Method, device and storage medium for determining lagging battery

Abstract

The present application provides a method, device and storage medium for determining backward batteries, which relates to the field of power supply technology and can conveniently and quickly determine backward batteries on the basis of ensuring accuracy. The method includes: obtaining battery information of multiple batteries in a target time period; determining a first battery library, a second battery library, and a third battery library according to the battery information of multiple batteries in the target time period; the first battery library includes batteries whose internal resistance abnormality times are greater than or equal to a first preset threshold in the target time period; the second battery library includes batteries whose voltage abnormality times are greater than or equal to a second preset threshold in the target time period; the third battery library includes batteries whose pole temperature is greater than or equal to a third preset threshold difference from the average pole temperature of multiple batteries; and determining that the batteries included in the first battery library, the second battery library, and the third battery library are backward batteries. The embodiment of the present application is used in the process of determining backward batteries.

Description

Technical Field

[0001] The present application relates to the field of power supply technology, and in particular to a method, device and storage medium for determining a lagging battery. Background Art

[0002] As a highly reliable power source, battery packs are widely used in power supply systems in various industries. However, after a period of use, lagging cells will appear in the battery pack. During the discharge process of the battery pack, the terminal voltage of the lagging battery drops faster. When the terminal voltage of any battery in the battery pack drops to the threshold, the entire battery pack will stop releasing the capacitance. It can be seen that the lagging battery will affect the capacity release of the battery, thereby shortening the service life of the battery. Therefore, identifying the lagging battery in the battery pack is the key to maintaining the battery pack.

[0003] At present, the main method for determining lagging batteries in a battery pack is the verification discharge method, which is as follows: a preset load is used to perform a verification discharge on each battery in the battery pack to determine the capacity of each battery, and when the capacity of the battery is lower than a preset capacity threshold, the battery is determined to be a lagging battery. However, the verification discharge method requires maintenance personnel to perform on-site operations on the battery, and also requires the equipment to have a backup battery, which will impose more restrictions on the verification discharge. Summary of the invention

[0004] The present application provides a method, device and storage medium for determining a backward battery, which solves the problem of many restrictions on determining backward batteries and determines that backward batteries can be determined conveniently and quickly while ensuring accuracy.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions:

[0006] In a first aspect, the present application provides a method for determining lagging batteries, the method comprising: obtaining battery information of multiple batteries in a target time period; the battery information comprises: internal resistance, voltage, and pole temperature; determining a first battery library, a second battery library, and a third battery library according to the battery information of the multiple batteries in the target time period; the first battery library includes batteries whose number of internal resistance abnormalities is greater than or equal to a first preset threshold value in the target time period; the second battery library includes batteries whose number of voltage abnormalities is greater than or equal to a second preset threshold value in the target time period; the third battery library includes batteries whose pole temperature differs from an average pole temperature of multiple batteries by a degree greater than or equal to a third preset threshold value; and determining that the batteries included in the first battery library, the second battery library, and the third battery library are lagging batteries.

[0007] In a possible implementation, the target time period includes: multiple first moments, multiple second moments, a third moment, and a fourth moment; the battery information includes: internal resistance at multiple first moments, voltage at multiple second moments, pole temperature at the third moment, and pole temperature at the fourth moment; the first moment is the moment when the battery is in a charging state; the second moment is the moment when the battery is in a discharging state; the third moment is the moment when the battery starts discharging; and the fourth moment is the moment when the battery ends discharging.

[0008] In one possible implementation, a first battery library is determined based on battery information of multiple batteries in a target time period, including: performing the following operations on the internal resistance of multiple batteries at each first moment to obtain batteries with abnormal internal resistance at each first moment; determining that the average value of the internal resistance of multiple batteries at the target first moment is the target average internal resistance; the target first moment is any first moment among the multiple first moments; determining batteries with abnormal internal resistance at the target first moment based on the internal resistance of multiple batteries at the target first moment and the target average internal resistance; determining the number of times each battery is marked as a battery with abnormal internal resistance based on the batteries with abnormal internal resistance at each first moment; and determining that the battery is a battery in the first battery library when the number of times it is marked as a battery with abnormal internal resistance is greater than or equal to a first preset threshold.

[0009] In one possible implementation, a battery with abnormal internal resistance at the target first moment is determined based on the internal resistance of multiple batteries at the target first moment and the target average internal resistance, including: performing the following operations on the internal resistance of each battery at the target first moment to determine the battery with abnormal internal resistance at the target first moment; determining the difference between the internal resistance of the target battery at the target first moment and the target average internal resistance, and the ratio of the internal resistance to the target average internal resistance is the first difference value of the target battery at the target first moment; the target battery is any one of the multiple batteries; when the first difference value is greater than or equal to a fourth preset threshold, marking the target battery as a battery with abnormal internal resistance.

[0010] In one possible implementation, a second battery library is determined based on battery information of multiple batteries in a target time period, including: determining that the sum of the voltages of multiple batteries at a preset second moment is a first voltage; the preset second moment is the moment with the earliest time sorting among multiple second moments; determining a battery with abnormal voltage at each second moment based on the voltages of multiple batteries at each second moment among the multiple second moments and the first voltage; determining the number of times each battery is marked as a battery with abnormal voltage based on the battery with abnormal voltage at each second moment; and determining that the battery is a battery in the second battery library when the number of times it is marked as a battery with abnormal voltage is greater than or equal to a second preset threshold.

[0011] In a possible implementation, based on the voltages of multiple batteries at each second moment among multiple second moments and the first voltage, determining the voltage-abnormal battery at each second moment, includes: performing the following operations on the voltages of multiple batteries at each second moment to obtain the voltage-abnormal battery at each second moment; determining that the difference between the voltages of multiple batteries at a target second moment and the voltages of multiple batteries at a preset second moment is the voltage drop of multiple batteries at the target second moment; the target second moment is any second moment among the multiple second moments; determining that the sum of the voltage drops of multiple batteries, and the difference with the first voltage is the second voltage; performing the following operations on the voltage of each battery at the target second moment to determine the voltage-abnormal battery at the target second moment; determining the difference between the voltage drop of the target battery and the second voltage, and the ratio of the voltage drop to the second voltage is the second difference value of the target battery; when the second difference value is greater than or equal to the fifth preset threshold, marking the target battery as a voltage-abnormal battery.

[0012] In one possible implementation, when the second difference value is greater than or equal to a fifth preset threshold, the target battery is marked as a battery with abnormal voltage, including: when the second difference value is greater than or equal to the fifth preset threshold, determining the target second difference value of the target battery; the target second difference value is the second difference value of the target battery at the last sampling moment; the last sampling moment is the second moment with the latest time order among multiple second moments; when the target second difference value is greater than or equal to a sixth preset threshold, marking the target battery as a battery with abnormal voltage.

[0013] In one possible implementation, a third battery pool is determined based on battery information of multiple batteries in a target time period, including: determining that an average value of pole temperatures of multiple batteries at a third moment is a first pole temperature, and determining an average value of pole temperatures of multiple batteries at a fourth moment is a second pole temperature; determining a difference between the pole temperature of the target battery at the third moment and the first pole temperature, and a ratio of a difference between the pole temperature of the target battery at the fourth moment and the second pole temperature as a third difference value of the target battery; when the third difference value is greater than or equal to a third preset threshold, determining that the target battery is a battery in the third battery pool.

[0014] In a second aspect, the present application provides a lagging battery determination device, the device comprising: a communication unit and a processing unit; the communication unit is used to obtain battery information of multiple batteries in a target time period; the battery information comprises: internal resistance, voltage, and pole temperature; the processing unit is used to determine a first battery library, a second battery library, and a third battery library according to the battery information of the multiple batteries in the target time period; the first battery library includes batteries whose internal resistance abnormality times are greater than or equal to a first preset threshold in the target time period; the second battery library includes batteries whose voltage abnormality times are greater than or equal to a second preset threshold in the target time period; the third battery library includes batteries whose pole temperature differs from the average pole temperature of multiple batteries by a degree greater than or equal to a third preset threshold; the processing unit is also used to determine that the batteries included in the first battery library, the second battery library, and the third battery library are lagging batteries.

[0015] In a possible implementation, the target time period includes: multiple first moments, multiple second moments, a third moment, and a fourth moment; the battery information includes: internal resistance at multiple first moments, voltage at multiple second moments, pole temperature at the third moment, and pole temperature at the fourth moment; the first moment is the moment when the battery is in a charging state; the second moment is the moment when the battery is in a discharging state; the third moment is the moment when the battery starts discharging; and the fourth moment is the moment when the battery ends discharging.

[0016] In one possible implementation, the processing unit is further used to perform the following operations on the internal resistance of multiple batteries at each first moment to obtain batteries with abnormal internal resistance at each first moment; determine the average value of the internal resistance of multiple batteries at the target first moment as the target average internal resistance; the target first moment is any first moment among the multiple first moments; determine the batteries with abnormal internal resistance at the target first moment based on the internal resistance of multiple batteries at the target first moment and the target average internal resistance; the processing unit is further used to determine the number of times each battery is marked as a battery with abnormal internal resistance based on the batteries with abnormal internal resistance at each first moment; when the number of times marked as a battery with abnormal internal resistance is greater than or equal to a first preset threshold, the processing unit is further used to determine that the battery is a battery in the first battery library.

[0017] In one possible implementation, the processing unit is also used to perform the following operations on the internal resistance of each battery at the target first moment: determining a battery with abnormal internal resistance at the target first moment; determining the difference between the internal resistance of the target battery at the target first moment and the target average internal resistance, and the ratio of the internal resistance to the target average internal resistance is the first difference value of the target battery at the target first moment; the target battery is any one of the multiple batteries; when the first difference value is greater than or equal to a fourth preset threshold, marking the target battery as a battery with abnormal internal resistance.

[0018] In one possible implementation, the processing unit is further used to determine that the sum of the voltages of multiple batteries at a preset second moment is a first voltage; the preset second moment is the moment with the earliest time order among the multiple second moments; the processing unit is further used to determine the voltage-abnormal battery at each second moment according to the voltages of the multiple batteries at each second moment among the multiple second moments and the first voltage; the processing unit is further used to determine the number of times each battery is marked as a voltage-abnormal battery based on the voltage-abnormal battery at each second moment; when the number of times it is marked as a voltage-abnormal battery is greater than or equal to a second preset threshold, the processing unit is further used to determine that the battery is a battery in a second battery library.

[0019] In one possible implementation, the processing unit is also used to perform the following operations on the voltages of multiple batteries at each second moment to obtain voltage-abnormal batteries at each second moment; determine that the difference between the voltages of multiple batteries at a target second moment and the voltages of multiple batteries at a preset second moment is the voltage drop of multiple batteries at the target second moment; the target second moment is any second moment among the multiple second moments; determine that the sum of the voltage drops of multiple batteries, and the difference with the first voltage is the second voltage; the processing unit is also used to perform the following operations on the voltage of each battery at the target second moment to determine the voltage-abnormal battery at the target second moment; determine the difference between the voltage drop of the target battery and the second voltage, and the ratio to the second voltage is the second difference value of the target battery; when the second difference value is greater than or equal to the fifth preset threshold, mark the target battery as a voltage-abnormal battery.

[0020] In one possible implementation, when the second difference value is greater than or equal to a fifth preset threshold, the processing unit is further used to determine a target second difference value of the target battery; the target second difference value is the second difference value of the target battery at the last sampling moment; the last sampling moment is the second moment with the latest time order among multiple second moments; when the target second difference value is greater than or equal to a sixth preset threshold, the processing unit is further used to mark the target battery as a battery with abnormal voltage.

[0021] In one possible implementation, the processing unit is further used to determine that the average value of the pole temperatures of multiple batteries at a third moment is the first pole temperature, and to determine that the average value of the pole temperatures of multiple batteries at a fourth moment is the second pole temperature; the processing unit is further used to determine that the difference between the pole temperature of the target battery at the third moment and the first pole temperature, and the ratio of the difference between the pole temperature of the target battery at the fourth moment and the second pole temperature is the third difference value of the target battery; when the third difference value is greater than or equal to the third preset threshold value, the processing unit is further used to determine that the target battery is a battery in a third battery library.

[0022] In a third aspect, the present application provides a lagging battery determination device, the device comprising: a processor and a communication interface; the communication interface and the processor are coupled, and the processor is used to run a computer program or instructions to implement a lagging battery determination method as described in the first aspect and any possible implementation of the first aspect.

[0023] In a fourth aspect, the present application provides a computer-readable storage medium, in which instructions are stored. When the instructions are executed on a terminal, the terminal executes the backward battery determination method described in the first aspect and any possible implementation of the first aspect.

[0024] In a fifth aspect, the present application provides a computer program product comprising instructions. When the computer program product runs on a lagging battery determination device, the lagging battery determination device executes the lagging battery determination method as described in the first aspect and any possible implementation manner of the first aspect.

[0025] In a sixth aspect, the present application provides a chip, comprising a processor and a communication interface, wherein the communication interface and the processor are coupled, and the processor is used to run a computer program or instructions to implement the lagging battery determination method as described in the first aspect and any possible implementation of the first aspect.

[0026] Specifically, the chip provided in the present application also includes a memory for storing computer programs or instructions.

[0027] The above technical solution brings at least the following beneficial effects: the backward battery determination method provided by the present application, the backward battery determination device can first obtain the battery information (i.e., internal resistance, voltage, and pole temperature) of multiple batteries in the target time period, and then determine three battery libraries (i.e., the first battery library, the second battery library, and the third battery library) based on the three dimensions of internal resistance, voltage, and pole temperature. Then, the backward battery determination device determines that the batteries included in the above multiple battery libraries are backward batteries. The backward batteries determined in this way are batteries with many abnormalities in the three parameters of internal resistance, voltage, and pole temperature, thereby ensuring the accuracy of the backward batteries. Compared with the prior art, the backward battery determination method provided by the present application does not need to be limited to the scenario with spare batteries, and does not require operation and maintenance personnel to go to the site for detection, thereby enabling the backward battery determination device to conveniently and quickly determine the backward batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A structural diagram of a lagging battery determination device provided in an embodiment of the present application;

[0029] Figure 2 A flowchart of a method for determining a lagging battery provided in an embodiment of the present application;

[0030] Figure 3 A schematic diagram of a backward battery provided in an embodiment of the present application;

[0031] Figure 4 A flowchart of another lagging battery determination method provided in an embodiment of the present application;

[0032] Figure 5 A flowchart of another lagging battery determination method provided in an embodiment of the present application;

[0033] Figure 6 A relationship diagram between temperature and internal resistance provided in an embodiment of the present application;

[0034] Figure 7 A flowchart of another lagging battery determination method provided in an embodiment of the present application;

[0035] Figure 8 A flowchart of another lagging battery determination method provided in an embodiment of the present application;

[0036] Fig. 9 A flowchart of another lagging battery determination method provided in an embodiment of the present application;

[0037] Fig.10 A flowchart of another lagging battery determination method provided in an embodiment of the present application;

[0038] Fig.11 A schematic diagram of the structure of another lagging battery determination device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0039] The following is a detailed description of the lagging battery determination method, device and storage medium provided in the embodiments of the present application in conjunction with the accompanying drawings.

[0040] The term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0041] The terms "first" and "second" and the like in the specification and drawings of this application are used to distinguish different objects, or to distinguish different processing of the same object, rather than to describe a specific order of objects.

[0042] In addition, the terms "including" and "having" and any variations thereof mentioned in the description of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include other steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

[0043] It should be noted that, in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0044] In the description of the present application, unless otherwise specified, “plurality” means two or more.

[0045] Figure 1 This is a schematic diagram of the structure of a device for determining a lagging battery provided in an embodiment of the present application. Figure 1 As shown, the lagging battery determination device 100 includes: at least one processor 101, a communication line 102, and at least one communication interface 104, and may also include a memory 103. The processor 101, the memory 103 and the communication interface 104 may be connected via the communication line 102.

[0046] The processor 101 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application, such as one or more digital signal processors (DSP), or one or more field programmable gate arrays (FPGA).

[0047] The communication link 102 may include a pathway for transmitting information between the above-mentioned components.

[0048] The communication interface 104 is used to communicate with other devices or communication networks, and can use any transceiver-like device, such as Ethernet, radio access network (RAN), wireless local area network (WLAN), etc.

[0049] The memory 103 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, an optical disc storage (including a compressed optical disc, a laser disc, an optical disc, a digital versatile disc, a Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to include or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0050] In one possible design, the memory 103 can exist independently of the processor 101, that is, the memory 103 can be a memory outside the processor 101. In this case, the memory 103 can be connected to the processor 101 through the communication line 102, and is used to store execution instructions or application code, and the processor 101 controls the execution to implement the software upgrade method provided in the following embodiment of the present application. In another possible design, the memory 103 can also be integrated with the processor 101, that is, the memory 103 can be the internal memory of the processor 101, for example, the memory 103 is a high-speed cache, which can be used to temporarily store some data and instruction information.

[0051] As an implementation method, the processor 101 may include one or more CPUs, for example Figure 1 As another possible implementation, the lagging battery determination device 100 may include multiple processors, such as Figure 1 As another implementation, the lagging battery determination apparatus 100 may further include an output device 105 and an input device 106.

[0052] Optionally, the lagging battery determination device 100 can be applied to access network equipment, equipment rooms (eg, convergence rooms, core rooms, etc.), data centers, and other equipment.

[0053] It should be pointed out that Figure 1 The structure shown in the figure does not constitute a limitation on the lagging battery determination device, except Figure 1 In addition to the components shown, the lagging battery determination device may include more or fewer components than shown, or combine certain components, or arrange the components differently.

[0054] As a highly reliable power source, battery packs are widely used in power supply systems in various industries. However, after a period of use, lagging cells will appear in the battery pack. During the discharge process of the battery pack, the terminal voltage of the lagging battery drops faster. When the terminal voltage of any battery in the battery pack drops to the threshold, the entire battery pack will stop releasing the capacitance. It can be seen that the lagging battery will affect the capacity release of the battery, thereby shortening the service life of the battery. Therefore, identifying the lagging battery in the battery pack is the key to maintaining the battery pack.

[0055] At present, the main method for determining lagging batteries in a battery pack is the verification discharge method, which is as follows: a preset load is used to perform a verification discharge on each battery in the battery pack to determine the capacity of each battery, and when the capacity of the battery is lower than a preset capacity threshold, the battery is determined to be a lagging battery. However, the verification discharge method requires maintenance personnel to perform on-site operations on the battery, and also requires the equipment to have a backup battery, which will impose more restrictions on the verification discharge.

[0056] In order to solve the problems existing in the above-mentioned prior art, the present application embodiment proposes a method for determining a lagging battery, which can conveniently and quickly determine the lagging battery. Figure 2 As shown, the method includes:

[0057] S201. A lagging battery determination device obtains battery information of multiple batteries in a target time period.

[0058] Among them, battery information includes: internal resistance, voltage, and pole temperature.

[0059] In a possible implementation, the target time period includes: multiple first moments, multiple second moments, a third moment, and a fourth moment. The battery information includes: internal resistance at multiple first moments, voltage at multiple second moments, pole temperature at the third moment, and pole temperature at the fourth moment. The first moment is the moment when the battery is in a charging state. The second moment is the moment when the battery is in a discharging state. The third moment is the moment when the battery starts discharging. The fourth moment is the moment when the battery ends discharging.

[0060] In combination with the above implementation, the voltages at multiple second moments can be displayed in a matrix manner. For example, taking the multiple second moments including i+1 second moments as an example, the voltage at the above i+1 second moment can be: Among them, t is used to represent the time, and u is used to represent the voltage of the battery.

[0061] Optionally, the charging state may include at least one of the following: a floating charging state and an equalizing charging state. The above is only an exemplary description of the charging state, and the charging state may include other charging states, which is not limited in this application.

[0062] In some examples, the battery may also be referred to as a storage battery. The battery includes at least one of the following: a valve-regulated sealed lead-acid storage battery and a high-rate valve-regulated sealed lead-acid storage battery. The above are only two exemplary descriptions of batteries, and the battery may also be other batteries, and this application does not impose any limitation on the comparison.

[0063] S202: The lagging battery determining device determines a first battery bank, a second battery bank, and a third battery bank according to battery information of a plurality of batteries in a target time period.

[0064] The first battery pool includes batteries whose number of internal resistance anomalies is greater than or equal to a first preset threshold value in the target time period. The second battery pool includes batteries whose number of voltage anomalies is greater than or equal to a second preset threshold value in the target time period. The third battery pool includes batteries whose pole temperature differs from the average pole temperature of multiple batteries by more than or equal to a third preset threshold value.

[0065] As an optional implementation, the implementation process of the lagging battery determination device in S202 determining the first battery library according to the battery information of multiple batteries in the target time period can be: the lagging battery determination device can first determine the number of abnormal internal resistance of each of the multiple batteries in the target time period according to the battery information of the multiple batteries in the target time period (for example, the number of abnormal internal resistance is the number of times the battery is marked as abnormal internal resistance), and then determine the batteries whose number of abnormal internal resistance is greater than or equal to the first preset threshold in the target time period based on the number of abnormal voltage of each battery. Then, the lagging battery determination device determines the first battery library based on the batteries whose number of abnormal internal resistance is greater than or equal to the first preset threshold in the target time period.

[0066] As a possible implementation, the implementation process of the lagging battery determination device in S202 determining the second battery library according to the battery information of multiple batteries in the target time period can be: the lagging battery determination device can first determine the number of voltage abnormalities of each of the multiple batteries in the target time period according to the battery information of the multiple batteries in the target time period (for example, the number of internal resistance abnormalities is the number of times the battery is marked as voltage abnormal), and then determine the batteries whose voltage abnormality number is greater than or equal to the second preset threshold in the target time period based on the voltage abnormality number of each battery. Then, the lagging battery determination device determines the second battery library based on the batteries whose voltage abnormality number is greater than or equal to the second preset threshold in the target time period.

[0067] As a possible implementation method, the implementation process of the lagging battery determination device in S202 determining the third battery library based on the battery information of multiple batteries in the target time period can be: the lagging battery determination device can first determine the average value of the pole temperature of multiple batteries in the target time period as the average pole temperature, and then determine the difference of each battery based on the pole temperature of each battery in the target time period and the average pole temperature. Then, the lagging battery determination device selects batteries (recorded as abnormal pole temperature batteries) whose difference is greater than or equal to the third preset threshold from the multiple batteries, and determines the third battery library based on the abnormal pole temperature batteries.

[0068] S203: The backward battery determining device determines that the batteries included in the first battery library, the second battery library, and the third battery library are backward batteries.

[0069] In an optional implementation, after S203, the backward battery determination device may replace the backward battery with a normal battery.

[0070] Optional, such as Figure 3 As shown, the lagging battery determining device may determine that the batteries included in both the first battery bank and the second battery bank are secondary lagging batteries.

[0071] Also optional, such as Figure 3 As shown, the lagging battery determining device may select batteries included in both the first battery bank and the third battery bank, and batteries included in both the second battery bank and the third battery bank as the warning lagging batteries.

[0072] Also optional, such as Figure 3 As shown, the lagging battery determining device may identify batteries in the first battery bank, batteries in the second battery bank, and batteries in the third battery bank as lagging batteries to be concerned.

[0073] Understandably, Figure 3Compared with the existing voltage measurement method (i.e., measuring the voltage of the battery through a multimeter, and the battery with a voltage lower than a preset threshold is a lagging battery), the lagging battery determination method shown not only refers to the information of the voltage dimension, but also combines the information of the two dimensions of internal resistance and pole temperature, thereby improving the accuracy of determining the lagging battery.

[0074] The above technical solution brings at least the following beneficial effects: the backward battery determination method provided by the present application, the backward battery determination device can first obtain the battery information (i.e., internal resistance, voltage, and pole temperature) of multiple batteries in the target time period, and then determine three battery libraries (i.e., the first battery library, the second battery library, and the third battery library) based on the three dimensions of internal resistance, voltage, and pole temperature. Then, the backward battery determination device determines that the batteries included in the above multiple battery libraries are backward batteries. The backward batteries determined in this way are batteries with many abnormalities in the three parameters of internal resistance, voltage, and pole temperature, thereby ensuring the accuracy of the backward batteries. Compared with the prior art, the backward battery determination method provided by the present application does not need to be limited to the scenario with spare batteries, and does not require operation and maintenance personnel to go to the site for detection, thereby enabling the backward battery determination device to conveniently and quickly determine the backward batteries.

[0075] In an optional embodiment, as shown in S202, the lagging battery determination device determines the first battery bank, the second battery bank, and the third battery bank according to the battery information of the plurality of batteries in the target time period. Figure 2 Based on the method embodiment shown, this embodiment provides a possible implementation method, such as Figure 4 As shown, Figure 4 Another lagging battery determination method provided by the present application, therefore, the implementation process of the lagging battery determination device determining the first battery library according to the battery information of multiple batteries in the target time period may include the following steps S401 to S404.

[0076] S401. The lagging battery determination device performs the following S4011 to S4012 on the internal resistance of multiple batteries at each first moment to obtain the battery with abnormal internal resistance at each first moment.

[0077] Optionally, each of the two closest first moments may be 15 minutes apart. Exemplarily, the multiple first moments may include: January 1, 20XX -3:00, January 1, 20XX -3:15, January 1, 20XX -3:30, January 1, 20XX -3:45, and January 1, 20XX -4:00.

[0078] S4011. The lagging battery determination device determines an average value of the internal resistances of a plurality of batteries at a target first moment as a target average internal resistance.

[0079] The target first moment is any first moment among multiple first moments.

[0080] Exemplarily, taking the above example that the internal resistances of the multiple batteries at the target first moment are 90 milliohms, 92 milliohms, 95 milliohms, 98 milliohms, and 120 milliohms respectively, the target average internal resistance is 99 milliohms.

[0081] S4012. The lagging battery determining device determines a battery with abnormal internal resistance at the target first moment according to the internal resistances of the plurality of batteries at the target first moment and the target average internal resistance.

[0082] As an optional implementation method, the implementation process of the above S4012 can be: the lagging battery determination device can determine the degree of difference between the internal resistance of each battery and the target average internal resistance at the target first moment (i.e., the first difference value), and when the above first difference value is greater than or equal to the fourth preset threshold value, determine that the battery is an abnormal internal resistance battery at the target first moment.

[0083] S402: The lagging battery determining device determines the number of times each battery is marked as a battery with abnormal internal resistance based on the batteries with abnormal internal resistance at each first moment.

[0084] Exemplarily, taking the abnormal internal resistance batteries at the first moment #1 as battery #1, battery #2, and battery #3, the abnormal internal resistance batteries at the first moment #2 as battery #2, battery #3, and battery #4, and the abnormal internal resistance batteries at the first moment #3 as battery #2, battery #3, and battery #5 as an example: the lagging battery determination device can determine that at the above three first moments (i.e., the first moment #1, the first moment #2, and the first moment #3), battery #1 is marked as an abnormal internal resistance battery 1 time, battery #2 is marked as an abnormal internal resistance battery 3 times, battery #3 is marked as an abnormal internal resistance battery 3 times, battery #4 is marked as an abnormal internal resistance battery 1 time, and battery #5 is marked as an abnormal internal resistance battery 1 time.

[0085] S403: The lagging battery determination device determines whether the number of times the battery is marked as having abnormal internal resistance is greater than or equal to a first preset threshold.

[0086] As an optional implementation method, the implementation process of the lagging battery determination device determining the first preset threshold value can be: the lagging battery determination device can sort the above-mentioned multiple batteries in descending order based on the number of times they are marked as having abnormal internal resistance, to obtain a first sequence, and from the above-mentioned first sequence, the number of times the Nth battery is marked as a battery with abnormal internal resistance is the first preset threshold value.

[0087] Optionally, the lagging battery determination device may determine N based on the number of multiple batteries and a preset ratio. For example, when the number of multiple batteries is 24 and the preset ratio is 10%, the lagging battery determination device may determine N to be 3. For another example, when the number of multiple batteries is 30 and the preset ratio is 10%, the lagging battery determination device may determine N to be 3. The above preset ratio may be set by the lagging battery determination device according to actual conditions, and this application does not impose any restrictions on this.

[0088] If the number of times the battery is marked as having abnormal internal resistance is less than the first preset threshold, the lagging battery determination device does not mark the battery and ends the process.

[0089] If the number of times the battery is marked as having abnormal internal resistance is greater than or equal to the first preset threshold, the lagging battery determination device executes S404.

[0090] S404: The lagging battery determining device determines that the battery is a battery in the first battery bank.

[0091] Optionally, the batteries in the first battery bank can be based on the above Figure 3 The method shown is dynamically refreshed. If the lagging battery determination device determines that the batteries in the first battery library include: battery #6 and battery #7 based on the battery information of time period #1, and the lagging battery determination device determines that the batteries in the first battery library include: battery #6 and battery #8 based on the battery information of time period #2 (time period #2 is later than time period #1), then if the above-mentioned battery #7 is not eliminated, the first battery library may include battery #6, battery #7, and battery #8, and if the above-mentioned battery #7 is eliminated, the first battery library may include battery #6 and battery #8.

[0092] The above technical solution brings at least the following beneficial effects: the lagging battery determination method provided by the present application, the lagging battery determination device can first determine the average value of the internal resistance of multiple batteries at any first moment as the average internal resistance, and then determine the battery with abnormal internal resistance at the first moment based on the internal resistance of multiple batteries at the first moment and the average internal resistance, until the battery with abnormal internal resistance at each first moment in the above multiple first moments is determined. The lagging battery determination device determines the number of times each battery is marked as a battery with abnormal internal resistance based on the battery with abnormal internal resistance at each first moment, and determines that the battery is a battery in the first battery library when the number is greater than or equal to the first preset threshold value. In this way, the lagging battery determination device of the present application determines the batteries in the first battery library based on the internal resistance of the batteries at multiple first moments, not the batteries in the first battery library determined based on the internal resistance of the batteries at one moment alone, thereby improving the accuracy of determining the first battery library.

[0093] In an optional embodiment, as shown in S4012, the lagging battery determination device determines the battery with abnormal internal resistance at the target first moment according to the internal resistance of multiple batteries at the target first moment and the target average internal resistance, and Figure 4 Based on the method embodiment shown, this embodiment provides a possible implementation method, such as Figure 5 As shown, Figure 5 Another lagging battery determination method provided in the present application, therefore, the lagging battery determination device determines the implementation process of the battery with abnormal internal resistance at the target first moment according to the internal resistance of multiple batteries at the target first moment and the target average internal resistance, which may include the following steps S501 to S503.

[0094] The lagging battery determination device performs the following steps S5011 to S5013 on the internal resistance of each battery at the target first time, and determines a battery with abnormal internal resistance at the target first time.

[0095] S501. A lagging battery determining device determines a difference between an internal resistance of a target battery at a target first moment and a target average internal resistance, and a ratio of the difference to the target average internal resistance is a first difference value of the target battery at the target first moment.

[0096] The target battery is any one of the multiple batteries.

[0097] In a possible implementation, the first difference value may satisfy the following formula 1:

[0098]

[0099] Among them, s j is the first difference value of the target battery at the target first moment. j is the internal resistance of the target battery at the target first moment. is the target average internal resistance.

[0100] S502: The lagging battery determination device determines whether the first difference value is greater than or equal to a fourth preset threshold.

[0101] Optionally, the fourth preset threshold may be set by the lagging battery determining device according to actual conditions. For example, the lagging battery determining device sets the fourth preset threshold to 30%, and the present application does not impose any limitation on this.

[0102] If the first difference value is less than the fourth preset threshold, the lagging battery determination device determines that the target battery is a battery with normal internal resistance.

[0103] If the first difference value is greater than or equal to the fourth preset threshold, the lagging battery determination apparatus executes S503.

[0104] S503: The lagging battery determination device marks the target battery as a battery with abnormal internal resistance.

[0105] Optionally, before S503, the lagging battery determination device may also obtain the temperature of the environment where the battery is located at the target time. However, the internal resistance of the battery will change with the change of the ambient temperature, for example, Figure 6 As shown, when the ambient temperature of the battery is within the range of -10 degrees Celsius (℃) to -30 degrees Celsius, the internal resistance of the battery will undergo a large mutation. Therefore, if the temperature of the battery environment at the target time is not within the range of -10 degrees Celsius (℃) to -30 degrees Celsius, the lagging battery determination device marks the target battery as a battery with abnormal internal resistance; if the temperature of the battery environment at the target time is within the range of -10 degrees Celsius (℃) to -30 degrees Celsius, the lagging battery determination device does not mark the target battery as a battery with abnormal internal resistance.

[0106] The above technical solution brings at least the following beneficial effects: in the lagging battery determination method provided by the present application, the lagging battery determination device first determines the difference between the internal resistance of the target battery (i.e., any one of the multiple batteries) at the target first moment and the target average internal resistance, and the ratio of the internal resistance to the target average internal resistance is the first difference value of the target battery at the target first moment, and when the above first difference value is greater than or equal to the fourth preset threshold, the target battery is marked as an abnormal internal resistance battery, until each of the above multiple batteries is determined, and the abnormal internal resistance battery at the target first moment is obtained, which provides a data basis for the subsequent lagging battery determination device to determine the number of times each battery is marked as an abnormal internal resistance battery based on the abnormal internal resistance battery at the first moment.

[0107] In an optional embodiment, as shown in S202, the lagging battery determination device determines the first battery bank, the second battery bank, and the third battery bank according to the battery information of the plurality of batteries in the target time period. Figure 2 Based on the method embodiment shown, this embodiment provides a possible implementation method, such as Figure 7 As shown, Figure 7 Another lagging battery determination method provided by the present application, therefore, the implementation process of the lagging battery determination device determining the second battery library according to the battery information of multiple batteries in the target time period may include the following steps S701 to S705.

[0108] S701. A lagging battery determining device determines a sum of voltages of a plurality of batteries at a preset second moment as a first voltage.

[0109] The preset second moment is the moment with the earliest time order among the multiple second moments.

[0110] In a possible implementation, the first voltage may satisfy the following formula 2:

[0111]

[0112] Among them, U 0 is the first voltage. 0,j is the voltage of the jth battery at the preset second moment. J is a positive integer.

[0113] S702: The lagging battery determining device determines a battery with abnormal voltage at each second moment according to the voltages of the plurality of batteries at each second moment among the plurality of second moments and the first voltage.

[0114] As an optional implementation, the implementation process of the above S702 may be: the lagging battery determination device first determines the voltage drop of the multiple batteries based on the difference between the voltage of the multiple batteries at the target second moment and the voltage of the multiple batteries at the preset second moment, and then determines the second difference value of each battery based on the voltage drop of the multiple voltages and the first voltage. Then, when the second difference value is greater than or equal to the fifth preset threshold, the lagging battery determination device marks the target battery as a battery with abnormal voltage until the battery with abnormal voltage at each of the above second moments is determined.

[0115] Optionally, each of the two closest second moments may be separated by 10 seconds. Exemplarily, the multiple first moments may include: January 1, 20XX -3:00:10, January 1, 20XX -3:00:20, January 1, 20XX -3:00:30, January 1, 20XX -3:00:40, and January 1, 20XX -3:00:50.

[0116] S703: The lagging battery determining device determines the number of times each battery is marked as a battery with abnormal voltage based on the batteries with abnormal voltage at each second moment.

[0117] Optionally, the above S703 can be understood with reference to the above S402, which will not be repeated here.

[0118] S704: The lagging battery determination device determines whether the number of times the battery is marked as having abnormal voltage is greater than or equal to a second preset threshold.

[0119] If the number of times the battery is marked as having abnormal voltage is less than the first preset threshold, the lagging battery determination device does not mark the battery and ends the process.

[0120] If the number of times the battery is marked as having abnormal voltage is greater than or equal to the first preset threshold, the lagging battery determination apparatus executes S705.

[0121] S705: The lagging battery determining device determines that the battery is a battery in the second battery bank.

[0122] Optionally, the batteries in the second battery bank may also be dynamically refreshed. The implementation process of the lagging battery determination device dynamically refreshing the batteries in the second battery bank can be referred to the implementation process of the lagging battery determination device dynamically refreshing the batteries in the second battery bank, which will not be repeated here.

[0123] The above technical solution brings at least the following beneficial effects: the backward battery determination method provided by the present application, the backward battery determination device can first determine that the sum of the voltages of multiple batteries at a preset second moment is the first voltage, and then determine the voltage abnormal battery at each second moment based on the voltage of multiple batteries at each second moment and the first voltage. The backward battery determination device determines the number of times each battery is marked as a voltage abnormal battery based on the voltage abnormal battery at each second moment, and determines that the battery is a battery in the second battery library when the number of times it is marked as a voltage abnormal battery is greater than or equal to the second preset threshold value. In this way, the backward battery determination device of the present application determines the batteries in the second battery library based on the voltages of the batteries at multiple second moments, not the batteries in the second battery library determined based solely on the battery voltage at one moment, thereby improving the accuracy of determining the second battery library.

[0124] In an optional embodiment, as shown in S702, the lagging battery determination device determines the abnormal voltage battery at each second moment according to the voltage of the plurality of batteries at each second moment in the plurality of second moments and the first voltage, Figure 7 Based on the method embodiment shown, this embodiment provides a possible implementation method, such as Figure 8 As shown, Figure 8 Another lagging battery determination method provided in the present application, therefore, the lagging battery determination device determines the implementation process of the abnormal voltage battery at each second moment according to the voltage of multiple batteries at each second moment in multiple second moments and the first voltage, which may include the following steps S801 to S803.

[0125] The lagging cell determining device performs the following steps S801 to S803 on the voltages of the plurality of cells at each second time, and obtains a cell with abnormal voltage at each second time.

[0126] S801. A lagging battery determining device determines that a difference between voltages of a plurality of batteries at a target second moment and voltages of a plurality of batteries at a preset second moment is a voltage drop of the plurality of batteries at the target second moment.

[0127] The target second moment is any second moment among multiple second moments.

[0128] In a possible implementation, the voltage drop of the above battery can satisfy the following formula 3:

[0129] ΔUi,j =|u i,j -u 0,j | Formula 3

[0130] Among them, ΔU i,j is the voltage drop of the jth battery among the multiple batteries at the target second moment. i,j is the voltage of the jth battery among the multiple batteries at the target second moment. 0,j is the voltage of the jth battery among the multiple batteries at the preset second moment.

[0131] In one example, the voltage of the battery described in this application may be the terminal voltage of the battery.

[0132] S802: The lagging battery determining device determines a second voltage as a difference between a sum of voltage drops of a plurality of batteries and a first voltage.

[0133] In a possible implementation, the second voltage may satisfy the following formula 4:

[0134]

[0135] Among them, ΔU i is the second voltage.

[0136] S803. The lagging battery determining device performs the following steps S8031 to S8033 on the voltage of each battery at the target second time, and determines the battery with abnormal voltage at the target second time.

[0137] Optionally, the target second moment may be understood by referring to the description of the corresponding position above, which will not be repeated here.

[0138] S8031. The lagging battery determining device determines a difference between a voltage drop of a target battery and a second voltage, and a ratio of the voltage drop to the second voltage is a second difference value of the target battery.

[0139] In a possible implementation, the second difference value may satisfy the following formula 5:

[0140]

[0141] Among them, K i,j is a second difference value of the j-th battery among the multiple batteries at the target second moment.

[0142] S8032: The lagging battery determination device determines whether the second difference value is greater than or equal to a fifth preset threshold.

[0143] In an optional implementation, the implementation process of the lagging battery determination device determining the fifth preset threshold value may be: the lagging battery determination device determines that the largest second difference value among the second difference values ​​of the plurality of batteries is the fifth preset threshold value. Since the largest second difference value among the second difference values ​​of the plurality of batteries is different at different second moments, the fifth preset threshold value is different at different second moments.

[0144] If the second difference value is less than the fifth preset threshold, the lagging battery determining device determines that the target battery is a battery with normal voltage.

[0145] If the second difference value is greater than or equal to the fifth preset threshold, the lagging battery determination apparatus executes S8033.

[0146] S8033. The lagging battery determination device marks the target battery as a battery with abnormal voltage.

[0147] Optionally, before the above S8033, the lagging battery determination device may also determine a second difference value of the target battery at the last second moment among the above multiple second moments, and determine that the target battery is an abnormal battery when the second difference value is greater than or equal to a sixth preset threshold.

[0148] The above technical solution brings at least the following beneficial effects: In the lagging battery determination method provided by the present application, the lagging battery determination device first determines the difference between the voltage of multiple batteries at the target second moment and the voltage of multiple batteries at the preset second moment as the voltage drop of multiple batteries at the target second moment, and determines the sum of the voltage drops of multiple batteries, and the difference with the first voltage as the second voltage. Then. The lagging battery determination device determines the difference between the voltage drop of the target battery and the second voltage, and the ratio to the second voltage is the second difference value of the target battery, and when the second difference value is greater than or equal to the fifth preset threshold, the target battery is marked as a voltage abnormal battery, until each of the above multiple batteries is determined, and the voltage abnormal battery at the target second moment is obtained, which provides a data basis for the subsequent lagging battery determination device to determine the number of times each battery is marked as a voltage abnormal battery based on the voltage abnormal battery at the second moment.

[0149] In an optional embodiment, when the second difference value is greater than or equal to the fifth preset threshold, the lagging battery determination device may mark the target battery as a battery with abnormal voltage (ie, S8033). Figure 8 Based on the method embodiment shown, this embodiment provides a possible implementation method, such as Fig. 9 As shown, Fig. 9Another lagging battery determination method provided by the present application, therefore, when the second difference value is greater than or equal to the fifth preset threshold, the implementation process of the lagging battery determination device marking the target battery as a battery with abnormal voltage may include the following steps S901 to S904.

[0150] S901. A lagging battery determining device determines a target second difference value of a target battery.

[0151] The target second difference value is the second difference value of the selected battery at the last sampling time. The last sampling time is the second time with the latest time sequence among the multiple second times.

[0152] Optionally, the implementation process of determining the second difference value may refer to the above Figure 7 The implementation process shown in FIG. 1 is understood for simplicity and will not be described in detail here.

[0153] S902: The lagging battery determination device determines whether the target second difference value is greater than or equal to a sixth preset threshold.

[0154] Optionally, the implementation process of determining the sixth preset threshold may be understood by referring to the implementation process of determining the fifth preset threshold, which will not be described in detail here.

[0155] If the target second difference value is less than the sixth preset threshold, the lagging battery determining device determines that the target battery is a battery with normal voltage.

[0156] If the target second difference value is greater than or equal to the sixth preset threshold, the lagging battery determination apparatus executes S903 .

[0157] S903: The lagging battery determination device marks the target battery as a battery with abnormal voltage.

[0158] It is understandable that, since the voltage of the battery may change suddenly as the discharge time increases, the probability of the voltage of the battery changing suddenly is relatively high at the last sampling moment among the above-mentioned multiple second moments. Based on the above reasons, before the lagging battery determination device determines the target battery as a battery with abnormal voltage, determining whether the target second difference value of the target battery is greater than or equal to the sixth preset threshold value can effectively improve the accuracy of determining the battery with abnormal voltage.

[0159] The above technical solution brings at least the following beneficial effects: in the lagging battery determination method provided by the present application, when the second difference value is greater than or equal to the fifth preset threshold value, the lagging battery determination device first determines the target second difference value of the target battery, and when the target second difference value is greater than or equal to the sixth preset threshold value, marks the target battery as a voltage abnormal battery. In this way, in the process of determining the voltage abnormal battery, the influence of the discharge time on the voltage is considered, thereby effectively improving the accuracy of determining the voltage abnormal battery.

[0160] In an optional embodiment, as shown in S202, the lagging battery determination device determines the first battery bank, the second battery bank, and the third battery bank according to the battery information of the plurality of batteries in the target time period. Figure 2 Based on the method embodiment shown, this embodiment provides a possible implementation method, such as Fig.10 As shown, Fig.10 Another lagging battery determination method provided by the present application, therefore, the implementation process of the lagging battery determination device determining the third battery bank according to the battery information of multiple batteries in the target time period may include the following steps S1001 to S1004.

[0161] S1001. A lagging battery determination device determines that an average value of pole temperatures of a plurality of batteries at a third moment is a first pole temperature, and determines that an average value of pole temperatures of a plurality of batteries at a fourth moment is a second pole temperature.

[0162] For example, the pole temperatures of the plurality of batteries at the third moment are 18° C., 19° C., 20° C., 21° C., and 22° C., respectively, and the first pole temperature is 20° C. For example, the pole temperatures of the plurality of batteries at the third moment are 28° C., 29° C., 30° C., 31° C., and 32° C., respectively, and the second pole temperature is 30° C.

[0163] S1002. The lagging battery determination device determines a ratio of a difference between a pole temperature of a target battery at a third moment and a first pole temperature to a difference between a pole temperature of a target battery at a fourth moment and a second pole temperature as a third difference value.

[0164] In a possible implementation, the third difference value may satisfy the following formula 6:

[0165]

[0166] Where, ΔT j is the third difference value of the target battery. 1,j is the pole temperature of the target battery at the third moment. 2,j is the electrode temperature of the target battery at the fourth moment. is the first pole temperature. is the second pole temperature.

[0167] S1003: The lagging battery determination device determines whether the third difference value is greater than or equal to a third preset threshold.

[0168] If the third difference value is less than the third preset threshold, the lagging battery determination device does not mark the battery and ends the process.

[0169] If the third difference value is greater than or equal to the third preset threshold, the lagging battery determination apparatus executes S1004.

[0170] S1004: The lagging battery determination device determines that the target battery is a battery in the third battery bank.

[0171] Optionally, the batteries in the third battery bank may also be dynamically refreshed. The implementation process of the lagging battery determination device dynamically refreshing the batteries in the third battery bank can be referred to the implementation process of the lagging battery determination device dynamically refreshing the batteries in the third battery bank, which will not be repeated here.

[0172] The above technical solution brings at least the following beneficial effects: the backward battery determination method provided by the present application, the backward battery determination device can determine that the average value of the pole temperature of multiple batteries at the third moment is the first pole temperature, and determine that the average value of the pole temperature of multiple batteries at the fourth moment is the second pole temperature. Then, the backward battery determination device determines that the difference between the pole temperature of the target battery at the third moment and the first pole temperature, and the ratio of the difference between the pole temperature of the target battery at the fourth moment and the second pole temperature is the third difference value of the target battery, and when the third difference value is greater than or equal to the third preset threshold, the target battery is determined to be a battery in the third battery library, so that the backward battery determination device of the present application determines the batteries in the third battery library based on the pole temperatures of multiple batteries at the first moment, not the batteries in the third battery library determined based on the pole temperature of the battery at one moment, thereby improving the accuracy of determining the third battery library.

[0173] Optional, above Figure 2 , Figure 4 , Figure 5 , Figures 7 to 10 The method shown can be applied to a scenario where, within a target time period, multiple batteries are in both a charging state (eg, a floating charging state, an equalizing charging state) and a discharging state.

[0174] It is understandable that the above-mentioned backward battery determination method can be implemented by a backward battery determination device. In order to realize the above-mentioned functions, the backward battery determination device includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the modules and algorithm steps of each example described in the embodiments disclosed herein, the embodiments disclosed in the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the embodiments disclosed in this application.

[0175] The embodiments disclosed in the present application can divide the functional modules of the lagging battery determination device generated by the above method example. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiments disclosed in the present application is schematic and is only a logical functional division. There may be other division methods in actual implementation.

[0176] Fig.11 FIG. 1 is a schematic diagram of a structure of a device for determining a lagging battery provided by an embodiment of the present invention. Fig.11 As shown, the lagging battery determination device 110 can be used to perform Figure 2 , Figure 4 , Figure 5 , Figures 7 to 10 The method for determining a lagging battery is shown. The device 110 for determining a lagging battery includes: a communication unit 1101 and a processing unit 1102 .

[0177] The communication unit 1101 is used to obtain battery information of multiple batteries in a target time period; the battery information includes: internal resistance, voltage, and pole temperature; the processing unit 1102 is used to determine the first battery library, the second battery library, and the third battery library according to the battery information of the multiple batteries in the target time period; the first battery library includes batteries whose internal resistance abnormality times are greater than or equal to a first preset threshold in the target time period; the second battery library includes batteries whose voltage abnormality times are greater than or equal to a second preset threshold in the target time period; the third battery library includes batteries whose pole temperature differs from the average pole temperature of multiple batteries by a degree greater than or equal to a third preset threshold; the processing unit 1102 is also used to determine that the batteries included in the first battery library, the second battery library, and the third battery library are lagging batteries.

[0178] In a possible implementation, the target time period includes: multiple first moments, multiple second moments, a third moment, and a fourth moment; the battery information includes: internal resistance at multiple first moments, voltage at multiple second moments, pole temperature at the third moment, and pole temperature at the fourth moment; the first moment is the moment when the battery is in a charging state; the second moment is the moment when the battery is in a discharging state; the third moment is the moment when the battery starts discharging; and the fourth moment is the moment when the battery ends discharging.

[0179] In one possible implementation, the processing unit 1102 is further used to perform the following operations on the internal resistance of multiple batteries at each first moment to obtain batteries with abnormal internal resistance at each first moment; determine the average value of the internal resistance of multiple batteries at the target first moment as the target average internal resistance; the target first moment is any first moment among the multiple first moments; determine the batteries with abnormal internal resistance at the target first moment based on the internal resistance of multiple batteries at the target first moment and the target average internal resistance; the processing unit 1102 is further used to determine the number of times each battery is marked as a battery with abnormal internal resistance based on the batteries with abnormal internal resistance at each first moment; when the number of times marked as a battery with abnormal internal resistance is greater than or equal to a first preset threshold, the processing unit 1102 is further used to determine that the battery is a battery in the first battery library.

[0180] In one possible implementation, the processing unit 1102 is also used to perform the following operations on the internal resistance of each battery at the target first moment: determining a battery with abnormal internal resistance at the target first moment; determining the difference between the internal resistance of the target battery at the target first moment and the target average internal resistance, and the ratio of the internal resistance to the target average internal resistance is the first difference value of the target battery at the target first moment; the target battery is any one of the multiple batteries; when the first difference value is greater than or equal to a fourth preset threshold, marking the target battery as a battery with abnormal internal resistance.

[0181] In one possible implementation, the processing unit 1102 is further used to determine that the sum of the voltages of multiple batteries at a preset second moment is a first voltage; the preset second moment is the moment with the earliest time order among the multiple second moments; the processing unit 1102 is further used to determine the voltage-abnormal battery at each second moment according to the voltages of the multiple batteries at each second moment among the multiple second moments and the first voltage; the processing unit 1102 is further used to determine the number of times each battery is marked as a voltage-abnormal battery based on the voltage-abnormal battery at each second moment; when the number of times marked as a voltage-abnormal battery is greater than or equal to a second preset threshold, the processing unit 1102 is further used to determine that the battery is a battery in the second battery library.

[0182] In one possible implementation, the processing unit 1102 is also used to perform the following operations on the voltages of multiple batteries at each second moment to obtain a battery with abnormal voltage at each second moment; determine that the difference between the voltages of multiple batteries at the target second moment and the voltages of multiple batteries at the preset second moment is the voltage drop of the multiple batteries at the target second moment; the target second moment is any second moment among the multiple second moments; determine that the sum of the voltage drops of the multiple batteries, and the difference with the first voltage is the second voltage; the processing unit 1102 is also used to perform the following operations on the voltage of each battery at the target second moment to determine a battery with abnormal voltage at the target second moment; determine the difference between the voltage drop of the target battery and the second voltage, and the ratio of the voltage drop to the second voltage is the second difference value of the target battery; when the second difference value is greater than or equal to the fifth preset threshold, mark the target battery as a battery with abnormal voltage.

[0183] In one possible implementation, when the second difference value is greater than or equal to the fifth preset threshold, the processing unit 1102 is further used to determine a target second difference value of the target battery; the target second difference value is the second difference value of the target battery at the last sampling moment; the last sampling moment is the second moment with the latest time order among multiple second moments; when the target second difference value is greater than or equal to the sixth preset threshold, the processing unit 1102 is further used to mark the target battery as a battery with abnormal voltage.

[0184] In one possible implementation, the processing unit 1102 is further used to determine that the average value of the pole temperatures of multiple batteries at a third moment is the first pole temperature, and to determine that the average value of the pole temperatures of multiple batteries at a fourth moment is the second pole temperature; the processing unit 1102 is further used to determine that the difference between the pole temperature of the target battery at the third moment and the first pole temperature, and the ratio of the difference between the pole temperature of the target battery at the fourth moment and the second pole temperature is the third difference value of the target battery; when the third difference value is greater than or equal to the third preset threshold, the processing unit 1102 is further used to determine that the target battery is a battery in a third battery library.

[0185] Through the description of the above implementation methods, technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device and unit described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0186] Among them, the computer readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer readable storage media (a non-exhaustive list) include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a register, a hard disk, an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above, or any other form of computer readable storage medium known in the art. An exemplary storage medium is coupled to a processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and the storage medium can be located in an application-specific integrated circuit (ASIC). In the embodiments of the present application, a computer-readable storage medium may be any tangible medium that contains or stores a program, which may be used by or in conjunction with an instruction execution system, apparatus, or device.

[0187] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for determining a lagging battery, characterized in that: include: Obtain battery information of multiple batteries in a target time period; The battery information includes: internal resistance, voltage, and pole temperature; According to the battery information of the multiple batteries in the target time period, a first battery library, a second battery library, and a third battery library are determined; the first battery library includes batteries whose number of internal resistance abnormalities is greater than or equal to a first preset threshold value in the target time period; the second battery library includes batteries whose number of voltage abnormalities is greater than or equal to a second preset threshold value in the target time period; the third battery library includes batteries whose difference between the pole temperature of the battery and the average pole temperature of the multiple batteries is greater than or equal to a third preset threshold value; It is determined that the batteries included in the first battery bank, the second battery bank, and the third battery bank are lagging batteries.

2. The method according to claim 1, characterized in that The target time period includes: multiple first moments, multiple second moments, a third moment, and a fourth moment; the battery information includes: internal resistance at the multiple first moments, voltage at the multiple second moments, pole temperature at the third moment, and pole temperature at the fourth moment; the first moment is the moment when the battery is in a charging state; the second moment is the moment when the battery is in a discharging state; the third moment is the moment when the battery starts discharging; and the fourth moment is the moment when the battery ends discharging.

3. The method according to claim 2, characterized in that The determining a first battery library according to battery information of the plurality of batteries in a target time period includes: Perform the following operations on the internal resistance of the plurality of batteries at each of the first moments to obtain a battery with abnormal internal resistance at each of the first moments; Determine that the average value of the internal resistance of the plurality of batteries at a target first moment is a target average internal resistance; the target first moment is any first moment among the plurality of first moments; determine the battery with abnormal internal resistance at the target first moment according to the internal resistance of the plurality of batteries at the target first moment and the target average internal resistance; Based on the battery with abnormal internal resistance at each first moment, determining the number of times each battery is marked as the battery with abnormal internal resistance; When the number of times the battery is marked as having abnormal internal resistance is greater than or equal to the first preset threshold, it is determined that the battery is a battery in the first battery bank.

4. The method according to claim 3, characterized in that The determining of the battery with abnormal internal resistance at the target first moment according to the internal resistance of the plurality of batteries at the target first moment and the target average internal resistance comprises: Performing the following operations on the internal resistance of each battery at the target first moment to determine the battery with abnormal internal resistance at the target first moment; Determine the difference between the internal resistance of the target battery at the target first moment and the target average internal resistance, and the ratio of the internal resistance to the target average internal resistance is the first difference value of the target battery at the target first moment; the target battery is any one of the multiple batteries; when the first difference value is greater than or equal to a fourth preset threshold, mark the target battery as the battery with abnormal internal resistance.

5. The method according to claim 2, characterized in that: The determining the second battery library according to the battery information of the plurality of batteries in the target time period includes: Determine that the sum of the voltages of the plurality of batteries at a preset second moment is the first voltage; the preset second moment is the moment with the earliest time order among the plurality of second moments; determining a battery with abnormal voltage at each second moment according to the voltages of the plurality of batteries at each second moment among the plurality of second moments and the first voltage; Based on the abnormal voltage battery at each second moment, determining the number of times each battery is marked as the abnormal voltage battery; When the number of times the battery is marked as having abnormal voltage is greater than or equal to the second preset threshold, it is determined that the battery is a battery in the second battery bank.

6. The method according to claim 5, characterized in that The step of determining a battery with abnormal voltage at each second moment according to the voltages of the plurality of batteries at each second moment among the plurality of second moments and the first voltage comprises: Perform the following operation on the voltages of the plurality of batteries at each of the second moments to obtain the battery with abnormal voltage at each of the second moments; Determine that the difference between the voltages of the multiple batteries at the target second moment and the voltages of the multiple batteries at the preset second moment is the voltage drop of the multiple batteries at the target second moment; the target second moment is any second moment among the multiple second moments; determine that the difference between the sum of the voltage drops of the multiple batteries and the first voltage is the second voltage; Performing the following operation on the voltage of each battery at the target second moment to determine the battery with abnormal voltage at the target second moment; Determine the difference between the voltage drop of the target battery and the second voltage, and the ratio of the voltage drop to the second voltage is the second difference value of the target battery; when the second difference value is greater than or equal to a fifth preset threshold, mark the target battery as the voltage abnormality battery.

7. The method according to claim 6, characterized in that When the second difference value is greater than or equal to a fifth preset threshold, marking the target battery as the battery with abnormal voltage includes: When the second difference value is greater than or equal to the fifth preset threshold, determining a target second difference value of the target battery; the target second difference value is the second difference value of the target battery at the last sampling moment; the last sampling moment is the second moment with the latest time order among the multiple second moments; When the target second difference value is greater than or equal to a sixth preset threshold, the target battery is marked as the battery with abnormal voltage.

8. The method according to claim 2, characterized in that: The determining a third battery bank according to the battery information of the plurality of batteries in the target time period includes: Determine that an average value of the pole temperatures of the plurality of batteries at the third moment is a first pole temperature, and determine that an average value of the pole temperatures of the plurality of batteries at the fourth moment is a second pole temperature; Determine a ratio of a difference between a pole temperature of the target battery at the third moment and the first pole temperature to a difference between a pole temperature of the target battery at the fourth moment and the second pole temperature as a third difference value of the target battery; When the third difference value is greater than or equal to the third preset threshold, the target battery is determined to be a battery in the third battery bank.

9. A device for determining a lagging battery, characterized in that: The device comprises: a communication unit and a processing unit; The communication unit is used to obtain battery information of multiple batteries in a target time period; the battery information includes: internal resistance, voltage, and pole temperature; The processing unit is used to determine a first battery library, a second battery library, and a third battery library according to battery information of the multiple batteries in a target time period; the first battery library includes batteries whose number of internal resistance abnormalities is greater than or equal to a first preset threshold value in the target time period; the second battery library includes batteries whose number of voltage abnormalities is greater than or equal to a second preset threshold value in the target time period; the third battery library includes batteries whose difference between the pole temperature of the battery and the average pole temperature of the multiple batteries is greater than or equal to a third preset threshold value; The processing unit is further used to determine that the batteries included in the first battery library, the second battery library, and the third battery library are backward batteries.

10. The device according to claim 9, characterized in that The target time period includes: multiple first moments, multiple second moments, a third moment, and a fourth moment; the battery information includes: internal resistance at the multiple first moments, voltage at the multiple second moments, pole temperature at the third moment, and pole temperature at the fourth moment; the first moment is the moment when the battery is in a charging state; the second moment is the moment when the battery is in a discharging state; the third moment is the moment when the battery starts discharging; and the fourth moment is the moment when the battery ends discharging.

11. The device according to claim 10, characterized in that The processing unit is further configured to perform the following operations on the internal resistance of the plurality of batteries at each of the first moments to obtain a battery with abnormal internal resistance at each of the first moments; Determine that the average value of the internal resistance of the plurality of batteries at a target first moment is a target average internal resistance; the target first moment is any first moment among the plurality of first moments; determine the battery with abnormal internal resistance at the target first moment according to the internal resistance of the plurality of batteries at the target first moment and the target average internal resistance; The processing unit is further used to determine the number of times each battery is marked as the battery with abnormal internal resistance based on the battery with abnormal internal resistance at each first moment; In a case where the number of times the battery is marked as having abnormal internal resistance is greater than or equal to the first preset threshold, the processing unit is further configured to determine that the battery is a battery in the first battery library.

12. The device according to claim 11, characterized in that The processing unit is further configured to perform the following operations on the internal resistance of each battery at the target first moment to determine the battery with abnormal internal resistance at the target first moment; Determine a difference between the internal resistance of the target battery at the target first moment and the target average internal resistance, and a ratio of the difference to the target average internal resistance is a first difference value of the target battery at the target first moment; The target battery is any one of the multiple batteries; When the first difference value is greater than or equal to a fourth preset threshold, the target battery is marked as the battery with abnormal internal resistance.

13. The device according to claim 10, characterized in that The processing unit is further used to determine that the sum of the voltages of the plurality of batteries at a preset second moment is the first voltage; the preset second moment is the moment with the earliest time order among the plurality of second moments; The processing unit is further used to determine a battery with abnormal voltage at each second moment according to the voltages of the plurality of batteries at each second moment among the plurality of second moments and the first voltage; The processing unit is further configured to determine the number of times each battery is marked as the battery with abnormal voltage based on the battery with abnormal voltage at each second moment; In a case where the number of times the battery is marked as having abnormal voltage is greater than or equal to the second preset threshold, the processing unit is further configured to determine that the battery is a battery in the second battery bank.

14. The device according to claim 13, characterized in that The processing unit is further configured to perform the following operation on the voltages of the plurality of batteries at each second moment to obtain a battery with abnormal voltage at each second moment; Determine that a difference between the voltages of the plurality of batteries at the target second moment and the voltages of the plurality of batteries at the preset second moment is a voltage drop of the plurality of batteries at the target second moment; The target second moment is any second moment among the plurality of second moments; determining the sum of the voltage drops of the plurality of batteries, and the difference between the sum and the first voltage is a second voltage; The processing unit is further used to perform the following operation on the voltage of each battery at the target second moment to determine the battery with abnormal voltage at the target second moment; Determine a difference between a voltage drop of a target battery and the second voltage, wherein a ratio of the voltage drop to the second voltage is a second difference value of the target battery; When the second difference value is greater than or equal to a fifth preset threshold, the target battery is marked as the battery with abnormal voltage.

15. The device according to claim 14, characterized in that When the second difference value is greater than or equal to the fifth preset threshold, the processing unit is further configured to determine a target second difference value of the target battery; the target second difference value is the second difference value of the target battery at the last sampling moment; the last sampling moment is the second moment with the latest time order among the multiple second moments; When the target second difference value is greater than or equal to a sixth preset threshold, the processing unit is further configured to mark the target battery as the battery with abnormal voltage.

16. The device according to claim 10, characterized in that The processing unit is further used to determine that an average value of the pole temperatures of the plurality of batteries at the third moment is a first pole temperature, and to determine that an average value of the pole temperatures of the plurality of batteries at the fourth moment is a second pole temperature; The processing unit is further used to determine that the ratio of the difference between the pole temperature of the target battery at the third moment and the first pole temperature to the difference between the pole temperature of the target battery at the fourth moment and the second pole temperature is a third difference value of the target battery; When the third difference value is greater than or equal to the third preset threshold, the processing unit is further configured to determine that the target battery is a battery in the third battery bank.

17. A device for determining a lagging battery, characterized in that: include: A processor and a communication interface; the communication interface is coupled to the processor, and the processor is used to run a computer program or instruction to implement the backward battery determination method as described in any one of claims 1-8.

18. A computer-readable storage medium, wherein instructions are stored in the computer-readable storage medium, characterized in that: When a computer executes the instruction, the computer executes the lagging battery determination method described in any one of claims 1 to 8.

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