CN111570310B - Identification method and device for short board battery cell, electronic equipment and storage medium - Google Patents
Identification method and device for short board battery cell, electronic equipment and storage medium Download PDFInfo
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- CN111570310B CN111570310B CN202010275650.2A CN202010275650A CN111570310B CN 111570310 B CN111570310 B CN 111570310B CN 202010275650 A CN202010275650 A CN 202010275650A CN 111570310 B CN111570310 B CN 111570310B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/36—Sorting apparatus characterised by the means used for distribution
- B07C5/361—Processing or control devices therefor, e.g. escort memory
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4285—Testing apparatus
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The application discloses a method and a device for identifying a short-plate battery cell, electronic equipment and a storage medium, wherein the method comprises the following steps: determining a balancing mode of the battery pack; the battery cell is subjected to abnormal identification based on the abnormal identification strategy determined by the battery pack balancing mode to obtain the abnormal battery cell, so that the embodiment of the application can be applied to various balancing modes, and the problem of identification effectiveness caused by mismatching of the identification strategy and the balancing mode in the prior art is solved; if the health state of the abnormal battery cell is matched with the preset health state, the abnormal battery cell is determined to be the short plate battery cell, and therefore the short plate battery cell determined in the embodiment of the application is subjected to redundancy processing through the single health value, and accuracy of the recognition result is improved.
Description
Technical Field
The present disclosure relates to the field of battery technologies, and in particular, to a method and an apparatus for identifying a short plate cell, an electronic device, and a storage medium.
Background
The State Of Health (SOH) Of a lithium battery is an important parameter reflecting the performance and life Of the battery, and it is a slowly varying quantity. With the rapid development Of electric vehicles and energy storage, batteries are used more and more, in general, batteries Of electric vehicles include thousands Of electric cores, the SOH Of each electric core affects the SOH Of the battery, and in the prior art, when the batteries are in a stable State, the remaining power (SOC) Of each electric core is obtained, and then the SOH Of each electric core is calculated to determine the SOH Of the batteries.
Because capacity internal resistance has the difference between the electric core when the battery package leaves the factory, or in the use of electric automobile, along with the loss of each electric core different degree, there may be one or more short board electric cores in the battery package, seriously influence the capacity and the use experience of battery package. Therefore, the short plate battery core needs to be detected by a certain method, so that the maintenance or the replacement is convenient, and the service life of the battery pack is prolonged.
In the prior art, a charging identification method or a discharging identification method is generally adopted to identify a short plate battery cell, the two short plate battery cell identification methods are simple but are limited by a battery equalization mode, the two methods are only suitable for a specific battery equalization mode and do not meet all the battery equalization modes, and once the specific battery equalization mode is separated, the short plate battery cell cannot be effectively identified; in addition, the two methods for identifying the short plate battery cell are single-side identification, and the identification result is not very accurate.
Disclosure of Invention
The embodiment of the application provides a method and a device for identifying a short board battery cell, electronic equipment and a storage medium, which can accurately identify the short board battery cell and effectively identify the short board battery cell in different equilibrium modes.
On one hand, the embodiment of the application provides a method for identifying a short-plate battery cell, which comprises the following steps:
determining a balancing mode of the battery pack;
performing abnormity identification on the battery cell based on an abnormity identification strategy determined by a balancing mode to obtain an abnormal battery cell;
and if the health state of the abnormal battery cell is matched with the preset health state, determining the abnormal battery cell as a short-plate battery cell.
Optionally, the balancing manner of the battery pack includes a first balancing manner; the abnormal identification strategy determined by the first balance mode comprises a first identification strategy;
the above-mentioned unusual identification strategy based on balanced mode is confirmed carries out unusual discernment to electric core, obtains unusual electric core, includes:
determining a to-be-determined battery cell in a discharge tail end state based on a first balance mode;
and if the voltage of the to-be-determined battery cell in the charging tail end state is not less than the voltages of other battery cells except the to-be-determined battery cell, marking the to-be-determined battery cell as an abnormal battery cell.
Optionally, the balancing manner of the battery pack includes a second balancing manner; the abnormal identification strategy determined by the second balance mode comprises a second identification strategy;
the above-mentioned unusual identification strategy based on balanced mode is confirmed carries out unusual discernment to electric core, obtains unusual electric core, includes:
determining a battery cell to be determined in a charging tail end state based on a second equalization mode;
and if the voltage of the to-be-determined battery cell in the discharge tail end state is not greater than the voltages of other battery cells except the to-be-determined battery cell, marking the to-be-determined battery cell as an abnormal battery cell.
Optionally, the balancing manner of the battery pack includes a third balancing manner; the abnormal identification strategy determined by the third balancing mode comprises a second identification strategy;
the above-mentioned unusual identification strategy based on balanced mode is confirmed carries out unusual discernment to electric core, obtains unusual electric core, includes:
determining a first to-be-determined cell in a discharge end state and a second to-be-determined cell in a charge end state based on a third equalization manner
And if the first to-be-determined battery cell and the second to-be-determined battery cell are the same battery cell, marking the battery cell as an abnormal battery cell.
Optionally, the health state is represented by a health value SOH.
Optionally, the preset health state value is a health value of a cell with a lowest health value in a cell set of the battery pack;
above-mentioned if the health condition of unusual electric core matches with presetting the health condition, confirm unusual electric core as short slab electricity core, include:
and if the health value of the abnormal electric core is consistent with the numerical value of the preset health state, determining the abnormal electric core as a short-plate electric core.
Optionally, the value of the preset health state has a preset range;
above-mentioned if the health condition of unusual electric core matches with presetting the health condition, confirm unusual electric core as short slab electricity core, include:
and if the health value of the abnormal electric core is within the preset range, determining the abnormal electric core as a short-plate electric core.
Another aspect provides an apparatus for identifying a short plate cell, the apparatus including:
the equalization mode determining module is used for determining the equalization mode of the battery pack;
the identification module is used for carrying out abnormity identification on the battery cell based on an abnormity identification strategy determined by a balance mode to obtain an abnormal battery cell;
and the short plate battery cell determining module is used for determining the abnormal battery cell as the short plate battery cell if the health state of the abnormal battery cell is matched with the preset health state.
Another aspect provides an electronic device, which includes a processor and a memory, where the memory stores at least one instruction, at least one program, a code set, or a set of instructions, and the at least one instruction, the at least one program, the code set, or the set of instructions are loaded and executed by the processor to implement the method for identifying a short board cell as described above.
Another aspect provides a computer-readable storage medium, in which at least one instruction, at least one program, a code set, or a set of instructions is stored, and the at least one instruction, the at least one program, the code set, or the set of instructions is loaded and executed by a processor to implement the method for identifying a short board cell as described above.
The identification method and device for the short board battery cell, the electronic device and the storage medium provided by the embodiment of the application have the following technical effects:
the battery cell is subjected to abnormal identification based on the abnormal identification strategy determined by the battery pack balancing mode to obtain the abnormal battery cell, so that the embodiment of the application can be applied to various balancing modes, and the problem of identification effectiveness caused by mismatching of the identification strategy and the balancing mode in the prior art is solved; if the health state of the abnormal battery cell is matched with the preset health state, the abnormal battery cell is determined to be the short plate battery cell, and therefore the short plate battery cell determined in the embodiment of the application is subjected to redundancy processing through the single health value, and accuracy of the recognition result is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic flowchart of an identification method for a short board cell according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of an identification apparatus for a short board battery cell provided in an embodiment of the present application.
Detailed Description
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 only a part of the embodiments of the present application, and not all of the embodiments. Other embodiments, which can be derived by one of ordinary skill in the art from the embodiments given herein without making any creative effort, are also within the scope of the present disclosure.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or server that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
A specific embodiment of a method for identifying a short plate battery cell according to the present application is described below, fig. 1 is a schematic flow chart of the method for identifying a short plate battery cell according to the embodiment of the present application, and the present specification provides the method operation steps according to the embodiment or the flow chart, but more or fewer operation steps may be included based on conventional or non-inventive labor. The order of steps recited in the embodiments is merely one manner of performing the steps in a multitude of orders and does not represent the only order of execution. In practice, the system or server product may be implemented in a sequential or parallel manner (e.g., parallel processor or multi-threaded environment) according to the embodiments or methods shown in the figures. Specifically, as shown in fig. 1, the method may include:
s1: and determining the balance mode of the battery pack.
In this embodiment, the equalization modes of the battery pack include a first equalization mode, a second equalization mode, and a third equalization mode, where the first equalization mode is charge equalization, the second equalization mode is discharge equalization, and the third equalization mode is other equalization modes except charge equalization and discharge equalization.
S2: and carrying out abnormity identification on the battery cell based on the abnormity identification strategy determined by the balance mode to obtain an abnormal battery cell.
In the embodiment of the application, the three equalization modes respectively correspond to different abnormal recognition strategies, the corresponding abnormal recognition strategy is selected based on the equalization mode of the battery pack, the abnormal recognition strategy of the embodiment of the application can be matched with other equalization modes except charging equalization and discharging equalization, and the problem of recognition failure caused by mismatching of the equalization modes can be effectively avoided.
In an alternative embodiment, the balancing manner of the battery pack includes a first balancing manner, i.e. charge balancing, and the abnormality identification policy determined by the first balancing manner includes a first identification policy, so that the step S2 includes:
s201: and determining the battery cell to be determined in the discharge tail end state based on the first balance mode.
Specifically, the step S201 may include: when the battery pack is in a static state, the voltage distribution of all the battery cells is observed at a certain discharge cutoff voltage or SOC, and if the voltage distribution of all the battery cells is found, the voltage average value of other battery cells-the voltage of a certain battery cell>＝ΔV low If the cell is marked as a suspected cell for three times, the cell is a to-be-determined cell at the discharge end, otherwise, the cell is not the to-be-determined cell at the discharge end, wherein Δ V low Is the OCV difference corresponding to the maximum SOC error at the end of discharge; for example, a battery pack includes a battery cell 1, a battery cell 2, a battery cell 3, and a battery cell 4, and when the battery pack is in a static state, voltage distribution of all the battery cells is observed at a certain discharge cutoff voltage or SOC, and the voltage of the battery cell 1 is recorded as V 1 The average voltage values of the cell 2, the cell 3 and the cell 4 are recorded as V ave1 If V is ave1 -V 1 >＝ΔV low If the battery cell 1 is marked as a suspected battery cell, if the battery cell 1 is marked as the suspected battery cell for three times, the battery cell 1 is a to-be-determined battery cell at the discharge end, and the step S202 is performed, otherwise, the battery cell 1 is not the to-be-determined battery cell at the discharge end, and the to-be-determined battery cell at the discharge end is re-identified.
S202: and if the voltage of the to-be-determined battery cell in the charging tail end state is not less than the voltages of other battery cells except the to-be-determined battery cell, marking the to-be-determined battery cell as an abnormal battery cell.
Specifically, the step S202 may include: when the battery pack is in a static state, observing the voltage distribution of all the battery cores at a certain charging cut-off voltage or SOC, and if the voltage of the battery core to be determined is not less than the voltages of other battery cores except the battery core to be determined, marking the battery core to be determined as an abnormal battery core; for example, when the battery cell 1 is determined as a to-be-determined battery cell, when the battery pack is in a static state, voltage distributions of the battery cell 1, the battery cell 2, the battery cell 3, and the battery cell 4 are observed at a certain charge cut-off voltage or SOC, if the voltage of the battery cell 1 is not less than the voltages of the battery cell 2, the battery cell 3, and the battery cell 4, the battery cell 1 is marked as an abnormal battery cell, and step S3 is performed, otherwise, the battery cell 1 is not an abnormal battery cell, and step S201 is performed.
In an alternative embodiment, the balancing manner of the battery pack includes a second balancing manner, namely discharge balancing, and the abnormality identification policy determined by the second balancing manner includes a second identification policy, so that the step S2 includes:
s211: and determining the battery cell to be determined in the charging tail end state based on the second equalization mode.
Specifically, the step S211 may include: when the battery pack is in a static state, the voltage distribution of all the battery cells is observed at a certain charging cut-off voltage or SOC, and if the voltage distribution of all the battery cells is found to be' the voltage of a certain battery cell-the average voltage of other battery cells>＝ΔV high If the cell is marked as a suspected cell for three times, the cell is a to-be-determined cell at the charging tail end, otherwise, the cell is not the to-be-determined cell at the charging tail end, wherein the Δ V is obtained by counting the number of the cells in the cell, and the cell is marked as a suspected cell high Is the most charged terminalAn OCV difference value corresponding to a large SOC error; for example, a battery pack is provided with a battery cell I, a battery cell II, a battery cell III and a battery cell IV, when the battery pack is in a static state, the voltage distribution of all the battery cells is observed at a certain discharge cut-off voltage or SOC, and the voltage of the battery cell I is recorded as V Ⅰ The average voltage values of the battery cell II, the battery cell III and the battery cell IV are recorded as V ave2 If V is Ⅰ -V ave2 >＝ΔV high If the electric core I is marked as the suspected electric core for three times, the electric core I is the electric core to be determined at the charging tail end, and the step S212 is executed, otherwise, the electric core I is not the electric core to be determined at the charging tail end, and the electric core to be determined at the charging tail end is re-identified.
S212: and if the voltage of the to-be-determined battery cell in the discharge tail end state is not greater than the voltages of other battery cells except the to-be-determined battery cell, marking the to-be-determined battery cell as an abnormal battery cell.
Specifically, the step S212 may include: when the battery pack is in a static state, observing the voltage distribution of all the battery cores at a certain discharge cutoff voltage or SOC, and if the voltage of the battery core to be determined is not greater than the voltages of other battery cores except the battery core to be determined, marking the battery core to be determined as an abnormal battery core; for example, when the battery cell i is determined as a battery cell to be determined, and when the battery pack is in a static state, the voltage distributions of the battery cell i, the battery cell ii, the battery cell iii, and the battery cell iv are observed at a certain discharge cutoff voltage or SOC, if the voltage of the battery cell i is not greater than the voltage distributions of the battery cell ii, the battery cell iii, and the battery cell iv, the battery cell i is marked as an abnormal battery cell, and the step S3 is entered, otherwise, the battery cell i is not an abnormal battery cell, and the step S211 is returned.
In an alternative embodiment, the balancing manners of the battery pack include a third balancing manner, that is, balancing manners other than the charging balancing manner and the discharging balancing manner, and the abnormality identification policy determined by the third balancing manner includes a third identification policy, so that the step S2 includes:
s221: and determining a first to-be-determined battery cell in a discharge end state and a second to-be-determined battery cell in a charge end state based on a third equalization mode.
Specifically, the step S221 may include:
when the battery pack is in a static state, the voltage distribution of all the battery cells is observed at a certain discharge cutoff voltage or SOC, and if the voltage distribution of all the battery cells is found, the voltage average value of other battery cells-the voltage of a certain battery cell>＝ΔV low If the cell is marked as a suspected cell for three times, the cell is the first to-be-determined cell at the discharge end, otherwise, the cell is not the first to-be-determined cell at the discharge end, wherein Δ V low An OCV difference value corresponding to a maximum SOC error at the discharge end; for example, a battery cell a, a battery cell b, a battery cell c, and a battery cell d are provided in the battery pack, and when the battery pack is in a static state, the voltage distribution of all the battery cells is observed at a certain discharge cutoff voltage or SOC, and the voltage of the battery cell a is recorded as V a The average voltage values of the cell b, the cell c and the cell d are recorded as V ave3 If V is ave3 -V a >＝ΔV low If the battery cell a is marked as the suspected battery cell for three times, the battery cell a is the first to-be-determined battery cell at the discharge end, otherwise, the battery cell a is not the first to-be-determined battery cell at the discharge end, and the first to-be-determined battery cell at the discharge end is re-identified.
When the battery pack is in a static state, the voltage distribution of all the battery cells is observed at a certain charging cut-off voltage or SOC, and if the voltage distribution of all the battery cells is found to be' the voltage of a certain battery cell-the average voltage of other battery cells>＝ΔV high If the cell is marked as a suspected cell for three times, the cell is a second cell to be determined at the charging terminal, otherwise, the cell is not the second cell to be determined at the charging terminal, wherein Δ V high An OCV difference value corresponding to a maximum SOC error at the end of charging; for example, a battery pack includes a battery cell a, a battery cell B, a battery cell C, and a battery cell D, and when the battery pack is in a static state, voltage distribution of all the battery cells is observed at a certain discharge cutoff voltage or SOC, and the voltage of the battery cell a is recorded as V A The average voltage values of the cell B, the cell C and the cell D are recorded as V ave4 If V is A -V ave4 >＝ΔV high If the battery cell a is marked as the suspected battery cell for three times, the battery cell a is the second battery cell to be determined at the charging terminal, otherwise, the battery cell a is not the second battery cell to be determined at the charging terminal, and the second battery cell to be determined at the charging terminal is identified again.
S222: and if the first to-be-determined battery cell and the second to-be-determined battery cell are the same battery cell, marking the battery cell as an abnormal battery cell.
Specifically, the step S222 may include: when the battery cell a is determined as a first battery cell to be determined and the battery cell a is determined as a second battery cell to be determined, if the battery cell a and the battery cell a are the same battery cell, marking the battery cell as an abnormal battery cell, otherwise, returning to step S221.
S3: and if the health state of the abnormal battery cell is matched with the preset health state, determining the abnormal battery cell as a short-plate battery cell.
In particular, the above-mentioned state of health is represented by the health value SOH.
In an optional embodiment, the preset health state value is a health value of a cell with a lowest health value in a cell set of the battery pack, and thus the step S3 includes:
if the health value of the abnormal electric core is consistent with the numerical value of the preset health state, determining the abnormal electric core as a short-plate electric core; specifically, when a plurality of battery cells exist in the battery pack, the SOH values of all the battery cells are calculated, and if the SOH value of an abnormal battery cell is smaller than the SOH values of other battery cells, the abnormal battery cell is determined as a short-plate battery cell, otherwise, the step S2 is returned.
In an alternative embodiment, the preset health status value has a preset range, and thus, the step S3 includes:
if the health value of the abnormal electric core is within the preset range, determining the abnormal electric core as a short plate electric core; specifically, the preset health state value may be set to be an SOH value of 20% to 30%, if the SOH value of the abnormal electrical core is 20% to 30%, the abnormal electrical core is determined to be a short-circuit-board electrical core, otherwise, the step S2 is returned to.
The embodiment of the present application further provides an identification apparatus for a short plate electric core, and fig. 2 is a schematic structural diagram of the identification apparatus for a short plate electric core provided in the embodiment of the present application, and as shown in fig. 2, the apparatus includes:
an equalization mode determination module 101, configured to determine an equalization mode of the battery pack;
the identification module 102 is configured to perform anomaly identification on the battery cell based on the anomaly identification strategy determined by the balancing manner to obtain an abnormal battery cell;
and the short plate battery cell determining module 103 is configured to determine the abnormal battery cell as the short plate battery cell if the health state of the abnormal battery cell matches a preset health state.
In an alternative embodiment, the apparatus further comprises:
the identification module is used for determining the electric core to be determined in the discharge tail end state based on the first balance mode and determining the abnormal electric core according to the voltage distribution of the electric core in the charge tail end state.
In an alternative embodiment, the apparatus further comprises:
the identification module is used for determining the battery cell to be determined in the charging tail end state based on the second equalization mode, and determining the abnormal battery cell according to the voltage distribution of the battery cell in the discharging tail end state.
In an alternative embodiment, the apparatus further comprises:
the identification module is used for determining a first to-be-determined battery cell in a discharge end state and a second to-be-determined battery cell in a charge end state based on a third equalization mode, and determining an abnormal battery cell according to the first to-be-determined battery cell and the second to-be-determined battery cell.
In an alternative embodiment, the apparatus further comprises:
the short plate battery core determining module is used for determining the short plate battery core according to the health value of the battery core with the lowest health value in the battery core set of the battery pack.
In an alternative embodiment, the apparatus further comprises:
the short plate electric core determining module is used for determining the short plate electric core according to a preset range of a numerical value of a preset health state.
The device and method embodiments in the embodiments of the present application are based on the same application concept.
The method provided by the embodiment of the application can be executed in a computer terminal, a server or a similar operation device.
Embodiments of the present application further provide a storage medium, where the storage medium may be disposed in a server to store at least one instruction, at least one program, a code set, or a set of instructions related to implementing the method for identifying a short board cell in the method embodiments, and the at least one instruction, the at least one program, the code set, or the set of instructions are loaded and executed by the processor to implement the method for identifying a short board cell.
Alternatively, in this embodiment, the storage medium may be located in at least one network server of a plurality of network servers of a computer network. Optionally, in this embodiment, the storage medium may include, but is not limited to: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
As can be seen from the foregoing embodiments of the identification method, the device, or the storage medium for a short-plate electrical core provided by the present application, in the present application, an abnormal identification policy determined based on a battery pack balancing manner is used to perform abnormal identification on an electrical core to obtain an abnormal electrical core, so that the embodiments of the present application can be applied to various balancing manners, and the problem of identification effectiveness caused by mismatching between an identification policy and a balancing manner in the prior art is solved; if the health state of the abnormal battery cell is matched with the preset health state, the abnormal battery cell is determined to be the short plate battery cell, and therefore the short plate battery cell determined in the embodiment of the application is subjected to redundancy processing through the single health value, and accuracy of the recognition result is improved.
It should be noted that: the sequence of the embodiments of the present application is only for description, and does not represent the advantages and disadvantages of the embodiments. And specific embodiments thereof have been described above. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the apparatus embodiment, since it is substantially similar to the method embodiment, the description is relatively simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A method for identifying a short plate cell, the method comprising:
determining a balancing mode of the battery pack;
performing abnormity identification on the battery cell based on an abnormity identification strategy determined by the balance mode to obtain an abnormal battery cell;
if the health state of the abnormal battery cell is matched with a preset health state, determining the abnormal battery cell as a short-plate battery cell;
carrying out abnormity identification on the battery cell based on the abnormity identification strategy determined by the balance mode to obtain an abnormal battery cell, comprising the following steps:
determining a first identification state and a second identification state based on the equalization mode; wherein the first identification state is one of a discharge end state or a charge end state, and the second identification state is the other one of the discharge end state or the charge end state except for the first identification state;
determining a difference value between the voltage of a candidate battery cell in the battery cell and the average value of the voltages of other battery cells according to the first identification state, and if the difference value is greater than or equal to a preset voltage difference value, marking the candidate battery cell as a first suspected battery cell;
if an alternative first suspected cell exists in the first suspected cell and is marked as a first suspected cell for three times continuously, determining that the alternative first suspected cell is a first to-be-determined cell;
and according to the second identification state, marking an abnormal battery cell from the first to-be-determined battery cell.
2. The method of claim 1, wherein the balancing of the battery pack comprises a first balancing;
determining a first identification state and a second identification state based on the equalization manner, including:
determining a first identification state as the discharge end state and a second identification state as the charge end state based on the first equalization mode;
according to the second identification state, marking an abnormal cell from the first to-be-determined cell includes:
if the voltage of the first to-be-determined cell in the state of the charging end is not less than the voltages of other cells except the first to-be-determined cell, marking the first to-be-determined cell as an abnormal cell.
3. The method of claim 1, wherein the balancing of the battery pack comprises a second balancing;
determining a first identification state and a second identification state based on the equalization manner, including:
determining that the first identification state is the charging end state and the second identification state is the discharging end state based on the second equalization mode;
according to the second identification state, marking an abnormal cell from the first to-be-determined cell includes:
if the voltage of the first to-be-determined cell in the discharge end state is not greater than the voltages of other cells except the first to-be-determined cell, marking the first to-be-determined cell as an abnormal cell.
4. The method of claim 1, wherein the balancing of the battery pack comprises a third balancing;
determining a first identification state and a second identification state based on the equalization manner, including:
determining that the first identification state is the discharge end state and the second identification state is the charge end state based on the third equalization mode;
according to the second identification state, marking an abnormal battery cell from the battery cells to be determined, including:
determining a difference value between the voltage of the alternative battery cell in the battery cell and the average value of the voltages of other battery cells according to the second identification state, and if the difference value is greater than or equal to a preset voltage difference value, marking the alternative battery cell as a second suspected battery cell;
if a second suspected candidate cell exists in the second suspected cell and is marked as a second suspected cell for three times continuously, determining the second suspected candidate cell as a second cell to be determined;
if the first to-be-determined battery cell and the second to-be-determined battery cell are the same battery cell, marking the first to-be-determined battery cell as an abnormal battery cell.
5. The method of claim 1, wherein the state of health is represented by a health value, SOH.
6. The method of claim 5, wherein the preset state of health value is a health value of a cell with a lowest health value in the cell set of the battery pack;
if the health state of the abnormal battery cell is matched with the preset health state, determining the abnormal battery cell as a short-plate battery cell, including:
and if the health value of the abnormal electric core is consistent with the numerical value of the preset health state, determining the abnormal electric core as a short-plate electric core.
7. The method of claim 5, wherein the preset health state value has a preset range;
if the health state of the abnormal electric core is matched with the preset health state, determining the abnormal electric core as a short-plate electric core, including:
and if the health value of the abnormal battery cell is within the preset range, determining the abnormal battery cell as a short-plate battery cell.
8. An apparatus for identifying a short board cell, the apparatus comprising:
the equalization mode determining module is used for determining the equalization mode of the battery pack;
the identification module is used for carrying out abnormal identification on the battery cell based on the abnormal identification strategy determined by the balance mode to obtain an abnormal battery cell;
the short plate battery cell determining module is used for determining the abnormal battery cell as the short plate battery cell if the health state of the abnormal battery cell is matched with a preset health state;
carrying out abnormity identification on the battery cell based on the abnormity identification strategy determined by the balance mode to obtain an abnormal battery cell, comprising the following steps:
determining a first identification state and a second identification state based on the equalization mode; wherein the first identification state is one of a discharge end state or a charge end state, and the second identification state is the other one of the discharge end state or the charge end state except for the first identification state;
determining a difference value between the voltage of a candidate battery cell in the battery cell and the average value of the voltages of other battery cells according to the first identification state, and if the difference value is greater than or equal to a preset voltage difference value, marking the candidate battery cell as a first suspected battery cell;
if a candidate first suspected battery cell exists in the first suspected battery cell and is marked as a first suspected battery cell for three times continuously, determining that the candidate first suspected battery cell is a first to-be-determined battery cell;
and according to the second identification state, marking an abnormal battery cell from the first to-be-determined battery cell.
9. An electronic device, comprising a processor and a memory, wherein the memory stores at least one instruction, at least one program, a set of codes, or a set of instructions, which is loaded and executed by the processor to implement the method for identifying a short board cell according to any one of claims 1 to 7.
10. A computer-readable storage medium, wherein at least one instruction, at least one program, a set of codes, or a set of instructions is stored in the storage medium, and the at least one instruction, the at least one program, the set of codes, or the set of instructions is loaded and executed by a processor to implement the method for identifying a short board cell according to any one of claims 1 to 7.
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