CN117054902B - Lithium battery voltage sequencing abnormality detection method and device, electronic equipment and medium - Google Patents
Lithium battery voltage sequencing abnormality detection method and device, electronic equipment and medium Download PDFInfo
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- CN117054902B CN117054902B CN202311148865.8A CN202311148865A CN117054902B CN 117054902 B CN117054902 B CN 117054902B CN 202311148865 A CN202311148865 A CN 202311148865A CN 117054902 B CN117054902 B CN 117054902B
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- 238000012163 sequencing technique Methods 0.000 title claims abstract description 17
- 238000001514 detection method Methods 0.000 title claims abstract description 16
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 13
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 13
- 230000005856 abnormality Effects 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 18
- 238000007599 discharging Methods 0.000 claims abstract description 13
- 239000000178 monomer Substances 0.000 claims description 32
- 238000004364 calculation method Methods 0.000 claims description 12
- 238000004590 computer program Methods 0.000 claims description 8
- 230000002159 abnormal effect Effects 0.000 abstract description 9
- 230000003287 optical effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a lithium battery voltage sequencing anomaly detection method, a device, electronic equipment and a medium, wherein the method comprises the steps of collecting voltage values of each single battery in two groups of battery packs to be detected at a preset frequency in a charging stage and a discharging stage, wherein the two groups of battery packs are produced in the same batch by the same manufacturer; counting the highest frequency of the voltage value of each single battery in each group of battery packs to be tested; calculating a z value based on the formula; if the z value is smaller than a preset threshold value, the voltages of the single batteries in the two groups of battery packs to be tested have sorting difference; if the z value is greater than or equal to a preset threshold value, the voltages of the single batteries in the two groups of battery packs to be tested are not different in sequence. The method provided by the invention detects whether the highest voltage sequencing of the single batteries in the two groups of battery packs has a significant difference, so that whether the voltage sequencing of the single batteries in the battery packs is abnormal can be primarily judged, and readiness work is carried out for the subsequent detection of the voltage abnormality of the single batteries.
Description
Technical Field
The invention relates to the technical field of battery pack abnormality detection, in particular to a lithium battery voltage sequencing abnormality detection method, a device, electronic equipment and a medium.
Background
In a battery pack of an electric vehicle, if each unit of the battery module is identical in physicochemical properties. Meanwhile, under the condition that the working environments are not greatly different, the sequencing of the single voltages from high to low is a real-time dynamic change process, and the condition that the fixed charge and discharge phases are always ranked at the front is avoided. It is necessary to determine whether there is an abnormality in the voltage ordering of the unit cells in the battery pack.
Disclosure of Invention
In view of the foregoing drawbacks or shortcomings in the prior art, it is desirable to provide a method, an apparatus, an electronic device, and a medium for detecting abnormality in voltage sequencing of a lithium battery, to detect whether abnormality exists in voltage value sequencing of unit batteries in a battery pack.
In a first aspect, the present invention provides a method for detecting abnormal voltage sequencing of a lithium battery, including:
the acquisition step: in the charging stage and the discharging stage, collecting the voltage value of each single battery in two groups of battery packs to be tested at a preset frequency, wherein the two groups of battery packs are produced in the same batch by the same manufacturer;
and (3) counting: dividing two groups of battery packs to be tested, and independently counting the times of highest voltage value of each single battery in each group of battery packs to be tested;
the calculation steps are as follows: the calculation is based on the following formula:
wherein U is R 1 And R is 2 Smaller value of (2), and R 1 And R is 2 Respectively representing the frequency sum of the highest single voltage value in the two groups of battery packs;
n A and n B The number of the monomers with the highest monomer voltage values in the two groups of battery packs is respectively represented;
judging: if the z value is smaller than a preset threshold value, the voltages of the single batteries in the two groups of battery packs to be tested have sorting difference; if the z value is greater than or equal to a preset threshold value, the voltages of the single batteries in the two groups of battery packs to be tested are not different in sequence.
Further, before collecting the voltage value of each single battery in the two groups of battery packs at a preset frequency, the method further comprises:
two groups of battery packs are selected from n groups of battery packs to be detected as battery packs to be detected, wherein the n groups of battery packs are produced in the same batch by the same manufacturer, and n is a natural number greater than or equal to 2.
Further, when the voltages of the single batteries in the two groups of battery packs to be tested have sorting difference, reserving a reference group battery pack in the battery packs, and selecting one group battery pack from the rest group battery packs;
based on the reference battery pack and the selected battery pack, the "collecting step", "counting step", "calculating step", and "judging step" are performed.
Further, when the voltages of the single batteries in the two groups of battery packs to be tested are not different in sequence, any group of battery packs is reserved, and one group of battery packs is selected from the rest groups of battery packs;
based on the remaining battery packs and the selected battery pack, the "collecting step", "counting step", "calculating step", and "judging step" are performed.
In a second aspect, the present invention provides a lithium battery voltage sequencing anomaly detection device, including:
the acquisition module is used for acquiring the voltage value of each single battery in two groups of battery packs to be detected at a preset frequency in a charging stage and a discharging stage, wherein the two groups of battery packs are produced in the same batch by the same manufacturer;
the statistics module is used for separately counting the times of highest voltage value of each single battery in each group of battery packs to be tested;
a calculation module for performing calculation based on the following formula:
wherein U is R 1 And R is 2 Smaller value of (2), and R 1 And R is 2 Respectively representing the frequency sum of the highest single voltage value in the two groups of battery packs;
n A and n B The number of the monomers with the highest monomer voltage values in the two groups of battery packs is respectively represented;
the judging module is used for determining that the voltages of the single batteries in the two groups of battery packs to be tested have sorting differences when the z value is smaller than a preset threshold value; when the z value is larger than or equal to a preset threshold value, determining that the voltages of the single batteries in the two groups of battery packs to be tested have no sorting difference.
Further, the device further comprises a first selection module, wherein two groups of battery packs are selected from n groups of battery packs to be detected as battery packs to be detected, the n groups of battery packs are produced in the same batch by the same manufacturer, and n is a natural number greater than or equal to 2.
Further, the battery pack selecting device further comprises a second selecting module, wherein the second selecting module is used for reserving a reference battery pack when the voltages of the single batteries in the two battery packs to be detected are different in sequence, and selecting one battery pack from the rest battery packs.
Further, the battery pack selecting device further comprises a third selecting module, wherein the third selecting module is used for reserving any one group of battery packs when the voltages of the single batteries in the two groups of battery packs to be detected are not different in sequence, and selecting one group of battery packs from the rest groups of battery packs.
In a third aspect, the present invention provides an electronic device comprising a memory and a processor, the memory having stored thereon a computer program, the processor implementing the method according to any of the first aspects when executing the computer program.
In a fourth aspect, the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the method according to any of the first aspects.
Compared with the prior art, the invention has the beneficial effects that:
the invention detects whether the highest voltage sequence of the single batteries in the two groups of battery packs has a significant difference or not through the acquisition step, the statistics step, the calculation step and the judgment step, so that whether the voltage sequence of the single batteries in the battery packs is abnormal or not can be primarily judged, and the readiness work is carried out for the subsequent detection of the voltage abnormality of the single batteries.
It should be understood that the description in this summary is not intended to limit the critical or essential features of the embodiments of the invention, nor is it intended to limit the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the accompanying drawings in which:
fig. 1 is a schematic flow chart of a method for detecting abnormal voltage sequencing of a lithium battery;
fig. 2 is a schematic structural diagram of a lithium battery voltage sequencing anomaly detection device according to the present application;
FIG. 3 is a schematic structural diagram of an electronic device according to the present application;
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the invention are shown in the drawings.
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
Referring to fig. 1, an embodiment of the present invention provides a method for detecting abnormal voltage ordering of a lithium battery, including:
step S101: and in the charging stage and the discharging stage, collecting the voltage value of each single battery in two groups of battery packs to be tested at a preset frequency, wherein the two groups of battery packs are produced in the same batch by the same manufacturer.
In this embodiment, the battery pack is a battery combination formed by connecting and combining multiple groups of single batteries in series or in parallel, two groups of battery packs are installed on a new energy electric car, and the battery packs are controlled to charge and discharge on the new energy electric car, or not installed on the new energy electric car, and the battery packs can be directly charged and discharged; in the charging stage and the discharging stage, collecting the voltage value of each single battery in the battery pack to be tested at intervals of 1 second through a battery management system; the total acquisition time was set to 30 minutes.
Step S102: and separating the two groups of battery packs to be tested, and independently counting the times of highest voltage value of each single battery in each group of battery packs to be tested.
In this embodiment, the single batteries of the two groups of battery packs to be tested are numbered first, and the voltage values of the single batteries in the two groups of battery packs to be tested are arranged in descending order in the charging stage and the discharging stage, and thenRecording the number of the single cell with the highest voltage value in the cell packs in the sequence, respectively installing two groups of cell packs in the vehicle A and the vehicle B, counting the times of the single cell with the highest voltage in the two groups of cell packs, and recording n in the following table A Indicating the number of monomers with highest monomer voltage value in battery pack in vehicle A, n B And the number of the single units with the highest single unit voltage value in the battery pack in the B vehicle is represented.
TABLE 1
| Highest voltage monomer number | A vehicle | B vehicle |
| A/B 1 | a 1 | b 1 |
| A/B 2 | a 2 | b 2 |
| A/B 3 | a 3 | b 3 |
| ...... | ...... | ...... |
| A/B n A /n B | a nA | b nB |
As shown in the above table, the collecting steps are separately performed on the battery pack of the vehicle a and the battery pack of the vehicle B, if the single battery A1 in the battery pack of the vehicle a is located at the first position in the current voltage value sequence, the single number of the battery A1 is recorded, and the battery a is used 1 And similarly, if the single battery B2 in the battery pack of the B vehicle is positioned at the first position in the voltage value sequence, recording the single number of the B2, and using B 2 Indicating the number of times B2 occurs until the acquisition time ends.
Step S103: the calculation is based on the following formula:
wherein U is R 1 And R is 2 Smaller value of (2), and R 1 And R is 2 Respectively representing the frequency sum of the highest single voltage value in the two groups of battery packs;
n A and n B The number of the single units with the highest single unit voltage value in the two groups of battery packs is respectively indicated.
In this embodiment, as shown in the above embodiment, the frequencies of the highest voltage values of the single batteries in the battery packs a and B are mixed, and the frequencies of the single numbers with the highest voltages in the mixed data of the two sets of battery packs are ranked according to the frequencies from high to low, and the following table is filled in:
TABLE 2
| Ranking | Frequency (from high to low) | Belonging to the category | |
| 1 | a 2 | A | |
| 2 | b 3 | B | |
| 3 | b nB | B | |
| .... | |||
| a nA | |||
| R 1 And R is 2 |
As shown in table 2, after the highest voltage frequency data of the single batteries in the two groups of battery packs are mixed, the frequency number with the first frequency ranking is recorded in the first place, the frequency number with the second frequency ranking, the frequency number with the third frequency ranking and the like are recorded from top to bottom in sequence, if the same frequency occurs, the two frequency ranks are in parallel, a column is added in table 2, and the corresponding frequency of remarks is displayed in the car a or the car B.
R is then calculated according to the table 1 And R is 2 Wherein R is 1 Equal to the sum of all the frequencies belonging to the A-car battery pack of Table 2, R 2 Equal to the sum of all the frequencies belonging to the B-car battery packs in Table 2; according to R 1 And R is 2 Find U value, U equals R 1 And R is 2 The smaller of the two then will U, n A And n B Substituting a formula to calculate a z value, wherein the formula is as follows:
wherein n is A Indicating the number of monomers with highest monomer voltage value in battery pack in vehicle A, n B And the number of the single units with the highest single unit voltage value in the battery pack in the B vehicle is represented.
Step S104: if the z value is smaller than a preset threshold value, the voltages of the single batteries in the two groups of battery packs to be tested have sorting difference; if the z value is greater than or equal to a preset threshold value, the voltages of the single batteries in the two groups of battery packs to be tested are not different in sequence.
In this embodiment, the preset threshold is-1.96, and if the z value is less than-1.96, the voltage ordering of the single batteries in the two groups of battery packs to be tested has a significant difference, which indicates that the ordering of the voltages of the single batteries in the battery packs is abnormal; if the z value is greater than or equal to-1.96, the voltage ordering of the single batteries in the two groups of battery packs to be tested is not significantly different, which means that the voltage ordering of the single batteries in the battery packs is not different.
In a preferred embodiment, before step S101, the method further comprises:
two groups of battery packs are selected from n groups of battery packs to be detected as battery packs to be detected, wherein the n groups of battery packs are produced in the same batch by the same manufacturer, and n is a natural number greater than or equal to 2.
In this embodiment, two groups of n groups of battery packs to be detected are selected for detection, the remaining battery packs are all in a waiting state, for example, four groups of battery packs, such as A, B, C and D, are selected for detection for the first time, and C and D are in a waiting state.
In a preferred embodiment, when there is a sorting difference between the voltages of the unit cells in the two sets of battery packs to be tested, a reference set of battery packs is reserved, and one set of battery packs is selected from the remaining sets of battery packs;
based on the reference battery pack and the selected battery pack, steps S101, S102, 103, and S104 are performed.
In this embodiment, if the a battery pack is the reference group, and the z value is less than-1.96 after the a and B battery packs are detected, the voltages of the unit batteries in the a and B battery packs have a sorting difference, the a group is reserved, and the C group and the a group are selected for the second detection.
Specifically, in the charging stage and the discharging stage, the voltage value of each single battery in the battery pack A and the battery pack C is collected once every 1 second through a battery management system; the total acquisition time was set to 30 minutes.
Two groups of battery packs are respectively arranged in an A car and a C car, the single batteries of the C battery packs are numbered, the voltage values of the single batteries in the A battery pack and the C battery pack are arranged in a descending order respectively in a charging stage and a discharging stage, and the single number with the highest voltage value in the battery packs in the sorting is recorded; counting the number of times of the highest voltage of the single batteries in the two groups of battery packs, and recording n in the following table A Monomer for indicating highest monomer voltage value in battery pack in vehicle ANumber n C And the number of the monomers with the highest monomer voltage value in the battery pack in the C vehicle is represented.
TABLE 3 Table 3
| Highest voltage monomer number | A vehicle | C vehicle |
| A/C 1 | a 1 | c 1 |
| A/C 2 | a 2 | c 2 |
| A/C 3 | a 3 | c 3 |
| ...... | ...... | ...... |
| A/C n A /n C | a nA | c nC |
As shown in table 3 above, the a-car battery pack and the C-car battery pack are collected separately, if in the a-car battery packThe single battery A1 is positioned at the first position in the current voltage value sequence, the single number of the A1 is recorded, and a is used 1 And similarly, if the single battery C2 in the battery pack of the C vehicle is positioned at the first position in the voltage value sequence, recording the single number of the C2, and using C 2 Indicating the number of times C2 occurs until the acquisition time ends.
Mixing the frequency of the highest voltage value of the single batteries in the battery pack A and the battery pack C, and filling the frequency ranking of the single numbers with the highest voltage in the mixed data of the two groups of battery packs into the following table according to the frequency from high to low:
TABLE 4 Table 4
| Ranking | Frequency (from high to low) | Belonging to the category | |
| 1 | a 2 | A | |
| 2 | c 3 | C | |
| 3 | c nC | C | |
| .... | |||
| a nA | |||
| R 1 And R is 3 |
As shown in table 4, after the highest voltage frequency data of the single batteries in the two groups of battery packs are mixed, the frequency number with the first frequency ranking is recorded in the first place, the frequency number with the second frequency ranking, the frequency number with the third frequency ranking and the like are recorded from top to bottom in sequence, if the same frequency occurs, the two frequency ranks are in parallel, a column is newly added in table 4, and the corresponding frequency of remarks is in the car a or the car C.
R is then calculated according to the table 1 And R is 3 Wherein R is 1 Equal to the sum of all the frequencies belonging to the A-car battery pack of Table 2, R 3 Equal to the sum of all the frequencies belonging to the C vehicle battery packs in Table 2; according to R 1 And R is 3 Find U value, U equals R 1 And R is 3 The smaller of the two then will U, n A And n C Substituting a formula to calculate a z value, wherein the formula is as follows:
wherein n is A Indicating the number of monomers with highest monomer voltage value in battery pack in vehicle A, n C And the number of the monomers with the highest monomer voltage value in the battery pack in the C vehicle is represented.
If the z value is smaller than-1.96, the voltage ordering of the single batteries in the battery pack A and the battery pack C has a significant difference, which indicates that the ordering of the single batteries in the battery pack is abnormal; if the z value is greater than or equal to-1.96, the voltage ordering of the single batteries in the battery pack A and the battery pack C has no significant difference, which indicates that the voltage ordering of the single batteries in the battery pack has no difference.
In a preferred embodiment, when there is no sorting difference in the voltages of the unit cells in the two sets of battery packs to be tested, any one set of battery pack is reserved, and one set of battery pack is selected from the remaining sets of battery packs;
based on the remaining battery packs and the selected battery pack, step S101, step S102, step 103, and step S104 are performed.
In this embodiment, if there is no significant difference between the battery packs of the a group and the C group, it indicates that there is no ordering difference between the voltages of the unit batteries in the battery packs, and any one of the battery packs of the a group and the C group may be selected for detection with the D group.
Specifically, in the charging stage and the discharging stage, the voltage value of each single battery in the C battery pack and the D battery pack is collected once every 1 second through the battery management system; the total acquisition time was set to 30 minutes.
The two groups of battery packs are respectively arranged in the C car and the D car, the single batteries of the D battery packs are numbered, the voltage values of the single batteries in the C battery pack and the D battery pack are respectively arranged in descending order in the charging stage and the discharging stage,recording the monomer number with the highest voltage value in the battery pack in the current sequencing; counting the number of times of the highest voltage of the single batteries in the two groups of battery packs, and recording n in the following table C Indicating the number of monomers with highest monomer voltage value in battery pack in C vehicle, n D And the number of the monomers with the highest monomer voltage value in the battery pack in the D vehicle is represented.
TABLE 5
| Highest voltage monomer number | C vehicle | D vehicle |
| C/D 1 | c 1 | d 1 |
| C/D 2 | c 2 | d 2 |
| C/D 3 | c 3 | d 3 |
| ...... | ...... | ...... |
| C/D n C /n D | c nC | dnD |
As shown in the above table 5, the collection steps are separately performed on the C-car battery pack and the D-car battery pack, and if the unit cell C1 in the C-car battery pack is located at the first position in the current voltage value sequence, the unit number of the C1 is recorded, and C is used 1 And similarly, if the single battery D2 in the battery pack of the D vehicle is positioned at the first position in the voltage value sequence, recording the single number of the D2, and using D 2 Indicating the number of times D2 occurs until the end of the acquisition time.
Mixing the frequencies of the highest voltage values of the battery packs of the C vehicle and the single batteries in the battery packs of the C vehicle, and filling the frequencies of the single numbers with the highest voltages in the mixed data of the two groups of battery packs into the following table according to the frequencies from high to low:
TABLE 6
| Ranking | Frequency (from high to low) | Belonging to the category | |
| 1 | c 2 | c | |
| 2 | d 3 | d | |
| 3 | d nD | d | |
| .... | |||
| c nC | |||
| R 3 And R is 4 |
As shown in table 6, after the highest voltage frequency data of the single batteries in the two groups of battery packs are mixed, the frequency number with the first frequency ranking is recorded in the first place, the frequency number with the second frequency ranking, the frequency number with the third frequency ranking and the like are recorded from top to bottom in sequence, if the same frequency occurs, the two frequency ranks are in parallel, a column is added in table 6, and the corresponding frequency of remarks is displayed in the C car or the D car.
R is then calculated according to the table 3 And R is 4 Wherein R is 3 Equal to the sum of all the frequencies belonging to the C-car battery pack of Table 6, R 4 Equal to the sum of all the frequencies belonging to the D-car battery pack in Table 6; according to R 3 And R is 4 Find U value, U equals R 3 And R is 4 The smaller of the two then will U, n C And n D Substituting a formula to calculate a z value, wherein the formula is as follows:
wherein n is C Indicating the number of monomers with highest monomer voltage value in battery pack in C vehicle, n D And the number of the monomers with the highest monomer voltage value in the battery pack in the D vehicle is represented.
If the z value is smaller than-1.96, the voltage ordering of the single batteries in the battery pack C and the battery pack D has a significant difference, which indicates that the ordering of the single batteries in the battery pack is abnormal; if the z value is greater than or equal to-1.96, the voltage ordering of the single batteries in the battery pack C and the battery pack D has no significant difference, which indicates that the voltage ordering of the single batteries in the battery pack has no difference. And judging whether the voltage ordering of the single batteries in the plurality of groups of battery packs has significant difference or not until all the battery packs are detected, and if so, judging that the voltage ordering of the single batteries in the battery packs is abnormal.
An embodiment of the present invention provides a lithium battery voltage sequencing anomaly detection device, as shown in fig. 2, including:
the acquisition module 201 is configured to acquire a voltage value of each unit cell in two groups of battery packs to be tested at a preset frequency in a charging stage and a discharging stage, where the two groups of battery packs are produced in the same batch by the same manufacturer.
The statistics module 202 is configured to count the number of times that the voltage value of each unit cell in each group of to-be-tested battery packs is highest.
A calculation module 203, configured to perform calculation based on the following formula:
wherein U is R 1 And R is 2 Smaller value of (2), and R 1 And R is 2 Respectively representing the frequency sum of the highest single voltage value in the two groups of battery packs; n is n A And n B The number of the single units with the highest single unit voltage value in the two groups of battery packs is respectively indicated.
The judging module 204 is configured to determine that the voltages of the unit batteries in the two groups of to-be-tested battery packs have a sorting difference when the z value is smaller than a preset threshold value; when the z value is larger than or equal to a preset threshold value, determining that the voltages of the single batteries in the two groups of battery packs to be tested have no sorting difference.
In some embodiments, the device further includes a first selection module, configured to select two battery packs from n battery packs to be tested as the battery packs to be tested, where n battery packs are produced in the same batch by the same manufacturer, and n is a natural number greater than or equal to 2.
In some embodiments, the apparatus further includes a second selecting module configured to, when there is a difference in the voltages of the unit cells in the two sets of battery packs to be tested, reserve a reference set of battery packs therein, and select one set of battery packs from the remaining sets of battery packs.
In some embodiments, the apparatus further includes a third selecting module, configured to, when there is no difference in the ordering of the voltages of the unit cells in the two sets of battery packs to be tested, reserve any one of the sets of battery packs, and select one set of battery pack from the remaining sets of battery packs.
In an embodiment of the present application, as shown in fig. 3, an electronic device 300 shown in fig. 3 includes: a processor 301 and a memory 303. Wherein the processor 301 is coupled to the memory 303, such as via a bus 302. Optionally, the electronic device 300 may also include a transceiver 304. It should be noted that, in practical applications, the transceiver 304 is not limited to one, and the structure of the electronic device 300 is not limited to the embodiment of the present application.
The processor 301 may be a CPU (Central Processing Unit ), general purpose processor, DSP (Digital Signal Processor, data signal processor), ASIC (Application Specific Integrated Circuit ), FPGA (Field Programmable Gate Array, field programmable gate array) or other programmable logic device, transistor logic device, hardware components, or any combination thereof. Which may implement or perform the various exemplary logic blocks, modules, and circuits described in connection with this disclosure. Processor 301 may also be a combination that implements computing functionality, e.g., comprising one or more microprocessor combinations, a combination of a DSP and a microprocessor, etc.
Bus 302 may include a path to transfer information between the components. Bus 302 may be a PCI (Peripheral Component Interconnect, peripheral component interconnect Standard) bus or an EISA (Extended Industry Standard Architecture ) bus, or the like. Bus 302 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in fig. 3, but not only one bus or one type of bus.
The Memory 303 may be, but is not limited to, a ROM (Read Only Memory) or other type of static storage device that can store static information and instructions, a RAM (Random Access Memory ) or other type of dynamic storage device that can store information and instructions, an EEPROM (Electrically Erasable Programmable Read Only Memory ), a CD-ROM (Compact Disc Read Only Memory, compact disc Read Only Memory) or other optical disk storage, optical disk storage (including compact discs, laser discs, optical discs, digital versatile discs, blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.
The memory 303 is used for storing application program codes for executing the present application and is controlled to be executed by the processor 301. The processor 301 is configured to execute the application code stored in the memory 303 to implement what is shown in the foregoing method embodiments.
Among them, electronic devices include, but are not limited to: mobile terminals such as mobile phones, notebook computers, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and the like, and stationary terminals such as digital TVs, desktop computers, and the like. The electronic device shown in fig. 3 is only an example and should not be construed as limiting the functionality and scope of use of the embodiments herein.
The present application provides a computer readable storage medium having a computer program stored thereon, which when run on a computer, causes the computer to perform the corresponding method embodiments described above.
It should be understood that, although the steps in the flowcharts of the figures are shown in order as indicated by the arrows, these steps are not necessarily performed in order as indicated by the arrows. The steps are not strictly limited in order and may be performed in other orders, unless explicitly stated herein. Moreover, at least some of the steps in the flowcharts of the figures may include a plurality of sub-steps or stages that are not necessarily performed at the same time, but may be performed at different times, the order of their execution not necessarily being sequential, but may be performed in turn or alternately with other steps or at least a portion of the other steps or stages.
The foregoing is only a partial embodiment of the present application, and it should be noted that, for a person skilled in the art, several improvements and modifications can be made without departing from the principle of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.
Claims (10)
1. The lithium battery voltage sequencing abnormality detection method is characterized by comprising the following steps of:
the acquisition step: in the charging stage and the discharging stage, collecting the voltage value of each single battery in two groups of battery packs to be tested at a preset frequency, wherein the two groups of battery packs are produced in the same batch by the same manufacturer;
and (3) counting: dividing two groups of battery packs to be tested, and independently counting the times of highest voltage value of each single battery in each group of battery packs to be tested;
the calculation steps are as follows: the calculation is based on the following formula:
wherein U is R 1 And R is 2 Smaller value of (2), and R 1 And R is 2 Respectively representing the frequency sum of the highest single voltage value in the two groups of battery packs;
n A and n B The number of the monomers with the highest monomer voltage values in the two groups of battery packs is respectively represented;
judging: if the z value is smaller than a preset threshold value, the voltages of the single batteries in the two groups of battery packs to be tested have sorting difference; if the z value is greater than or equal to a preset threshold value, the voltages of the single batteries in the two groups of battery packs to be tested are not different in sequence.
2. The method of claim 1, further comprising, prior to collecting the voltage value of each cell in the two sets of battery packs at a predetermined frequency:
two groups of battery packs are selected from n groups of battery packs to be detected as battery packs to be detected, wherein the n groups of battery packs are produced in the same batch by the same manufacturer, and n is a natural number greater than or equal to 2.
3. The method as recited in claim 2, further comprising:
when the voltages of the single batteries in the two groups of battery packs to be tested have sorting difference, reserving a reference group battery pack in the battery packs, and selecting one group battery pack from the rest group battery packs;
based on the reference battery pack and the selected battery pack, the "collecting step", "counting step", "calculating step", and "judging step" are performed.
4. The method as recited in claim 2, further comprising:
when the voltages of the single batteries in the two groups of battery packs to be tested are not different in sequence, any group of battery packs is reserved, and one group of battery packs is selected from the rest groups of battery packs;
based on the remaining battery packs and the selected battery pack, the "collecting step", "counting step", "calculating step", and "judging step" are performed.
5. A lithium battery voltage sequencing anomaly detection device, comprising:
the acquisition module is used for acquiring the voltage value of each single battery in two groups of battery packs to be detected at a preset frequency in a charging stage and a discharging stage, wherein the two groups of battery packs are produced in the same batch by the same manufacturer;
the statistics module is used for separately counting the times of highest voltage value of each single battery in each group of battery packs to be tested;
a calculation module for performing calculation based on the following formula:
wherein U is R 1 And R is 2 Smaller value of (2), and R 1 And R is 2 Respectively representing the frequency sum of the highest single voltage value in the two groups of battery packs;
n A and n B The number of the monomers with the highest monomer voltage values in the two groups of battery packs is respectively represented;
the judging module is used for determining that the voltages of the single batteries in the two groups of battery packs to be tested have sorting differences when the z value is smaller than a preset threshold value; when the z value is larger than or equal to a preset threshold value, determining that the voltages of the single batteries in the two groups of battery packs to be tested have no sorting difference.
6. The apparatus as recited in claim 5, further comprising:
the first selection module is used for selecting two groups of battery packs from n groups of battery packs to be detected as battery packs to be detected, wherein the n groups of battery packs are produced in the same batch by the same manufacturer, and n is a natural number greater than or equal to 2.
7. The apparatus as recited in claim 6, further comprising:
and the second selection module is used for reserving a reference battery pack when the voltages of the single batteries in the two battery packs to be tested are different in sequence, and selecting one battery pack from the rest battery packs.
8. The apparatus as recited in claim 6, further comprising:
and the third selection module is used for reserving any group of battery packs when the voltages of the single batteries in the two groups of battery packs to be tested are not different in sequence, and selecting one group of battery packs from the rest group of battery packs.
9. An electronic device comprising a memory and a processor, the memory having stored thereon a computer program, characterized in that the processor, when executing the computer program, implements the method according to any of claims 1-4.
10. A computer readable storage medium, on which a computer program is stored, which computer program, when being executed by a processor, implements the method according to any of claims 1 to 4.
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