CN117930007A - Method and device for identifying serial-parallel connection relation of battery units - Google Patents
Method and device for identifying serial-parallel connection relation of battery units Download PDFInfo
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Abstract
The invention provides a method and a device for identifying a serial-parallel connection relationship of battery units, wherein the method for identifying the serial-parallel connection relationship of the battery units comprises the following steps: starting a battery system, and acquiring circuit unit parameters of each battery unit in the battery system; clustering the acquired unit circuit parameters to obtain unit clustering parameters; based on each unit clustering parameter and a preset clustering criterion, acquiring the unit clustering parameters meeting the clustering criterion, and determining the serial-parallel connection relation of the battery units corresponding to the unit clustering parameters according to the mapping relation between the clustering criterion and the grouping relation. Battery management efficiency can be improved.
Description
Technical Field
The invention relates to the technical field of battery management, in particular to a method and a device for identifying a serial-parallel connection relationship of battery units.
Background
In the practical use process of the battery units in the battery system, due to space limitation, the battery units forming the same voltage level can have different series-parallel connection modes, and the series-parallel connection modes are various. Although the sequence of serial-parallel connection does not affect the external electrical characteristics of the battery system, different connection modes and connection sequences affect the output current, charge-discharge current and battery life of each battery unit, thereby providing challenges for battery management. The battery management is to perform balance control, state of charge monitoring and health state management on each battery unit, and needs to be dynamically adjusted based on the connection mode of each battery unit in the battery system, so that the identification of the connection mode of the battery units in series-parallel connection is a necessary key technology for performing battery management, and the improvement of the battery management efficiency needs to be based on the accurately identified connection mode of the battery units in series-parallel connection.
Disclosure of Invention
Accordingly, the present invention is directed to a method and apparatus for identifying a serial-parallel relationship of battery cells, so as to improve battery management efficiency.
In a first aspect, an embodiment of the present invention provides a method for identifying a serial-parallel relationship of battery cells, including:
starting a battery system, and acquiring circuit unit parameters of each battery unit in the battery system;
clustering the acquired unit circuit parameters to obtain unit clustering parameters;
Based on each unit clustering parameter and a preset clustering criterion, acquiring the unit clustering parameters meeting the clustering criterion, and determining the serial-parallel connection relation of the battery units corresponding to the unit clustering parameters according to the mapping relation between the clustering criterion and the grouping relation.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where the unit circuit parameters include a unit circuit voltage and a unit circuit current, and clustering the acquired unit circuit parameters to obtain unit clustering parameters, including:
Clustering the acquired unit circuit voltages to obtain one or more unit clustering voltages; and
And clustering the acquired unit circuit currents to obtain one or more unit clustering currents.
With reference to the first possible implementation manner of the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, where the clustering criteria includes a current clustering criterion and a voltage clustering criterion, the obtaining, based on each unit clustering parameter and a preset clustering criterion, a unit clustering parameter that meets the clustering criterion, and determining, according to a mapping relationship between the clustering criterion and a grouping relationship, a serial-parallel relationship of a battery unit corresponding to the unit clustering parameter includes:
Judging whether all the unit clustering currents meet a preset current clustering criterion from the obtained unit clustering currents, if so, determining that all battery units corresponding to the same unit clustering current are in a series connection relationship, and the different unit clustering currents are in a parallel connection relationship;
If any unit clustering current does not meet the current clustering criterion, judging whether all unit clustering voltages meet the preset voltage clustering criterion from the obtained unit clustering voltages, and if so, determining that all battery units corresponding to the same unit clustering voltage are in a parallel connection relationship, and the different unit clustering voltages are in a series connection relationship.
With reference to the second possible implementation manner of the first aspect, the embodiment of the present invention provides a third possible implementation manner of the first aspect, wherein the determining, from the obtained unit cluster currents, whether all unit cluster currents meet a preset current cluster criterion includes:
Aiming at each unit clustering current, acquiring a clustering battery unit corresponding to the unit clustering current and the number of the clustering battery units;
calculating various total current deviations of the clustered battery units corresponding to the clustering currents of the units;
calculating various total voltage deviations of the clustered battery cells corresponding to the clustering currents of the cells;
if the various total current deviations are smaller than the first current deviation threshold value, the various total voltage deviations are smaller than the first voltage deviation threshold value, and the number of the clustered battery units corresponding to the clustered currents of the units is equal;
And calculating unit current deviation among the battery units in each clustered battery unit according to each clustered battery unit, and determining that all the unit clustering currents meet the current clustering criterion if each unit current deviation is smaller than a preset second current deviation threshold value.
With reference to the second possible implementation manner of the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, where the following is a third possible implementation manner of the first aspect
From the obtained unit clustering voltages, judging whether all the unit clustering voltages meet unit clustering currents of a preset voltage clustering criterion or not, wherein the unit clustering current comprises the following steps:
Aiming at each unit clustering voltage, acquiring a clustering battery unit corresponding to the unit clustering voltage and the number of the clustering battery units;
calculating various total current deviations of the clustered battery cells corresponding to the clustering voltages of the cells;
calculating various total voltage deviations of the clustered battery cells corresponding to the clustering voltages of the cells;
if the various total current deviations are smaller than a third current deviation threshold value, the various total voltage deviations are smaller than a second voltage deviation threshold value, and the number of the clustered battery units corresponding to the voltage clustering parameters of the units is equal;
And calculating the unit voltage deviation among the battery units in each clustered battery unit according to each clustered battery unit, and determining that all the unit clustering voltages meet the voltage clustering criterion if each unit voltage deviation is smaller than a preset third voltage deviation threshold value.
With reference to the first possible implementation manner of the first aspect, an embodiment of the present invention provides a fifth possible implementation manner of the first aspect, where the clustering criteria includes a current clustering criterion and a voltage clustering criterion, the obtaining, based on each unit clustering parameter and a preset clustering criterion, a unit clustering parameter that meets the clustering criterion, and determining, according to a mapping relationship between the clustering criterion and a grouping relationship, a serial-parallel relationship of a battery unit corresponding to the unit clustering parameter includes:
Judging whether all the unit clustering voltages meet a preset voltage clustering criterion from the obtained unit clustering voltages, if so, determining that all battery units corresponding to the same unit clustering voltage are in a parallel connection relationship, and the different unit clustering voltages are in a series connection relationship;
if any unit clustering voltage does not meet the voltage clustering criterion, judging whether all unit clustering currents meet the preset current clustering criterion in the obtained unit clustering currents, and if so, determining that each battery unit corresponding to the same extracted unit clustering current is in a series connection relationship, and the different unit clustering currents are in a parallel connection relationship.
With reference to the first aspect, the first possible implementation manner of the first aspect, and any one of the first possible implementation manner to the fifth possible implementation manner of the first aspect, the embodiment of the present invention provides a sixth possible implementation manner of the first aspect, where the method further includes:
Acquiring circuit parameters of each battery in each battery unit aiming at each battery unit;
clustering the acquired circuit parameters to obtain clustering parameters of each battery;
and if all the battery clustering parameters meet the preset battery clustering criteria, determining the serial-parallel connection relation of the batteries corresponding to all the battery clustering parameters according to the mapping relation between the battery clustering criteria and the grouping relation.
In a second aspect, an embodiment of the present invention further provides an apparatus for identifying a serial-parallel relationship of battery cells, including:
The parameter acquisition module is used for starting the battery system and acquiring circuit unit parameters of each battery unit in the battery system;
the clustering module is used for clustering the acquired unit circuit parameters to obtain unit clustering parameters;
And the relation determining module is used for acquiring the unit clustering parameters meeting the clustering criteria based on the unit clustering parameters and preset clustering criteria, and determining the serial-parallel relation of the battery units corresponding to the unit clustering parameters according to the mapping relation between the clustering criteria and the group relation.
In a third aspect, an embodiment of the present application provides a computer device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor implements the steps of the method described above when executing the computer program.
In a fourth aspect, embodiments of the present application provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method described above.
According to the method and the device for identifying the serial-parallel connection relation of the battery units, the circuit unit parameters of each battery unit in the battery system are obtained by starting the battery system; clustering the acquired unit circuit parameters to obtain unit clustering parameters; based on each unit clustering parameter and a preset clustering criterion, acquiring the unit clustering parameters meeting the clustering criterion, and determining the serial-parallel connection relation of the battery units corresponding to the unit clustering parameters according to the mapping relation between the clustering criterion and the grouping relation. In this way, the cluster analysis is carried out on the circuit parameters, and the serial-parallel connection relation of the battery units is given according to the cluster analysis result and the cluster criterion, so that efficient battery management can be carried out according to the identified serial-parallel connection relation.
In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a method for identifying a serial-parallel relationship of battery cells according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a method for identifying a series-parallel relationship based on current according to an embodiment of the present invention;
Fig. 3 is a schematic diagram showing a group structure of a serial-then-parallel battery system according to an embodiment of the present invention;
FIG. 4 is a schematic flow chart of a method for identifying a series-parallel relationship based on voltage according to an embodiment of the present invention;
Fig. 5 is a schematic diagram showing a group structure of a battery system of a serial-first-parallel-last-series battery system according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a device for identifying a serial-parallel relationship of battery cells according to an embodiment of the present invention;
Fig. 7 is a schematic structural diagram of a computer device 700 according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
The embodiment of the invention provides a method and a device for identifying a serial-parallel connection relationship of battery units, and the method and the device are described below through the embodiment.
Fig. 1 is a schematic flow chart of a method for identifying a serial-parallel relationship of battery cells according to an embodiment of the present invention. As shown in fig. 1, the method includes:
step 101, starting a battery system, and acquiring circuit unit parameters of each battery unit in the battery system;
In the embodiment of the invention, battery management is performed by using the battery management units (BMU, battery Management Unit) and the serial-parallel connection relation of each battery unit in the battery system is identified, and when the battery management unit performs battery management, the serial-parallel connection composition (connection) mode of each battery unit in the battery system is accurately identified.
In an embodiment of the present invention, in order to obtain the serial-parallel connection relationship (in a group manner) of the battery units, as an optional embodiment, before starting the battery system, the method further includes:
each battery cell of the battery system and each battery in the battery cell are individually numbered.
In the embodiment of the present invention, as an optional embodiment, the battery unit is numbered, for example, it may be: c1 and C2 … Cn.
In the embodiment of the invention, after the battery system is started, the unit circuit parameters of each battery unit in the battery system are collected. As an alternative embodiment, the unit circuit parameters include, but are not limited to: voltage, current.
Step 102, clustering the acquired unit circuit parameters to obtain unit clustering parameters;
In the embodiment of the invention, as an optional embodiment, the collected unit circuit parameters are clustered, that is, the collected unit circuit parameters are clustered based on all the collected unit circuit parameters, and the unit circuit parameters are converged at a central point according to a preset clustering algorithm to obtain one or more unit clustering parameters.
In the embodiment of the present invention, as an optional embodiment, clustering is performed based on all the collected unit circuit parameters, and may be based on all the collected unit circuit parameters, so as to determine a central circuit parameter (unit clustering parameter) so that the variance between each unit circuit parameter and the central circuit parameter is minimum.
In the embodiment of the present invention, as an optional embodiment, the unit circuit parameters include a unit circuit voltage and a unit circuit current, and the clustering of the acquired unit circuit parameters is performed to obtain unit clustering parameters, including:
Clustering the acquired unit circuit voltages to obtain one or more unit clustering voltages; and
And clustering the acquired unit circuit currents to obtain one or more unit clustering currents.
And 103, obtaining unit clustering parameters meeting the clustering criteria based on the unit clustering parameters and preset clustering criteria, and determining the serial-parallel connection relation of the battery units corresponding to the unit clustering parameters according to the mapping relation between the clustering criteria and the grouping relation.
In the embodiment of the present invention, as an optional embodiment, the clustering criteria include a current clustering criterion and a voltage clustering criterion, and based on each unit clustering parameter and a preset clustering criterion, obtaining a unit clustering parameter meeting the clustering criterion, and determining a serial-parallel relationship of a battery unit corresponding to the unit clustering parameter according to a mapping relationship between the clustering criterion and a group relationship, where the determining includes:
Judging whether all the unit clustering currents meet a preset current clustering criterion from the obtained unit clustering currents, if so, determining that all battery units corresponding to the same unit clustering current are in a series connection relationship, and the different unit clustering currents are in a parallel connection relationship;
If any unit clustering current does not meet the current clustering criterion, judging whether all unit clustering voltages meet the preset voltage clustering criterion from the obtained unit clustering voltages, and if so, determining that all battery units corresponding to the same unit clustering voltage are in a parallel connection relationship, and the different unit clustering voltages are in a series connection relationship.
In the embodiment of the invention, the serial-parallel connection relation among the battery units is identified based on a current clustering criterion and a voltage clustering criterion, and each unit clustering current corresponds to one type of battery unit. As an optional embodiment, determining whether all unit clustering currents meet a preset current clustering criterion from the obtained unit clustering currents includes:
A11, aiming at each unit clustering current, acquiring a clustering battery unit corresponding to the unit clustering current and the number of the clustering battery units;
a12, calculating various total current deviations of the clustered battery cells corresponding to the clustered currents of the cells;
a13, calculating various total voltage deviations of the clustered battery cells corresponding to the clustering currents of the cells;
a14, if the various total current deviations are smaller than a first current deviation threshold value, the various total voltage deviations are smaller than a first voltage deviation threshold value, and the number of clustered battery units corresponding to the clustered currents of the units is equal;
and A15, calculating unit current deviation among the battery units in each clustered battery unit according to each clustered battery unit, and determining that the unit clustering currents corresponding to all clustered battery units meet the current clustering criterion if each unit current deviation is smaller than a preset second current deviation threshold value.
In the embodiment of the invention, each unit clustering current corresponds to one type of battery unit, and if all types of battery units meet the following conditions: and if the total current deviation is smaller than a first current deviation threshold, the number of the battery units is equal or the error is within the error number range, the current deviation (unit current deviation) of the battery units in the class is smaller than a second current deviation threshold, and the total voltage deviation is smaller than a first voltage deviation threshold, determining that all the battery units meet the clustering criterion, and obtaining the battery system, wherein the battery units are connected in series and then in parallel to form a group, namely the battery units in the same class are connected in series, and the battery units in different classes are connected in parallel.
In the embodiment of the invention, the unit cells in the same category are renumbered, and the serial-parallel connection composition information is recorded and stored.
In the embodiment of the invention, as an optional embodiment, each type of total current deviation is the sum of all types of current deviations, wherein one type of current deviation is the mean value of the deviations of each battery unit in the class and the corresponding current clustering parameter of the class, and the unit current deviation is the deviation of the battery unit and the corresponding current clustering parameter of the battery unit. As another alternative embodiment, the deviations include, but are not limited to: arithmetic differences, mean square differences, etc.
In the embodiment of the invention, as another optional embodiment, if all types of total current deviation are not smaller than a first current deviation threshold, or all types of total voltage deviation are not smaller than a first voltage deviation threshold, or the number of clustered battery units corresponding to unit clustering currents is not equal, performing voltage clustering criterion matching.
In the embodiment of the present invention, as an optional embodiment, from the obtained unit clustering voltages, determining whether all unit clustering voltages satisfy a unit clustering current of a preset voltage clustering criterion includes:
a21, aiming at each unit clustering voltage, acquiring a clustering battery unit corresponding to the unit clustering voltage and the number of the clustering battery units;
a22, calculating various total current deviations of the clustered battery cells corresponding to the clustering voltages of the cells;
A23, calculating various total voltage deviations of the clustered battery cells corresponding to the clustering voltages of the cells;
A24, if the various total current deviations are smaller than a third current deviation threshold value, the various total voltage deviations are smaller than a second voltage deviation threshold value, and the number of the clustered battery units corresponding to the voltage clustering parameters of the units is equal;
And A25, calculating unit voltage deviation among the battery units in each clustered battery unit according to each clustered battery unit, and determining that all the unit clustering voltages meet the voltage clustering criterion if each unit voltage deviation is smaller than a preset third voltage deviation threshold value.
In the embodiment of the invention, various battery units meeting the voltage clustering criterion are connected in parallel and then connected in series to form a group, namely, the battery units of the type are connected in parallel, and the different types are connected in series. And renumbering the unit cells of the same class, and recording and storing serial-parallel composition information.
In an embodiment of the present invention, as another optional embodiment, the method further includes:
if the clustered battery units which do not meet the current clustering criterion or the voltage clustering criterion exist, sending the abnormal alarm information of the electric core to preset terminal equipment so as to check a battery system and repair potential risk hidden danger.
In the embodiment of the invention, as long as any clustering battery unit does not meet the current clustering criterion or the voltage clustering criterion, the battery system is indicated to be abnormal. As another alternative embodiment, the identifying of the serial-parallel relationship of the battery units according to the unit clustering voltage may be performed, the clustering criteria include a current clustering criterion and a voltage clustering criterion, the unit clustering parameters meeting the clustering criteria are obtained based on each unit clustering parameter and a preset clustering criterion, and the determining of the serial-parallel relationship of the battery units corresponding to the unit clustering parameters according to the mapping relationship between the clustering criteria and the group relationship includes:
Judging whether all the unit clustering voltages meet a preset voltage clustering criterion from the obtained unit clustering voltages, if so, determining that all battery units corresponding to the same unit clustering voltage are in a parallel connection relationship, and the different unit clustering voltages are in a series connection relationship;
If any unit clustering voltage does not meet the voltage clustering criterion, judging whether all unit clustering currents meet the preset current clustering criterion from the obtained unit clustering currents, and if so, determining that each battery unit corresponding to the same extracted unit clustering current is in a series connection relationship, and the different unit clustering currents are in a parallel connection relationship.
In the embodiment of the invention, whether the preset voltage clustering criterion is met or not and whether the preset current clustering criterion is met or not are judged, and the method is the same as the method.
In the embodiment of the present invention, after the serial-parallel connection identification is performed on the battery unit, the serial-parallel connection identification of the batteries in the battery unit may be performed according to a similar method, so as to be an optional embodiment, the method further includes:
Acquiring circuit parameters of each battery in each battery unit aiming at each battery unit;
clustering the acquired circuit parameters to obtain clustering parameters of each battery;
Based on each battery clustering parameter and a preset battery clustering criterion, if all the battery clustering parameters meet the battery clustering criterion, determining the serial-parallel connection relation of the batteries corresponding to all the battery clustering parameters according to the mapping relation between the battery clustering criterion and the grouping relation.
In the embodiment of the invention, the circuit parameters of each battery in the battery units are clustered by taking the battery units as units, and one battery unit corresponds to one clustering result.
In the embodiment of the present invention, as an optional embodiment, the battery clustering parameters include: based on each battery clustering parameter and a preset battery clustering criterion, if all the battery clustering parameters meet the preset battery clustering criterion, determining the serial-parallel connection relation of the batteries corresponding to all the battery clustering parameters according to the mapping relation between the battery clustering criterion and the grouping relation, wherein the serial-parallel connection relation comprises the following steps:
Judging whether all battery clustering currents meet a preset battery current clustering criterion or not from all obtained battery clustering currents according to each battery unit, if so, determining that all batteries corresponding to the same battery clustering current are in a series connection relationship, and determining that different battery clustering currents are in a parallel connection relationship;
If any battery clustering current does not meet the preset battery current clustering criterion, judging whether the battery clustering current meets the preset battery voltage clustering criterion or not from the battery clustering voltages, and if the battery clustering current does not meet the preset battery voltage clustering criterion, determining that all batteries corresponding to the same battery clustering voltage are in a parallel connection relationship, and determining that different battery clustering voltages are in a series connection relationship.
In the embodiment of the present invention, as an optional embodiment, determining whether all battery clustering currents meet a preset battery current clustering criterion includes:
B11, aiming at each battery clustering current, acquiring a clustering battery corresponding to the battery clustering current and the clustering battery number;
B12, calculating various total current deviations of clustered batteries corresponding to the clustered currents of the batteries;
b13, calculating various total voltage deviations of clustered batteries corresponding to the clustered currents of the batteries;
B14, if the various total current deviations are smaller than the fourth current deviation threshold value, the various total voltage deviations are smaller than the fourth voltage deviation threshold value, and the clustering battery numbers corresponding to the clustering currents of the batteries are equal;
and B15, calculating the battery current deviation among the batteries in each clustered battery according to each clustered battery, and determining that all the battery clustering currents meet the battery current clustering criterion if each battery current deviation is smaller than a preset fifth current deviation threshold value.
The method of the embodiment of the present invention will be described in detail below by way of several specific examples:
in the first embodiment, the battery unit is a single battery, and the identification is performed according to the current of the battery unit
In the embodiment of the present invention, the number of batteries included in the battery unit is 1, that is, the battery unit is a single battery, the current collected by each battery unit is clustered, and the current verification constraint is performed on the clustering result (clustered current), which includes but is not limited to: classifying the total deviation of current, classifying the number of various batteries obtained by classification and classifying the total voltage deviation.
FIG. 2 is a schematic flow chart of a method for identifying a series-parallel relationship based on current according to an embodiment of the present invention;
Fig. 3 is a schematic diagram showing a group structure of a serial-then-parallel battery system according to an embodiment of the present invention;
as shown in fig. 2 and 3, the method includes:
step 201, collecting the current of each battery unit;
step 202, clustering the currents of all battery units;
step 203, calculating the total deviation of the classified currents according to the clustering result obtained by clustering;
step 204, judging whether the total deviation of the classified currents is smaller than a first current deviation threshold, if yes, executing step 205, and if no, executing step 207;
Step 205, judging whether the clustering result meets the current verification constraint, if yes, executing step 206, and if no, executing step 207;
step 206, determining that each battery unit corresponding to the clustering result corresponding to the current verification constraint is in a series connection relationship, and the different clustering results are in a parallel connection relationship;
step 207, identifying a series-parallel relationship based on the voltage.
According to the embodiment of the invention, the serial-parallel connection relation of the batteries in the battery system can be obtained according to the clustering parameters, and the serial-parallel connection relation information is renumbered, recorded and stored for the battery units in the same category.
In the second embodiment, the battery unit is a single battery, and the identification is performed according to the voltage of the battery unit
In the embodiment of the invention, the battery unit is a single battery, the voltage is clustered, and the voltage verification constraint is performed on the clustered voltage, wherein the voltage verification constraint comprises but is not limited to: classifying the total deviation of voltage, classifying the number of various batteries obtained by classification and the deviation of various currents.
FIG. 4 is a schematic flow chart of a method for identifying a series-parallel relationship based on voltage according to an embodiment of the present invention;
Fig. 5 is a schematic diagram showing a group structure of a battery system of a serial-first-parallel-last-series battery system according to an embodiment of the present invention;
As shown in fig. 4 and 5, the method includes:
Step 401, collecting the voltage of each battery unit;
Step 402, clustering voltages of each battery unit;
step 403, calculating the total bias of the classification voltage according to the clustering result obtained by clustering;
Step 404, judging whether the total deviation of the classified voltages is smaller than a first voltage deviation threshold, if yes, executing step 405, and if no, executing step 407;
step 405, judging whether the clustering result meets the voltage verification constraint, if yes, executing step 406, and if no, executing step 407;
step 406, determining that each battery unit corresponding to the clustering result corresponding to the voltage verification constraint is in a parallel relationship, and the different clustering results are in a series relationship;
Step 407, identifying a series-parallel relationship based on the current.
In the embodiment of the invention, the serial-parallel connection composition mode of the battery units is obtained according to the clustering result, and the battery units of the same group of strings are renumbered and the serial-parallel connection composition information is recorded and stored.
In the third embodiment, the battery unit is a battery pack formed by connecting a plurality of batteries in series and parallel, and the identification is performed according to the current of the battery unit
In the embodiment of the invention, the battery unit comprises a plurality of batteries, the plurality of batteries are connected in series or in parallel or in series-parallel, namely, the battery unit is a battery pack formed by connecting the plurality of batteries in series and parallel, and the identification process comprises the following steps: and identifying the serial-parallel connection relation of each battery in the battery unit, and identifying the serial-parallel connection relation of the battery unit. Wherein,
For a battery pack, a manufacturer may indicate information of a serial-parallel relationship of each battery in the battery pack on the battery pack, so as to identify the serial-parallel relationship of each battery in a battery unit, including:
and determining the serial-parallel connection relation of each battery in the battery unit according to preset battery pack type information or voltage and current sensed by the sensor.
In the embodiment of the invention, the battery pack type information is information which is preset on the battery pack and marks the serial-parallel connection relation of each battery in the battery pack, if the battery pack type information is not preset, cluster analysis is carried out according to the acquired voltage and current, and the serial-parallel connection relation of the batteries in the battery pack is identified.
The serial-parallel relationship of the battery cells is identified, similar to the identification procedure in which the battery cells include single cells.
In the fourth embodiment, the battery unit is a battery pack formed by connecting a plurality of batteries in series and parallel, and the identification is performed according to the voltage of the battery pack
In the embodiment of the invention, the battery unit is a battery pack formed by connecting a plurality of batteries in series and parallel, and the identification process comprises the following steps: and identifying the serial-parallel connection composition mode of the batteries in the battery pack and identifying the serial-parallel connection composition mode of the battery pack. The serial-parallel connection composition mode of the batteries in the battery pack is identified, and is the same as that of the embodiment. The serial-parallel connection composition mode of the identification battery pack is similar to the identification process of the battery unit containing single cells.
In the embodiment of the invention, the battery management unit is utilized to identify the battery units and the serial-parallel connection relation of the batteries, and all the voltage data and the current data are analyzed by collecting the unit voltage and the unit current of the battery units and the battery voltage and the battery current of each battery, so that the batteries or the battery units are classified, and the serial-parallel connection composition mode of the batteries or the battery units is provided. The method can automatically identify the serial-parallel grouping mode of the battery units in the battery system and the serial-parallel grouping mode of each battery in the battery units, and can identify the serial-parallel relation of various battery units based on the method of the embodiment of the invention, so that the high-efficiency battery management is carried out according to the identified serial-parallel grouping mode, and the output current and the charge-discharge current of each battery unit are regulated, thereby carrying out balanced control on each battery unit, prolonging the service life of the battery, having higher suitability, reducing the development requirement of the battery system and saving the development and maintenance cost of the battery system.
Fig. 6 is a schematic structural diagram of a device for identifying a serial-parallel relationship of battery cells according to an embodiment of the present invention. As shown in fig. 6, the apparatus includes:
The parameter obtaining module 601 is configured to start the battery system, and obtain circuit unit parameters of each battery unit in the battery system;
in an embodiment of the present invention, as an alternative embodiment, the cell circuit parameters include a cell circuit voltage and a cell circuit current.
The clustering module 602 is configured to cluster the acquired unit circuit parameters to obtain unit clustering parameters;
In the embodiment of the present invention, as an optional embodiment, the clustering module 602 is specifically configured to:
Clustering the acquired unit circuit voltages to obtain one or more unit clustering voltages; and
And clustering the acquired unit circuit currents to obtain one or more unit clustering currents.
The relationship determining module 603 is configured to obtain, based on each unit clustering parameter and a preset clustering criterion, a unit clustering parameter that meets the clustering criterion, and determine a serial-parallel relationship of the battery units corresponding to the unit clustering parameter according to a mapping relationship between the clustering criterion and the group relationship.
In an embodiment of the present invention, as an optional embodiment, the relationship determining module 603 includes:
A current first identifying unit (not shown in the figure) for judging whether all the unit clustering currents meet a preset current clustering criterion from the obtained unit clustering currents, if so, determining that each battery unit corresponding to the obtained same unit clustering current is in a series connection relationship, and the different unit clustering currents are in a parallel connection relationship;
and the voltage first identification unit is used for judging whether all the unit clustering voltages meet the preset voltage clustering criterion from the obtained unit clustering voltages if any unit clustering current does not meet the current clustering criterion, and determining that all the battery units corresponding to the same unit clustering voltage are in a parallel connection relationship and that different unit clustering voltages are in a series connection relationship if all the unit clustering voltages meet the preset voltage clustering criterion.
In an embodiment of the present invention, as an optional embodiment, the current first identifying unit is specifically configured to:
Aiming at each unit clustering current, acquiring a clustering battery unit corresponding to the unit clustering current and the number of the clustering battery units;
calculating various total current deviations of the clustered battery units corresponding to the clustering currents of the units;
calculating various total voltage deviations of the clustered battery cells corresponding to the clustering currents of the cells;
if the various total current deviations are smaller than the first current deviation threshold value, the various total voltage deviations are smaller than the first voltage deviation threshold value, and the number of the clustered battery units corresponding to the clustered currents of the units is equal;
And calculating unit current deviation among the battery units in each clustered battery unit according to each clustered battery unit, and determining that all the unit clustering currents meet the current clustering criterion if each unit current deviation is smaller than a preset second current deviation threshold value.
In an embodiment of the present invention, as an optional embodiment, the voltage first identifying unit is specifically configured to:
Aiming at each unit clustering voltage, acquiring a clustering battery unit corresponding to the unit clustering voltage and the number of the clustering battery units;
calculating various total current deviations of the clustered battery cells corresponding to the clustering voltages of the cells;
calculating various total voltage deviations of the clustered battery cells corresponding to the clustering voltages of the cells;
if the various total current deviations are smaller than a third current deviation threshold value, the various total voltage deviations are smaller than a second voltage deviation threshold value, and the number of the clustered battery units corresponding to the voltage clustering parameters of the units is equal;
And calculating the unit voltage deviation among the battery units in each clustered battery unit according to each clustered battery unit, and determining that all the unit clustering voltages meet the voltage clustering criterion if each unit voltage deviation is smaller than a preset third voltage deviation threshold value.
In an embodiment of the present invention, as another alternative embodiment, the relationship determining module 603 includes:
the voltage second identification unit is used for judging whether all the unit clustering voltages meet a preset voltage clustering criterion from the obtained unit clustering voltages, and if so, determining that all battery units corresponding to the same unit clustering voltage are in a parallel connection relationship and that different unit clustering voltages are in a series connection relationship;
And the current second identification unit is used for judging whether all the unit clustering currents meet the preset current clustering criteria from the obtained unit clustering currents if the voltage of any unit clustering does not meet the voltage clustering criteria, and determining that all the battery units corresponding to the extracted same unit clustering current are in a series connection relationship and that different unit clustering currents are in a parallel connection relationship if all the unit clustering currents meet the preset current clustering criteria.
In the embodiment of the present invention, as an optional embodiment, the relationship determining module 603 is further configured to:
Acquiring circuit parameters of each battery in each battery unit aiming at each battery unit;
clustering the acquired circuit parameters to obtain clustering parameters of each battery;
Based on each battery clustering parameter and a preset battery clustering criterion, if all the battery clustering parameters meet the battery clustering criterion, determining the serial-parallel connection relation of the batteries corresponding to all the battery clustering parameters according to the mapping relation between the battery clustering criterion and the grouping relation.
As shown in fig. 7, an embodiment of the present application provides a computer device 700 for executing the method for identifying a serial-parallel relationship of battery cells in fig. 1, where the device includes a memory 701, a processor 702 connected to the memory 701 through a bus, and a computer program stored on the memory 701 and capable of running on the processor 702, where the steps of the method for identifying a serial-parallel relationship of battery cells are implemented when the processor 702 executes the computer program.
Specifically, the memory 701 and the processor 702 can be general-purpose memories and processors, and are not limited herein, and the method for identifying the serial-parallel relationship of the battery cells can be performed when the processor 702 runs a computer program stored in the memory 701.
Corresponding to the method for identifying the serial-parallel relationship of the battery cells in fig. 1, the embodiment of the application further provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor performs the steps of the above method for identifying the serial-parallel relationship of the battery cells.
In particular, the storage medium can be a general-purpose storage medium, such as a mobile magnetic disk, a hard disk, or the like, and the computer program on the storage medium can execute the above method for identifying the serial-parallel relationship of the battery cells when executed.
In the embodiments provided herein, it should be understood that the disclosed systems and methods may be implemented in other ways. The system embodiments described above are merely illustrative, e.g., the division of the elements is merely a logical functional division, and there may be additional divisions in actual implementation, and e.g., multiple elements or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some communication interface, system or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown 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 may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments provided in the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
It should be noted that: like reference numerals and letters in the following figures denote like items, and thus once an item is defined in one figure, no further definition or explanation of it is required in the following figures, and furthermore, the terms "first," "second," "third," etc. are used merely to distinguish one description from another and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above examples are only specific embodiments of the present application, and are not intended to limit the scope of the present application, but it should be understood by those skilled in the art that the present application is not limited thereto, and that the present application is described in detail with reference to the foregoing examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the corresponding technical solutions. Are intended to be encompassed within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A method of identifying a series-parallel relationship of battery cells, comprising:
starting a battery system, and acquiring circuit unit parameters of each battery unit in the battery system;
clustering the acquired unit circuit parameters to obtain unit clustering parameters;
Based on each unit clustering parameter and a preset clustering criterion, acquiring the unit clustering parameters meeting the clustering criterion, and determining the serial-parallel connection relation of the battery units corresponding to the unit clustering parameters according to the mapping relation between the clustering criterion and the grouping relation.
2. The method of claim 1, wherein the unit circuit parameters include a unit circuit voltage and a unit circuit current, clustering the acquired unit circuit parameters to obtain unit cluster parameters, including:
Clustering the acquired unit circuit voltages to obtain one or more unit clustering voltages; and
And clustering the acquired unit circuit currents to obtain one or more unit clustering currents.
3. The method according to claim 2, wherein the clustering criteria include a current clustering criterion and a voltage clustering criterion, the obtaining unit clustering parameters meeting the clustering criteria based on each unit clustering parameter and a preset clustering criterion, and determining the serial-parallel relationship of the battery units corresponding to the unit clustering parameters according to the mapping relationship between the clustering criteria and the group relationship, includes:
Judging whether all the unit clustering currents meet a preset current clustering criterion from the obtained unit clustering currents, if so, determining that all battery units corresponding to the same unit clustering current are in a series connection relationship, and the different unit clustering currents are in a parallel connection relationship;
If any unit clustering current does not meet the current clustering criterion, judging whether all unit clustering voltages meet the preset voltage clustering criterion from the obtained unit clustering voltages, and if so, determining that all battery units corresponding to the same unit clustering voltage are in a parallel connection relationship, and the different unit clustering voltages are in a series connection relationship.
4. The method according to claim 3, wherein the determining whether all unit cluster currents satisfy a preset current cluster criterion from the obtained unit cluster currents includes:
Aiming at each unit clustering current, acquiring a clustering battery unit corresponding to the unit clustering current and the number of the clustering battery units;
calculating various total current deviations of the clustered battery units corresponding to the clustering currents of the units;
calculating various total voltage deviations of the clustered battery cells corresponding to the clustering currents of the cells;
if the various total current deviations are smaller than the first current deviation threshold value, the various total voltage deviations are smaller than the first voltage deviation threshold value, and the number of the clustered battery units corresponding to the clustered currents of the units is equal;
And calculating unit current deviation among the battery units in each clustered battery unit according to each clustered battery unit, and determining that all the unit clustering currents meet the current clustering criterion if each unit current deviation is smaller than a preset second current deviation threshold value.
5. The method according to claim 3, wherein the determining whether all the cell cluster voltages satisfy the cell cluster current of the preset voltage cluster criterion from the obtained cell cluster voltages includes:
Aiming at each unit clustering voltage, acquiring a clustering battery unit corresponding to the unit clustering voltage and the number of the clustering battery units;
calculating various total current deviations of the clustered battery cells corresponding to the clustering voltages of the cells;
calculating various total voltage deviations of the clustered battery cells corresponding to the clustering voltages of the cells;
if the various total current deviations are smaller than a third current deviation threshold value, the various total voltage deviations are smaller than a second voltage deviation threshold value, and the number of the clustered battery units corresponding to the voltage clustering parameters of the units is equal;
And calculating the unit voltage deviation among the battery units in each clustered battery unit according to each clustered battery unit, and determining that all the unit clustering voltages meet the voltage clustering criterion if each unit voltage deviation is smaller than a preset third voltage deviation threshold value.
6. The method according to claim 2, wherein the clustering criteria include a current clustering criterion and a voltage clustering criterion, the obtaining unit clustering parameters meeting the clustering criteria based on each unit clustering parameter and a preset clustering criterion, and determining the serial-parallel relationship of the battery units corresponding to the unit clustering parameters according to the mapping relationship between the clustering criteria and the group relationship, includes:
Judging whether all the unit clustering voltages meet a preset voltage clustering criterion from the obtained unit clustering voltages, if so, determining that all battery units corresponding to the same unit clustering voltage are in a parallel connection relationship, and the different unit clustering voltages are in a series connection relationship;
If any unit clustering voltage does not meet the voltage clustering criterion, judging whether all unit clustering currents meet the preset current clustering criterion from the obtained unit clustering currents, and if so, determining that each battery unit corresponding to the same extracted unit clustering current is in a series connection relationship, and the different unit clustering currents are in a parallel connection relationship.
7. The method according to any one of claims 1 to 6, further comprising:
Acquiring circuit parameters of each battery in each battery unit aiming at each battery unit;
clustering the acquired circuit parameters to obtain clustering parameters of each battery;
and if all the battery clustering parameters meet the preset battery clustering criteria, determining the serial-parallel connection relation of the batteries corresponding to all the battery clustering parameters according to the mapping relation between the battery clustering criteria and the grouping relation.
8. An apparatus for identifying a series-parallel relationship of battery cells, comprising:
The parameter acquisition module is used for starting the battery system and acquiring circuit unit parameters of each battery unit in the battery system;
the clustering module is used for clustering the acquired unit circuit parameters to obtain unit clustering parameters;
And the relation determining module is used for acquiring the unit clustering parameters meeting the clustering criteria based on the unit clustering parameters and preset clustering criteria, and determining the serial-parallel relation of the battery units corresponding to the unit clustering parameters according to the mapping relation between the clustering criteria and the group relation.
9. A computer device, comprising: a processor, a memory and a bus, said memory storing machine readable instructions executable by said processor, said processor and said memory communicating over the bus when the computer device is running, said machine readable instructions when executed by said processor performing the steps of the method of identifying a serial-parallel relationship of battery cells as claimed in any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when executed by a processor, performs the steps of the method of identifying a serial-parallel relationship of battery cells as claimed in any one of claims 1 to 7.
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| CN202211326832.3A CN117930007A (en) | 2022-10-25 | 2022-10-25 | Method and device for identifying serial-parallel connection relation of battery units |
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| CN202211326832.3A CN117930007A (en) | 2022-10-25 | 2022-10-25 | Method and device for identifying serial-parallel connection relation of battery units |
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