CN113917343A - Battery module state detection method and device, electronic equipment and storage medium - Google Patents
Battery module state detection method and device, electronic equipment and storage medium Download PDFInfo
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- CN113917343A CN113917343A CN202111168873.XA CN202111168873A CN113917343A CN 113917343 A CN113917343 A CN 113917343A CN 202111168873 A CN202111168873 A CN 202111168873A CN 113917343 A CN113917343 A CN 113917343A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
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Abstract
The application provides a battery module state detection method, a device, an electronic device and a storage medium, wherein the method comprises the following steps: acquiring a plurality of data sets to be detected; the data set to be detected comprises charging data of the battery module to be detected in a preset detection period, wherein the charging data comprises voltage values of all battery cells in the battery module at each moment; determining the maximum voltage difference value between the battery cores of the battery module in each detection period according to each data set to be detected; and determining the state detection result of the battery module according to the maximum voltage difference value change condition between the battery cores of the adjacent detection periods. According to the method provided by the scheme, the state detection result of the battery module is determined according to the voltage change condition of the battery cell in the charging state, which is reflected by the maximum voltage difference value change condition between the battery cells in the adjacent detection periods, so that the objectivity of state detection is ensured, the influence of the maximum voltage difference value fluctuation condition between the battery cells on the state detection result is also considered, and the reliability of the state detection result is improved.
Description
Technical Field
The present disclosure relates to the field of battery detection technologies, and in particular, to a method and an apparatus for detecting a state of a battery module, an electronic device, and a storage medium.
Background
In order to solve the environmental protection problem caused by the increasingly serious automobile exhaust emission, automobile manufacturers begin to develop new energy automobile technology with great strength. To new forms of energy electric automobile, along with the continuous charge-discharge of the battery on the vehicle, the difference between the electric core of on-vehicle battery module slowly reflects, consequently, in order to guarantee the security of vehicle battery module, need detect the state of battery module.
In the prior art, the voltage difference between the battery cells of the battery module in the charging state is usually monitored, and if the voltage difference between the battery cells is greater than a preset threshold value, the state of the battery module is determined to be abnormal.
However, when the battery module is in a charging state, the voltage value of the battery cell may float to some extent, and if the state of the battery module is detected based on the prior art, a false alarm or a false alarm may occur, which may result in a low reliability of the state detection result.
Disclosure of Invention
The application provides a battery module state detection method, a battery module state detection device, electronic equipment and a storage medium, and aims to overcome the defects of low reliability and the like of state detection obtained in the prior art.
The first aspect of the present application provides a method for detecting a state of a battery module, including:
acquiring a plurality of data sets to be detected; the data set to be detected comprises charging data of a battery module to be detected in a preset detection period, wherein the charging data comprises voltage values of all battery cells in the battery module at each moment;
determining the maximum voltage difference value between the battery cores of the battery module in each detection period according to each data set to be detected;
and determining the state detection result of the battery module according to the maximum voltage difference value change condition between the battery cores in the adjacent detection periods.
Optionally, determining a state detection result of the battery module according to a maximum voltage difference value variation condition between the battery cells in the adjacent detection periods includes:
judging whether the change value of the maximum pressure difference value between the battery cores in the adjacent detection periods reaches a preset change threshold value or not;
if so, acquiring the occurrence time of the maximum voltage difference value between the battery cores of the adjacent detection periods, and determining the state detection result of the battery module according to the variation value of the maximum voltage difference value between the battery cores of the adjacent detection periods and the occurrence time of the maximum voltage difference value between the battery cores.
Optionally, the determining, according to the variation value of the maximum voltage difference between the electric cores in the adjacent detection periods and the occurrence time of the maximum voltage difference between the electric cores, a state detection result of the battery module includes:
determining the time length of the pressure difference change according to the occurrence time of the maximum pressure difference value between the battery cores in the adjacent detection periods;
determining the pressure difference change rate of the battery module according to the ratio of the change value of the maximum pressure difference value between the battery cores in the adjacent detection periods to the pressure difference change duration;
judging whether the pressure difference change rate is larger than a preset change rate threshold value or not;
and if so, determining that the state detection result of the battery module is abnormal.
Optionally, the method further includes:
and when the variation value of the maximum pressure difference value between the battery cores in the adjacent detection periods does not reach a preset variation threshold value, or when the pressure difference variation rate is not greater than a preset variation rate threshold value, determining that the state detection result of the battery module is normal.
Optionally, when it is determined that the state detection result of the battery module is abnormal, the method further includes:
and generating alarm information of the battery module, wherein the alarm information comprises abnormal occurrence time.
Optionally, the acquiring a plurality of data sets to be detected includes:
acquiring charging data of each battery cell of a battery module to be detected in any charging period;
and according to a preset detection period, carrying out set division on the charging data so as to divide the charging data into a plurality of data sets to be detected.
Optionally, the set division of the charging data according to a preset detection period includes:
acquiring the charging amount of the battery module at each moment in the charging period;
determining a time period of the battery module in a stable state according to the charging amount of the battery module at each moment in the charging cycle;
taking the charging data in the time period as target charging data;
and according to a preset detection period, carrying out set division on the target charging data.
This application second aspect provides a battery module state detection device, includes:
the acquisition module acquires a plurality of data sets to be detected; the data set to be detected comprises charging data of a battery module to be detected in a preset detection period, wherein the charging data comprises voltage values of all battery cells in the battery module at each moment;
the determining module is used for determining the maximum voltage difference value between the battery cores of the battery module in each detection period according to each data set to be detected;
and the detection module is used for determining the state detection result of the battery module according to the maximum pressure difference value change condition between the battery cores in the adjacent detection periods.
Optionally, the detection module is specifically configured to:
judging whether the change value of the maximum pressure difference value between the battery cores in the adjacent detection periods reaches a preset change threshold value or not;
if so, acquiring the occurrence time of the maximum voltage difference value between the battery cores of the adjacent detection periods, and determining the state detection result of the battery module according to the variation value of the maximum voltage difference value between the battery cores of the adjacent detection periods and the occurrence time of the maximum voltage difference value between the battery cores.
Optionally, the detection module is specifically configured to:
determining the time length of the pressure difference change according to the occurrence time of the maximum pressure difference value between the battery cores in the adjacent detection periods;
determining the pressure difference change rate of the battery module according to the ratio of the change value of the maximum pressure difference value between the battery cores in the adjacent detection periods to the pressure difference change duration;
judging whether the pressure difference change rate is larger than a preset change rate threshold value or not;
and if so, determining that the state detection result of the battery module is abnormal.
Optionally, the detection module is further configured to:
and when the variation value of the maximum pressure difference value between the battery cores in the adjacent detection periods does not reach a preset variation threshold value, or when the pressure difference variation rate is not greater than a preset variation rate threshold value, determining that the state detection result of the battery module is normal.
Optionally, when it is determined that the state detection result of the battery module is abnormal, the detection module is further configured to:
and generating alarm information of the battery module, wherein the alarm information comprises abnormal occurrence time.
Optionally, the obtaining module is specifically configured to:
acquiring charging data of each battery cell of a battery module to be detected in any charging period;
and according to a preset detection period, carrying out set division on the charging data so as to divide the charging data into a plurality of data sets to be detected.
Optionally, the obtaining module is specifically configured to:
acquiring the charging amount of the battery module at each moment in the charging period;
determining a time period of the battery module in a stable state according to the charging amount of the battery module at each moment in the charging cycle;
taking the charging data in the time period as target charging data;
and according to a preset detection period, carrying out set division on the target charging data.
A third aspect of the present application provides an electronic device, comprising: at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executes computer-executable instructions stored by the memory to cause the at least one processor to perform the method as set forth in the first aspect above and in various possible designs of the first aspect.
A fourth aspect of the present application provides a computer-readable storage medium having stored thereon computer-executable instructions that, when executed by a processor, implement a method as set forth in the first aspect and various possible designs of the first aspect.
This application technical scheme has following advantage:
the application provides a battery module state detection method, a device, an electronic device and a storage medium, wherein the method comprises the following steps: acquiring a plurality of data sets to be detected; the data set to be detected comprises charging data of the battery module to be detected in a preset detection period, wherein the charging data comprises voltage values of all battery cells in the battery module at each moment; determining the maximum voltage difference value between the battery cores of the battery module in each detection period according to each data set to be detected; and determining the state detection result of the battery module according to the maximum voltage difference value change condition between the battery cores of the adjacent detection periods. According to the method provided by the scheme, the state detection result of the battery module is determined according to the voltage change condition of the battery cell in the charging state, which is reflected by the maximum voltage difference value change condition between the battery cells in the adjacent detection periods, so that the objectivity of state detection is ensured, the influence of the maximum voltage difference value fluctuation condition between the battery cells on the state detection result is also considered, and the reliability of the state detection result is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art according to these drawings.
Fig. 1 is a schematic structural diagram of a battery module state detection system according to an embodiment of the present disclosure;
fig. 2 is a schematic flow chart illustrating a method for detecting a state of a battery module according to an embodiment of the present disclosure;
fig. 3 is a schematic flowchart of an exemplary method for detecting a state of a battery module according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a battery module state detection device according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the following examples, "plurality" means two or more unless specifically limited otherwise.
The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present invention will be described below with reference to the accompanying drawings.
First, a structure of a battery module state detection system based on the present application will be described:
the battery module state detection method and device, the electronic device and the storage medium are suitable for state detection of the battery module on the new energy electric vehicle. As shown in fig. 1, a schematic structural diagram of a battery module state detection system according to an embodiment of the present invention mainly includes a battery module, a data storage device, and a battery module state detection device, where historical charging data of the battery module is stored in the data storage device. Specifically, the battery module state detection device acquires charging data from the data storage device, and determines the state detection result of the battery module according to the acquired charging data.
The embodiment of the application provides a battery module state detection method, which is used for detecting the state of a battery module on a new energy electric automobile. The execution subject of the embodiment of the present application is an electronic device, such as a server, a desktop computer, a notebook computer, a tablet computer, and other electronic devices that can be used for analyzing the charging data of the battery module.
As shown in fig. 2, a schematic flow chart of a method for detecting a state of a battery module provided in the embodiment of the present application is shown, where the method includes:
The data set to be detected comprises charging data of the battery module to be detected in a preset detection period, and the charging data comprises voltage values of each battery cell in the battery module at each moment.
It should be noted that a battery module includes a plurality of battery cells, and the voltage difference value between the battery cells means that each battery in the battery module is at a certain timeThe differential pressure value between the cells. For example, if the battery module includes 3 battery cells, which are a first battery cell, a second battery cell, and a third battery cell, a voltage difference V between the battery cells at a certain time between the first battery cell and the second battery cell may be obtained1-V2Voltage difference V between cells between first cell and third cell1-V3Voltage difference V between cells between second cell and third cell2-V3。
Specifically, the data sets to be detected are divided according to a detection period, and for each data set to be detected, the voltage difference value between the battery cells at each time in the detection period can be calculated according to the time corresponding to the charging data, so that the maximum voltage difference value between the battery cells in the detection period is determined.
And 203, determining a state detection result of the battery module according to the maximum voltage difference value change condition between the battery cores in the adjacent detection periods.
It should be noted that the adjacent detection periods specifically refer to two adjacent detection periods, and the two detection periods are divided according to time and can be a first detection period with a time sequence before and a second detection period with a time sequence after.
Specifically, the state detection result of the battery module may be determined according to a variation value or a variation rate between the maximum voltage difference value between the cells in the second detection period and the maximum voltage difference value between the cells in the first detection period. Wherein, the state detection result of the battery module is divided into abnormal and normal.
Specifically, in an embodiment, in order to further improve the reliability of the state detection result, determining the state detection result of the battery module according to the maximum voltage difference value variation condition between the battery cells in the adjacent detection periods includes:
step 2031, judging whether the variation value of the maximum pressure difference value between the cells in the adjacent detection periods reaches a preset variation threshold value;
step 2032, if yes, acquiring the occurrence time of the maximum voltage difference value between the cells in the adjacent detection periods, and determining the state detection result of the battery module according to the variation value of the maximum voltage difference value between the cells in the adjacent detection periods and the occurrence time of the maximum voltage difference value between the cells.
It should be noted that the variation value of the maximum voltage difference value between the battery cells in the adjacent detection periods specifically refers to the difference value between the maximum voltage difference values between the battery cells in the two detection periods, and the variation condition of the maximum voltage difference value between the battery cells in the two periods of the battery module is reflected.
Illustratively, if the variation value Δ V1 of the maximum voltage difference value between the battery cells in adjacent detection periods is greater than or equal to 6mv, that is, a preset variation threshold value (6mv) is reached, the variation rate between the maximum voltage difference values between the battery cells of the battery module is analyzed by combining the occurrence moments of the maximum voltage difference values between the two battery cells, and finally, the state detection result of the battery module is determined according to the obtained variation rate.
Specifically, in an embodiment, the pressure difference change duration may be determined according to the occurrence time of the maximum pressure difference value between the battery cells in the adjacent detection periods; determining the differential pressure change rate of the battery module according to the ratio of the change value of the maximum differential pressure between the battery cores in the adjacent detection periods to the differential pressure change duration; judging whether the pressure difference change rate is larger than a preset change rate threshold value or not; if so, determining that the state detection result of the battery module is abnormal.
Specifically, the differential pressure change rate may be calculated according to the following formula:
δ＝α*(ΔV1/Δt1)
where δ represents a differential pressure change rate, Δ t1 represents a differential pressure change duration, specifically, a difference between occurrence timings of maximum voltage difference values between the cells in adjacent detection periods, and α represents a weighting coefficient, for example, when a current detection period is 1 hour, α may be set to 24, a corresponding change rate threshold value at this time is 1mv/d, and d represents a day.
Specifically, when the variation reaches and predetermines the variation threshold value, can tentatively judge that this battery module probably has unusually, in order to avoid appearing the alert condition of wrong report, the rate of change of maximum pressure difference value between this application embodiment further analysis electric core, if the rate of change is less this moment, is less than predetermined variation threshold value promptly, and the state that shows electric core is comparatively stable, then still confirms this battery module as normal condition.
Further, in an embodiment, when it is determined that the state detection result of the battery module is abnormal, the method further includes:
generate the alarm information of battery module, alarm information includes unusual emergence time.
It should be noted that the occurrence time of the abnormality corresponds to the occurrence time of the maximum voltage difference value between the battery cells in the second detection period.
On the contrary, in an embodiment, when the variation value of the maximum voltage difference between the battery cells in the adjacent detection periods does not reach the preset variation threshold, or when the voltage difference variation rate is not greater than the preset variation rate threshold, it is determined that the state detection result of the battery module is normal.
If the state detection result of the battery module is normal, the detection result is not reported.
On the basis of the foregoing embodiment, as an implementable manner, on the basis of the foregoing embodiment, in an embodiment, acquiring a plurality of data sets to be detected includes:
step 2011, acquiring charging data of each battery cell of the battery module to be detected in any charging cycle;
step 2012, the charging data is subjected to set division according to a preset detection period, so as to divide the charging data into a plurality of data sets to be detected.
The charging period can be day, the charging data of the battery module to be detected in the previous day can be acquired specifically, the detection period can be hour, the detection period can be 1 hour, and the acquired charging data of the previous day is divided into a plurality of data sets to be detected.
Specifically, in an embodiment, since the state of the battery module just entering the charging state is unstable, in order to further ensure the reliability of the state detection result, the charging amount of the battery module at each time in the charging cycle may be acquired; determining the time period of the battery module in a stable state according to the charging amount of the battery module at each moment in the charging period; taking the charging data in the time period as target charging data; and according to a preset detection period, carrying out set division on the target charging data.
Specifically, when the charged amount of the battery module is in the [ 80%, 90% ] interval, it may be determined that the battery module is in the stable state, and thus the period of time during which the condition is satisfied may be determined as the period of time during which the battery module is in the stable state.
Exemplarily, as shown in fig. 3, a schematic flow chart of an exemplary battery module state detection method provided in the embodiment of the present application is shown. The battery cell in the battery module sends a message to the vehicle controller in the whole life cycle, so that whether the battery cell is in a charging state can be judged by obtaining the message sent by the battery module, and specifically, two fields, namely a charging identifier and a current, in the message can be searched for, for example, when the charging state of one message is charging, the charging capacity of the battery module is in an interval of [ 80%, 90% ], the current is less than 0 and the current is greater than-51.480 (less than 0.33C), the message can be determined to be the message sent when the battery cell is in the charging state. It should be noted that the current of the battery cell during the charging process is a negative number, which is less than 0 and greater than-51.480. Then, the first charging data is found and is made to be first charging cycle data, each frame of charging data after the first charging cycle data and the first charging cycle data of the first charging cycle within one hour (detection period), the next data of the second charging cycle, which is the first data and the last data of the first charging cycle, is first charging cycle 2, then the charging data after the first charging cycle 2 within one hour is the data of the second charging cycle, and so on, the charging cycle data (to-be-detected data set) can be divided for each frame of charging data. The method for detecting the state of the battery module provided in the embodiment of the present application may be specifically implemented based on javaspark, and the method shown in fig. 3 is an exemplary implementation manner of the method shown in fig. 2, and the two implementation principles are the same and are not described herein again.
According to the battery module state detection method provided by the embodiment of the application, a plurality of data sets to be detected are obtained; the data set to be detected comprises charging data of the battery module to be detected in a preset detection period, wherein the charging data comprises voltage values of all battery cells in the battery module at each moment; determining the maximum voltage difference value between the battery cores of the battery module in each detection period according to each data set to be detected; and determining the state detection result of the battery module according to the maximum voltage difference value change condition between the battery cores of the adjacent detection periods. The state detection result of the battery module is determined according to the voltage change condition of the battery cell in the charging state reflected by the maximum voltage difference value change condition between the battery cells in the adjacent detection periods, so that the objectivity of state detection is ensured, the influence of the maximum voltage difference value fluctuation condition between the battery cells on the state detection result is also considered, and the reliability of the state detection result is improved. And the condition of false alarm is avoided and the reliability of the condition detection result is further improved by calculating the pressure difference change rate of the adjacent detection periods and further detecting the condition of the battery module according to the obtained pressure difference change rate.
The embodiment of the application provides a battery module state detection device, which is used for executing the battery module state detection method provided by the embodiment.
Fig. 4 is a schematic structural diagram of a battery module state detection device according to an embodiment of the present disclosure. The battery module state detection apparatus 40 includes an acquisition module 401, a determination module 402, and a detection module 403.
The acquisition module acquires a plurality of data sets to be detected; the data set to be detected comprises charging data of the battery module to be detected in a preset detection period, wherein the charging data comprises voltage values of all battery cells in the battery module at each moment; the determining module is used for determining the maximum voltage difference value between the battery cores of the battery module in each detection period according to each data set to be detected; and the detection module is used for determining the state detection result of the battery module according to the maximum pressure difference value change condition between the battery cores of the adjacent detection periods.
Specifically, in an embodiment, the detection module is specifically configured to:
judging whether the change value of the maximum pressure difference value between the battery cores in the adjacent detection periods reaches a preset change threshold value or not;
if so, acquiring the occurrence time of the maximum voltage difference value between the battery cores of the adjacent detection periods, and determining the state detection result of the battery module according to the variation value of the maximum voltage difference value between the battery cores of the adjacent detection periods and the occurrence time of the maximum voltage difference value between the battery cores.
Specifically, in an embodiment, the detection module is specifically configured to:
determining the time length of the pressure difference change according to the occurrence time of the maximum pressure difference value between the battery cores in the adjacent detection periods;
determining the differential pressure change rate of the battery module according to the ratio of the change value of the maximum differential pressure between the battery cores in the adjacent detection periods to the differential pressure change duration;
judging whether the pressure difference change rate is larger than a preset change rate threshold value or not;
if so, determining that the state detection result of the battery module is abnormal.
Specifically, in an embodiment, the detection module is further configured to:
when the variation value of the maximum pressure difference value between the battery cores in the adjacent detection periods does not reach the preset variation threshold value, or when the pressure difference variation rate is not greater than the preset variation rate threshold value, the state detection result of the battery module is determined to be normal.
Specifically, in an embodiment, when it is determined that the state detection result of the battery module is abnormal, the detection module is further configured to:
generate the alarm information of battery module, alarm information includes unusual emergence time.
Specifically, in an embodiment, the obtaining module is specifically configured to:
acquiring charging data of each battery cell of a battery module to be detected in any charging period;
and according to a preset detection period, carrying out set division on the charging data so as to divide the charging data into a plurality of data sets to be detected.
Specifically, in an embodiment, the obtaining module is specifically configured to:
acquiring the charging amount of the battery module at each moment in the charging period;
determining the time period of the battery module in a stable state according to the charging amount of the battery module at each moment in the charging period;
taking the charging data in the time period as target charging data;
and according to a preset detection period, carrying out set division on the target charging data.
With regard to the battery module state detection apparatus in the present embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment related to the method, and will not be described in detail here.
The battery module state detection device provided by the embodiment of the application is used for executing the battery module state detection method provided by the embodiment, and the implementation manner and the principle of the battery module state detection device are the same and are not repeated.
The embodiment of the application provides electronic equipment for executing the battery module state detection method provided by the embodiment.
Fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application. The electronic device 50 includes: at least one processor 51 and memory 52;
the memory stores computer-executable instructions; the at least one processor executes the computer-executable instructions stored in the memory, so that the at least one processor executes the battery module state detection method provided by the above embodiment.
The electronic device provided by the embodiment of the application is used for executing the battery module state detection method provided by the embodiment, and the implementation manner and the principle of the electronic device are the same and are not repeated.
The embodiment of the application provides a computer-readable storage medium, wherein a computer execution instruction is stored in the computer-readable storage medium, and when a processor executes the computer execution instruction, the battery module state detection method provided by any one of the above embodiments is implemented.
The storage medium including the computer executable instructions according to the embodiment of the present application may be used to store the computer executable instructions of the battery module state detection method provided in the foregoing embodiment, and the implementation manner and the principle thereof are the same and are not described again.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to execute some steps of the methods according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
It is obvious to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be performed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to perform all or part of the above described functions. For the specific working process of the device described above, reference may be made to the corresponding process in the foregoing method embodiment, which is not described herein again.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A method for detecting the state of a battery module is characterized by comprising the following steps:
acquiring a plurality of data sets to be detected; the data set to be detected comprises charging data of a battery module to be detected in a preset detection period, wherein the charging data comprises voltage values of all battery cells in the battery module at each moment;
determining the maximum voltage difference value between the battery cores of the battery module in each detection period according to each data set to be detected;
and determining the state detection result of the battery module according to the maximum voltage difference value change condition between the battery cores in the adjacent detection periods.
2. The method of claim 1, wherein the determining the state detection result of the battery module according to the variation of the maximum voltage difference value between the battery cells in the adjacent detection periods comprises:
judging whether the change value of the maximum pressure difference value between the battery cores in the adjacent detection periods reaches a preset change threshold value or not;
if so, acquiring the occurrence time of the maximum voltage difference value between the battery cores of the adjacent detection periods, and determining the state detection result of the battery module according to the variation value of the maximum voltage difference value between the battery cores of the adjacent detection periods and the occurrence time of the maximum voltage difference value between the battery cores.
3. The method of claim 2, wherein determining the state detection result of the battery module according to the variation value of the maximum voltage difference value between the cells in the adjacent detection periods and the occurrence time of the maximum voltage difference value between the cells comprises:
determining the time length of the pressure difference change according to the occurrence time of the maximum pressure difference value between the battery cores in the adjacent detection periods;
determining the pressure difference change rate of the battery module according to the ratio of the change value of the maximum pressure difference value between the battery cores in the adjacent detection periods to the pressure difference change duration;
judging whether the pressure difference change rate is larger than a preset change rate threshold value or not;
and if so, determining that the state detection result of the battery module is abnormal.
4. The method of claim 3, further comprising:
and when the variation value of the maximum pressure difference value between the battery cores in the adjacent detection periods does not reach a preset variation threshold value, or when the pressure difference variation rate is not greater than a preset variation rate threshold value, determining that the state detection result of the battery module is normal.
5. The method according to claim 3, wherein when it is determined that the state detection result of the battery module is abnormal, the method further comprises:
and generating alarm information of the battery module, wherein the alarm information comprises abnormal occurrence time.
6. The method of claim 1, wherein the acquiring a plurality of data sets to be detected comprises:
acquiring charging data of each battery cell of a battery module to be detected in any charging period;
and according to a preset detection period, carrying out set division on the charging data so as to divide the charging data into a plurality of data sets to be detected.
7. The method of claim 6, wherein the grouping the charging data according to a preset detection period comprises:
acquiring the charging amount of the battery module at each moment in the charging period;
determining a time period of the battery module in a stable state according to the charging amount of the battery module at each moment in the charging cycle;
taking the charging data in the time period as target charging data;
and according to a preset detection period, carrying out set division on the target charging data.
8. The utility model provides a battery module state detection device which characterized in that includes:
the acquisition module acquires a plurality of data sets to be detected; the data set to be detected comprises charging data of a battery module to be detected in a preset detection period, wherein the charging data comprises voltage values of all battery cells in the battery module at each moment;
the determining module is used for determining the maximum voltage difference value between the battery cores of the battery module in each detection period according to each data set to be detected;
and the detection module is used for determining the state detection result of the battery module according to the maximum pressure difference value change condition between the battery cores in the adjacent detection periods.
9. An electronic device, comprising: at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executing the computer-executable instructions stored by the memory causes the at least one processor to perform the method of any of claims 1-7.
10. A computer-readable storage medium having computer-executable instructions stored thereon which, when executed by a processor, implement the method of any one of claims 1 to 7.
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