and is not limiting as to the computer device to which the present inventive arrangements may be implemented, as a particular computer device may include more or less components than those shown, or may be combined with some components, or may have a different arrangement of components.
In one embodiment, as shown in fig. 2, a battery detection method is provided, and the method is applied to the server in fig. 1 for illustration, and includes:
S201, obtaining first change information of target performance parameters of the first battery and second change information of target performance parameters of the second battery in the charge and discharge process.
The target performance parameter may be any one of a voltage parameter, a current parameter, and a temperature parameter. For example, information on the change in the voltage of the first battery during charge and discharge and information on the change in the voltage of the second battery during charge and discharge may be obtained; or the change information of the current of the first battery in the charging and discharging process and the change information of the current of the second battery in the charging and discharging process can be obtained.
In the embodiment of the application, the data of the first battery in the charge and discharge process and the data of the second battery in the charge and discharge process are acquired according to the acquisition device. For example, when the target performance parameter is a voltage parameter, the voltage acquisition device may acquire first variation information of the first battery during the charge and discharge process and second variation information of the second battery during the charge and discharge process.
S202, determining whether the performances of the first battery and the second battery are consistent according to the first change information and the second change information.
In the embodiment of the application, the performance change trend of the first battery in the charge and discharge process is determined according to the first change information, the performance change trend of the second battery in the charge and discharge process is determined according to the second change information, and further, the similarity of the first battery and the second battery is determined according to the performance change trend of the first battery and the performance change trend of the second battery, so that whether the performances of the first battery and the second battery are consistent is determined according to the similarity of the first battery and the second battery.
Optionally, a plurality of time points may be determined, and data corresponding to the time points are extracted from the first change information and the second change information according to the plurality of time points, so as to obtain a plurality of data pairs, thereby determining whether the performances of the first battery and the second battery are consistent by judging the consistency of the plurality of data pairs, for example, when the number of the consistent data pairs is greater than or equal to a preset number threshold, the performances of the first battery and the second battery may be determined to be consistent; when the number of data pairs that are consistent is less than a preset number threshold, it may be determined that the performance of the first battery and the second battery are inconsistent.
The battery detection method comprises the steps of obtaining first change information of target performance parameters of a first battery and second change information of target performance parameters of a second battery in a charging and discharging process; and determining whether the performances of the first battery and the second battery are consistent according to the first change information and the second change information. The performance change trend of the first battery is obtained according to the first change information, the performance change trend of the second battery is obtained according to the second change information, the similarity of the first battery and the second battery is further obtained, the accuracy of the obtained similarity is improved, and therefore the accuracy of consistency among the detection batteries is improved.
In one embodiment, an implementation manner of the foregoing S202 is provided, where the first change information is represented by a first curve, and the second change information is represented by a second curve, as shown in fig. 3, and the foregoing "determining whether the performance of the first battery and the second battery is consistent according to the first change information and the second change information" includes:
S301, determining the similarity between the first curve and the second curve.
In the embodiment of the application, a first curve is generated according to the first change information, and a second curve is generated according to the second change information. Illustratively, fig. 4 is a diagram of voltage change information of a first battery and a second battery, and as shown in fig. 5, a first curve is generated according to the voltage change information of the battery 1, and a second curve is generated according to the voltage change information of the battery 2; fig. 6 shows current change information of the first battery and the second battery, and as shown in fig. 7, a first curve is generated based on the current change information of the battery 1, and a second curve is generated based on the current change information of the battery 2. Optionally, the similarity between the first curve and the second curve may be determined according to the coincidence ratio of the first curve and the second curve; or the data of a plurality of sampling points can be obtained from the first curve, and then the data of a plurality of corresponding sampling points can be obtained from the second curve, so that a plurality of groups of data are obtained, and the similarity of the first curve and the second curve is determined by determining the consistency among the groups of data.
S302, if the similarity is greater than or equal to a preset threshold, the performances of the first battery and the second battery are consistent.
Optionally, the similarity between the first curve and the second curve is the similarity between the first battery and the second battery.
In the embodiment of the application, if the similarity of the first curve and the second curve is greater than or equal to the preset threshold, the similarity of the first curve and the second curve is higher, that is, the change trend of the curves is basically consistent, which can be regarded as that the first curve and the second curve are consistent, and the performances of the first battery and the second battery are consistent in the charge and discharge process.
And S303, if the similarity is smaller than a preset threshold, the performances of the first battery and the second battery are inconsistent.
In the embodiment of the application, if the similarity between the first curve and the second curve is smaller than the preset threshold, the difference between the first curve and the second curve is larger, namely the variation trend of the performance of the first battery and the second battery in the charging and discharging process is larger, and the first curve and the second curve are inconsistent, namely the performance of the first battery and the second battery in the charging and discharging process is inconsistent.
In this embodiment, by determining the similarity between the first curve and the second curve, it is determined whether the performance of the first battery is consistent with that of the second battery, and since the data represented by the first curve and the second curve are more accurate, and the expression forms of the first curve and the second curve are more visual and less prone to error, the determination result of the performance consistency of the first battery and the second battery obtained through the first curve and the second curve is more accurate.
In one embodiment, an implementation manner of the above S301 is provided, as shown in fig. 8, where the "determining the similarity between the first curve and the second curve" includes:
s401, determining the difference area of the first curve and the second curve, and determining the enclosing area of the first curve and the second curve.
The area of the difference may be an area between the first curve and the second curve in the coordinate system, and the area enclosed by the area may be a sum of an area corresponding to the first curve and an area corresponding to the second curve in the coordinate system.
Alternatively, the area between the first curve and the second curve may be determined by using the preset component, so as to obtain the difference area between the first curve and the second curve, and the area corresponding to the first curve and the area corresponding to the second curve may be determined by using the preset component, so as to determine the area enclosed by the first curve and the second curve.
In another alternative embodiment, in the embodiment of the present application, during a period of time in a charging and discharging process, an integral operation is performed on a difference value between the first curve and the second curve to obtain a difference area. The integrating operation of the difference value between the first curve and the second curve may be: Wherein/> Is the difference area/>For the first curve,/>For the second curve, t o and t 1 are preset sampling times.
Optionally, in the embodiment of the present application, in a period of time during the charging and discharging process, an integral operation is performed on a sum of an absolute value of the first curve and an absolute value of the second curve to obtain the enclosed area. The integrating operation of the sum of the absolute value of the first curve and the absolute value of the second curve may be:，/> to enclose an area,/> For the first curve,/>For the second curve, t o and t 1 are preset sampling times.
S402, determining the similarity of the first battery and the second battery according to the ratio of the difference area to the enclosing area.
In the embodiment of the application, the ratio of the difference area to the surrounding area is determined, so that the similarity between the first battery and the second battery is determined according to the ratio of the difference area to the surrounding area.
Optionally, if the ratio of the difference area to the enclosed area is greater than or equal to the preset ratio, determining that the similarity between the first battery and the second battery is higher; if the ratio of the difference area to the surrounding area is smaller than the preset ratio, the similarity between the first battery and the second battery is determined to be lower.
As another alternative implementation manner, in the embodiment of the present application, the determination process of the similarity between the first battery and the second battery may be as shown in equation 1:
(1)
Wherein S is the similarity between the first battery and the second battery,Is the difference area/>Is an enclosed area.
In this embodiment, the similarity between the first battery and the second battery is further determined by determining an area defined by a predicted area of the difference between the first curve and the second curve, so that the accuracy of the similarity between the first battery and the second battery is improved.
In one embodiment, as shown in fig. 9, the above battery detection method further includes:
s203, determining whether each time point on the first curve coincides with each time point on the second curve.
In the embodiment of the application, the first curve is formed by data acquired at a plurality of time points, and the second curve is formed by data acquired at a plurality of time points, but each time point in the first curve may not completely coincide with each time point in the second curve, and the accuracy of the similarity between the first battery and the second battery determined according to the first curve and the second curve, which are inconsistent with each time point, is low, so that whether each time point on the first curve coincides with each time point on the second curve is determined before the similarity is determined.
And S204, if the first curve or the second curve is inconsistent, performing interpolation operation on the first curve or the second curve to generate a target curve, taking the target curve as a new first curve or a new second curve, and returning to the step of determining the similarity between the first curve and the second curve.
In the embodiment of the application, if each time point on the first curve is inconsistent with each time point on the second curve, interpolation operation is performed on the curve with fewer time points to form a new first curve or a new second curve, so that each time point on the first curve is consistent with each time point on the second curve, and further, the similarity between the first curve and the second curve is determined according to the first curve and the second curve after the interpolation operation.
S205, if they are consistent, a step of determining the similarity between the first curve and the second curve is performed.
In the embodiment of the application, if each time point on the first curve is consistent with each time point on the second curve, each time point of the first curve corresponds to each time point of the second curve, interpolation operation is not needed to be carried out on the first curve or the second curve, and the similarity between the first curve and the second curve is determined according to the first curve and the second curve.
In this embodiment, to ensure accuracy of the similarity between the determined first curve and the determined second curve, it is first determined whether each time point on the first curve is consistent with each time point on the second curve, and if not, the similarity between the first curve and the second curve is determined after interpolation operation is performed on the first curve or the second curve.
In one embodiment, an implementation manner of S204 is provided, as shown in fig. 10, where "performing interpolation operation on the first curve or the second curve to generate the target curve" includes:
s501, determining a first number of time points on a first curve and a second number of time points on a second curve.
In the embodiment of the application, a first number of time points on a first curve is determined, and a second number of time points on a second curve is determined, so that interpolation operation is performed on the first curve or interpolation operation is performed on the second curve according to the first number and the second number.
S502, if the first number is larger than the second number, interpolation operation is carried out on the second curve, and a target curve is generated.
In the embodiment of the application, if the first number is greater than the second number, interpolation operation is performed on the second curve, so that the time point of the second curve is increased to be consistent with the time point of the first curve.
S503, if the first quantity is smaller than the second quantity, performing a difference operation on the first curve to generate a target curve.
In the embodiment of the application, if the first number is smaller than the second number, interpolation operation is performed on the first curve, so that the time point of the first curve is increased to be consistent with the time point of the second curve.
In this embodiment, interpolation is performed on a curve with a smaller number of time points in the first curve and the second curve, so that each time point on the first curve is consistent with each time point on the second curve, thereby improving accuracy of the determined similarity between the first curve and the second curve.
In one embodiment, fig. 11 provides a flow chart of a method of traffic transmission. As shown in fig. 7, the method includes the steps of:
S1, acquiring first change information of target performance parameters of a first battery and second change information of target performance parameters of a second battery in a charging and discharging process; the first variation information is characterized by a first curve and the second variation information is characterized by a second curve.
S2, determining whether each time point on the first curve is consistent with each time point on the second curve; if not, step S3 is executed, and if so, step S6 is executed.
S3, determining a first number of time points on the first curve and a second number of time points on the second curve.
S4, if the first number is larger than the second number, performing interpolation operation on the second curve to generate a target curve; if the first quantity is smaller than the second quantity, performing difference operation on the first curve to generate a target curve.
S5, taking the target curve as a new first curve or a new second curve, and executing a step S6;
S6, in the time period of the charge-discharge process, carrying out integral operation on the difference value of the first curve and the second curve to obtain a difference value area.
And S7, in the time period of the charge-discharge process, carrying out integral operation on the sum of the absolute value of the first curve and the absolute value of the second curve to obtain an enclosed area.
S8, determining the similarity of the first battery and the second battery according to the ratio of the area of the difference to the area enclosed by the first battery and the second battery.
S9, if the similarity is greater than or equal to a preset threshold, the performances of the first battery and the second battery are consistent; and if the similarity is smaller than a preset threshold, the performances of the first battery and the second battery are inconsistent.
The battery detection method comprises the steps of obtaining first change information of target performance parameters of a first battery and second change information of target performance parameters of a second battery in a charging and discharging process; and determining whether the performances of the first battery and the second battery are consistent according to the first change information and the second change information. The performance change trend of the first battery is obtained according to the first change information, the performance change trend of the second battery is obtained according to the second change information, the similarity of the first battery and the second battery is further obtained, the accuracy of the obtained similarity is improved, and therefore the accuracy of consistency among the detection batteries is improved.
It should be understood that, although the steps in the flowcharts related to the embodiments described above are sequentially shown as indicated by arrows, these steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in the flowcharts described in the above embodiments may include a plurality of steps or a plurality of stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of the steps or stages is not necessarily performed sequentially, but may be performed alternately or alternately with at least some of the other steps or stages.
Based on the same inventive concept, the embodiment of the application also provides a battery detection device for realizing the above related battery detection method. The implementation of the solution provided by the device is similar to that described in the above method, so the specific limitation of the embodiment of the battery detection device or devices provided below may be referred to the limitation of the battery detection method hereinabove, and will not be repeated here.
In one embodiment, as shown in fig. 12, there is provided a battery detection apparatus including: an acquisition module 10 and a first determination module 11, wherein:
an obtaining module 10, configured to obtain first change information of a target performance parameter of a first battery and second change information of a target performance parameter of a second battery during a charging and discharging process;
the first determining module 11 is configured to determine whether the performance of the first battery and the second battery are consistent according to the first variation information and the second variation information.
The battery detection device provided in this embodiment may perform the above method embodiment, and its implementation principle and technical effects are similar, and are not described herein again.
In one embodiment, as shown in fig. 13, the first determining module 11 includes: a first determination unit 111, a second determination unit 112, and a third determination unit 113, wherein:
A first determining unit 111 for determining a similarity between the first curve and the second curve.
The second determining unit 112 is configured to determine that the performances of the first battery and the second battery are consistent in a case where it is determined that the similarity is greater than or equal to a preset threshold.
And a third determining unit 113 configured to determine that the performances of the first battery and the second battery are inconsistent in a case where the similarity is smaller than a preset threshold.
The battery detection device provided in this embodiment may perform the above method embodiment, and its implementation principle and technical effects are similar, and are not described herein again.
In one embodiment, the first determining unit 111 is specifically configured to determine a difference area between the first curve and the second curve, and determine an area enclosed by the first curve and the second curve; and determining the similarity of the first battery and the second battery according to the ratio of the difference area to the enclosing area.
The battery detection device provided in this embodiment may perform the above method embodiment, and its implementation principle and technical effects are similar, and are not described herein again.
In one embodiment, the first determining unit 111 is specifically configured to perform an integral operation on the difference between the first curve and the second curve in a time period of the charge-discharge process, so as to obtain a difference area.
The battery detection device provided in this embodiment may perform the above method embodiment, and its implementation principle and technical effects are similar, and are not described herein again.
In one embodiment, the first determining unit 111 is specifically configured to perform an integral operation on a sum of an absolute value of the first curve and an absolute value of the second curve in a period of time during the charge and discharge process, so as to obtain an enclosed area.
The battery detection device provided in this embodiment may perform the above method embodiment, and its implementation principle and technical effects are similar, and are not described herein again.
In one embodiment, as shown in fig. 14, the battery detection device further includes: a second determination module 12, an operation module 13 and an execution module 14, wherein:
A second determining module 12 is configured to determine whether each time point on the first curve coincides with each time point on the second curve.
The operation module 13 is configured to perform interpolation operation on the first curve or the second curve to generate a target curve, and return the target curve to the step of determining the similarity between the first curve and the second curve as a new first curve or a new second curve in the case of inconsistency.
The execution module 14 is configured to execute the step of determining the similarity between the first curve and the second curve in case of coincidence.
The battery detection device provided in this embodiment may perform the above method embodiment, and its implementation principle and technical effects are similar, and are not described herein again.
In one embodiment, as shown in fig. 15, the operation module 13 includes: a fourth determination unit 131, a first operation unit 132, and a second operation unit 133, wherein:
a fourth determining unit 131 for determining a first number of time points on the first curve and a second number of time points on the second curve.
The first operation unit 132 is configured to perform interpolation operation on the second curve to generate a target curve when the first number is greater than the second number.
And a second calculation unit 133, configured to perform a difference calculation on the first curve to generate a target curve when the first number is smaller than the second number.
The battery detection device provided in this embodiment may perform the above method embodiment, and its implementation principle and technical effects are similar, and are not described herein again.
Each of the modules in the above battery detection device may be implemented in whole or in part by software, hardware, and combinations thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
In one embodiment, a computer device is provided comprising a memory and a processor, the memory having stored therein a computer program, the processor when executing the computer program performing the steps of:
Acquiring first change information of target performance parameters of a first battery and second change information of target performance parameters of a second battery in a charging and discharging process;
and determining whether the performances of the first battery and the second battery are consistent according to the first change information and the second change information.
In one embodiment, the processor when executing the computer program further performs the steps of:
determining a similarity between the first curve and the second curve;
if the similarity is greater than or equal to a preset threshold, the performances of the first battery and the second battery are consistent;
and if the similarity is smaller than a preset threshold, the performances of the first battery and the second battery are inconsistent.
In one embodiment, the processor when executing the computer program further performs the steps of:
determining the difference area of the first curve and the second curve, and determining the enclosing area of the first curve and the second curve;
and determining the similarity of the first battery and the second battery according to the ratio of the difference area to the enclosing area.
In one embodiment, the processor when executing the computer program further performs the steps of:
And in the time period of the charge-discharge process, carrying out integral operation on the difference value between the first curve and the second curve to obtain a difference value area.
In one embodiment, the processor when executing the computer program further performs the steps of:
and in the time period of the charge-discharge process, carrying out integral operation on the sum of the absolute value of the first curve and the absolute value of the second curve to obtain an enclosed area.
In one embodiment, the processor when executing the computer program further performs the steps of:
Determining whether each time point on the first curve is consistent with each time point on the second curve;
If the first curve and the second curve are inconsistent, performing interpolation operation on the first curve or the second curve to generate a target curve, taking the target curve as a new first curve or a new second curve, and returning to execute the step of determining the similarity between the first curve and the second curve;
if so, the step of determining the similarity between the first curve and the second curve is performed.
In one embodiment, the processor when executing the computer program further performs the steps of:
determining a first number of time points on the first curve and a second number of time points on the second curve;
if the first number is larger than the second number, performing interpolation operation on the second curve to generate a target curve;
if the first quantity is smaller than the second quantity, performing difference operation on the first curve to generate a target curve.
In one embodiment, a computer readable storage medium is provided having a computer program stored thereon, which when executed by a processor, performs the steps of:
Acquiring first change information of target performance parameters of a first battery and second change information of target performance parameters of a second battery in a charging and discharging process;
and determining whether the performances of the first battery and the second battery are consistent according to the first change information and the second change information.
In one embodiment, the computer program when executed by the processor further performs the steps of:
determining a similarity between the first curve and the second curve;
if the similarity is greater than or equal to a preset threshold, the performances of the first battery and the second battery are consistent;
and if the similarity is smaller than a preset threshold, the performances of the first battery and the second battery are inconsistent.
In one embodiment, the computer program when executed by the processor further performs the steps of:
determining the difference area of the first curve and the second curve, and determining the enclosing area of the first curve and the second curve;
and determining the similarity of the first battery and the second battery according to the ratio of the difference area to the enclosing area.
In one embodiment, the computer program when executed by the processor further performs the steps of:
And in the time period of the charge-discharge process, carrying out integral operation on the difference value between the first curve and the second curve to obtain a difference value area.
In one embodiment, the computer program when executed by the processor further performs the steps of:
and in the time period of the charge-discharge process, carrying out integral operation on the sum of the absolute value of the first curve and the absolute value of the second curve to obtain an enclosed area.
In one embodiment, the computer program when executed by the processor further performs the steps of:
Determining whether each time point on the first curve is consistent with each time point on the second curve;
If the first curve and the second curve are inconsistent, performing interpolation operation on the first curve or the second curve to generate a target curve, taking the target curve as a new first curve or a new second curve, and returning to execute the step of determining the similarity between the first curve and the second curve;
if so, the step of determining the similarity between the first curve and the second curve is performed.
In one embodiment, the computer program when executed by the processor further performs the steps of:
determining a first number of time points on the first curve and a second number of time points on the second curve;
if the first number is larger than the second number, performing interpolation operation on the second curve to generate a target curve;
if the first quantity is smaller than the second quantity, performing difference operation on the first curve to generate a target curve.
In one embodiment, a computer program product is provided comprising a computer program which, when executed by a processor, performs the steps of:
Acquiring first change information of target performance parameters of a first battery and second change information of target performance parameters of a second battery in a charging and discharging process;
and determining whether the performances of the first battery and the second battery are consistent according to the first change information and the second change information.
In one embodiment, the computer program when executed by the processor further performs the steps of:
determining a similarity between the first curve and the second curve;
if the similarity is greater than or equal to a preset threshold, the performances of the first battery and the second battery are consistent;
and if the similarity is smaller than a preset threshold, the performances of the first battery and the second battery are inconsistent.
In one embodiment, the computer program when executed by the processor further performs the steps of:
determining the difference area of the first curve and the second curve, and determining the enclosing area of the first curve and the second curve;
and determining the similarity of the first battery and the second battery according to the ratio of the difference area to the enclosing area.
In one embodiment, the computer program when executed by the processor further performs the steps of:
And in the time period of the charge-discharge process, carrying out integral operation on the difference value between the first curve and the second curve to obtain a difference value area.
In one embodiment, the computer program when executed by the processor further performs the steps of:
and in the time period of the charge-discharge process, carrying out integral operation on the sum of the absolute value of the first curve and the absolute value of the second curve to obtain an enclosed area.
In one embodiment, the computer program when executed by the processor further performs the steps of:
Determining whether each time point on the first curve is consistent with each time point on the second curve;
If the first curve and the second curve are inconsistent, performing interpolation operation on the first curve or the second curve to generate a target curve, taking the target curve as a new first curve or a new second curve, and returning to execute the step of determining the similarity between the first curve and the second curve;
if so, the step of determining the similarity between the first curve and the second curve is performed.
In one embodiment, the computer program when executed by the processor further performs the steps of:
determining a first number of time points on the first curve and a second number of time points on the second curve;
if the first number is larger than the second number, performing interpolation operation on the second curve to generate a target curve;
if the first quantity is smaller than the second quantity, performing difference operation on the first curve to generate a target curve.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, database, or other medium used in embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high density embedded nonvolatile Memory, resistive random access Memory (ReRAM), magneto-resistive random access Memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric Memory (Ferroelectric Random Access Memory, FRAM), phase change Memory (PHASE CHANGE Memory, PCM), graphene Memory, and the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, and the like. By way of illustration, and not limitation, RAM can be in various forms such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), etc. The databases referred to in the embodiments provided herein may include at least one of a relational database and a non-relational database. The non-relational database may include, but is not limited to, a blockchain-based distributed database, and the like. The processor referred to in the embodiments provided in the present application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, or the like, but is not limited thereto.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the application and are described in detail herein without thereby limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of the application should be assessed as that of the appended claims.
Claims (10)
1. A battery detection method, the method comprising:
Acquiring first change information of target performance parameters of a first battery and second change information of target performance parameters of a second battery in a charging and discharging process;
And determining whether the performances of the first battery and the second battery are consistent according to the first change information and the second change information.
2. The method of claim 1, wherein the first change information is characterized by a first curve and the second change information is characterized by a second curve, wherein determining whether the performance of the first battery and the second battery are consistent based on the first change information and the second change information comprises:
Determining a similarity between the first curve and the second curve;
If the similarity is greater than or equal to a preset threshold, the performances of the first battery and the second battery are consistent;
and if the similarity is smaller than the preset threshold, the performances of the first battery and the second battery are inconsistent.
3. The method of claim 2, wherein the determining the similarity between the first curve and the second curve comprises:
Determining the difference area of the first curve and the second curve, and determining the enclosing area of the first curve and the second curve;
and determining the similarity of the first battery and the second battery according to the ratio of the difference area to the enclosing area.
4. A method according to claim 3, wherein said determining the difference area of the first curve and the second curve comprises:
And in the time period of the charge-discharge process, carrying out integral operation on the difference value of the first curve and the second curve to obtain the difference value area.
5. A method according to claim 3, wherein said determining the area enclosed by the first curve and the second curve comprises:
and in the time period of the charge-discharge process, carrying out integral operation on the sum of the absolute value of the first curve and the absolute value of the second curve to obtain the enclosing area.
6. The method according to any one of claims 2-5, further comprising:
Determining whether each point in time on the first curve coincides with each point in time on the second curve;
If the first curve and the second curve are inconsistent, performing interpolation operation on the first curve or the second curve to generate a target curve, taking the target curve as a new first curve or a new second curve, and returning to execute the step of determining the similarity between the first curve and the second curve;
And if so, executing the step of determining the similarity between the first curve and the second curve.
7. The method of claim 6, wherein interpolating the first curve or the second curve to generate a target curve comprises:
determining a first number of points in time on the first curve and a second number of points in time on the second curve;
if the first number is larger than the second number, performing interpolation operation on the second curve to generate the target curve;
and if the first quantity is smaller than the second quantity, performing difference operation on the first curve to generate the target curve.
8. A battery testing device, the device comprising:
the device comprises an acquisition module, a storage module and a control module, wherein the acquisition module is used for acquiring first change information of target performance parameters of a first battery and second change information of target performance parameters of a second battery in a charging and discharging process;
And the first determining module is used for determining whether the performances of the first battery and the second battery are consistent according to the first change information and the second change information.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any of claims 1 to 7 when the computer program is executed.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 7.
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| CN202410424924.8A CN118209878A (en) | 2024-04-10 | 2024-04-10 | Battery detection method, device, computer equipment and storage medium |
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