Early warning methods, devices, equipment, and media for battery integrity

Abstract

In the conventional battery management technology, it is difficult to detect an abnormality in the integrity of the battery cells at an early stage, and there is a possibility that a sign of performance deterioration or failure due to deterioration of the integrity may be missed. As a result, there is a problem that the reliability of the entire battery is lowered, and the safety and the service life are also adversely affected.SOLUTION: The present application provides an early warning method and apparatus for battery integrity, a device and a medium, and relates to the field of battery technology. Specifically, the charging and discharging amount of each cell in the cell group of the battery is acquired, and the equalization consumption and the equalization operation rate of each cell are acquired. Then, the equalization loss rate of the cell is calculated according to the charging / discharging amount and the equalization consumption electricity amount of the cell, and when the loss rate exceeds a first threshold or the equalization operation rate exceeds a second threshold, it is determined that the integrity of the cell is abnormal, and early warning information is generated. As a result, the operator can quickly grasp and deal with the abnormality, and the failure rate of the battery can be reduced.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] This application relates to the field of battery technology, and particularly to an early warning method, device, equipment and medium for battery consistency.

Background Art

[0002] Battery consistency means the similarity of each cell in important parameters in a battery system, and these parameters usually include voltage, capacity, internal resistance, temperature and state (such as charge state and discharge state). The consistency of the battery is very important for the performance, life and safety of the battery system.

[0003] Note that a battery module includes a plurality of cells, and a battery cluster includes a plurality of battery modules.

[0004] However, during the use of the battery, when the consistency of the cells in the battery is abnormal, the operator cannot immediately know and process it, which causes battery failure.

Summary of the Invention

Problems to be Solved by the Invention

[0005] The embodiments of this application provide an early warning method, device, equipment and medium for battery consistency in order to solve the problem that in the prior art, when the consistency of the cells in the battery is abnormal, the operator cannot immediately know and process it, which causes battery failure.

Means for Solving the Problems

[0006] In a first aspect, the embodiments of this application include: Steps of obtaining the charge and discharge amount of each cell in a cell group of a battery, and obtaining the equalization consumption power of each said cell, and obtaining the equalization operation rate of each said cell; Steps of obtaining the equalization loss rate of the cell based on the charge and discharge amount of the cell and the equalization consumption power of the cell; The present invention provides an early warning method for battery integrity, which includes the steps of determining that the integrity of a cell is abnormal and generating early warning information for the cell if the equalization loss rate of the cell is greater than a first preset threshold or the equalization operation rate of the cell is greater than a second preset threshold.

[0007] In the second embodiment, the embodiment of the present application is as follows: A first acquisition module for acquiring the charge / discharge amount of each cell in a group of battery cells, acquiring the equalized power consumption amount of each cell, and acquiring the equalization operation rate of each cell, A second acquisition module for obtaining the equalization loss rate of the cell based on the charge / discharge amount of the cell and the equalization electricity consumption amount of the cell, The present invention provides an early warning device for battery integrity, which includes an early warning module for determining that the integrity of a cell is abnormal and for generating early warning information for the cell if the equalization loss rate of the cell is greater than a first preset threshold or the equalization operation rate of the cell is greater than a second preset threshold.

[0008] In a third embodiment, the embodiment of the present application further provides an electronic device that includes a processor, memory, and a program or command stored in the memory and executable by the processor, wherein when the program or command is executed by the processor, steps of the method of the first embodiment are realized.

[0009] In a fourth embodiment, the embodiment of the present application further provides a readable storage medium which stores a program or command that, when executed by a processor, implements a step of the method described in the first embodiment. [Effects of the Invention]

[0010] In the embodiment of the present invention, first, the charge and discharge amount of each cell in the battery cell group is obtained, the equalization power consumption amount of each cell is obtained, and the equalization operation rate of each cell is obtained. Subsequently, the equalization loss rate of the cell is obtained based on the charge and discharge amount of the cell and the equalization power consumption amount of the cell. Furthermore, if the equalization loss rate of the cell is greater than a first preset threshold, or the equalization operation rate of the cell is greater than a second preset threshold, it is determined that the cell integrity is abnormal, and early alarm information for the cell is generated, so that the operator can immediately know and take action, and further reduce the battery failure rate.

[0011] The above is merely an overview of the technical solution of this application. In order to provide a clearer understanding of the technical means of this application, to enable implementation based on the contents of the specification, and to make the above and other objectives, features, and advantages of this application clearer and easier to understand, specific embodiments of this application are listed below. [Brief explanation of the drawing]

[0012] To more clearly explain the technical solutions in the embodiments of the present invention, the necessary drawings used in describing the embodiments are briefly introduced below. As will be clear, the drawings in the following description are merely some embodiments of the present invention, and those skilled in the art can obtain further drawings based on these without any creative effort. [Figure 1] This is a flowchart of the steps of the early warning method for battery integrity provided in an embodiment of the present invention. [Figure 2] This is a flowchart of the steps of another battery integrity early warning method provided in an embodiment of the present invention. [Figure 3] This is a block diagram of the battery integrity early warning device provided in the embodiment of the present invention. [Figure 4] This is a schematic diagram of the hardware structure of the electronic device provided in the embodiment of the present application. [Modes for carrying out the invention]

[0013] In the following, referring to the drawings in the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. As is clear, the described embodiments are some of the embodiments of the present application, not all of them. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present application.

[0014] The terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects and are not for explaining a specific order or sequence. The data used in this way can be exchanged when appropriate, and the embodiments of the present application provide convenience for implementation in an order other than that illustrated or described herein. And the objects distinguished by "first", "second", etc. generally belong to the same type and do not limit the number of objects. For example, the first object may be one or more. And in the description and claims, "and / or" represents at least one of the connected objects, and the character " / " generally represents that the related objects before and after are in an "or" relationship.

[0015] In the following, referring to the drawings, the early warning method for battery consistency provided by the embodiments of the present application will be described in detail according to specific embodiments and their application scenarios.

[0016] FIG. 1 is a flowchart of the steps of the early warning method for battery consistency provided by the embodiments of the present application. As shown in FIG. 1, the method may include the following.

[0017] In step 101, obtain the charge and discharge amount of each cell in the cell group of the battery, and obtain the equalization consumption power of each said cell, and obtain the equalization operation rate of each said cell.

[0018] Note that the cell group of the battery includes a plurality of cells. For example, the cell group of the battery may be a battery module or a battery cluster.

[0019] The charge-discharge amount of the cell is the sum of the charge amount of the cell and the discharge amount of the cell. Here, the charge amount of the cell is the sum of the single charge amounts each time the cell is charged, and the discharge amount of the cell is the single discharge amount each time the cell is discharged. The equalization power consumption of the cell is the sum of the single power consumptions of each equalization operation of the cell. The equalization operation rate of the cell is the ratio of the number of equalization operations of the cell to the number of charge-discharge cycles of the cell. Here, the number of charge-discharge cycles of the cell is the sum of the number of charge cycles and the number of discharge cycles of the cell.

[0020] In some embodiments, each battery module has an equalization module. The equalization module is used to perform an equalization operation on the cells in the battery module. The battery management system (BMS) of the battery collects the collected data such as the voltage, current, temperature, etc. of each cell in the battery, and controls the operation of the equalization module based on the collected data. Here, the types of equalization operations include active equalization and passive equalization. The equalization operation of active equalization realizes energy equalization between cells by means of energy (electrical energy) transfer. For example, the energy of a high-energy cell is transferred to a low-energy cell. The equalization operation of passive equalization realizes energy equalization between cells by means of consuming energy. For example, through parallel resistors and switch control, the energy in a cell with a relatively high voltage is consumed by the resistor, thereby reducing the voltage of the cell.

[0021] The battery management system of the battery collects battery data, including the type of equalization operation, the cell number, the charge-discharge amount of the cell, etc.

[0022] In some embodiments, the formula for the equalization power consumption of the cell is shown below. JPEG0007850849000001.jpg22132 Here, L is the equalization power consumption of the cell, m is the number of equalization operations of the cell (i.e., the number of activations of the equalization module for the cell), ΔI i is the single power consumption of the i-th equalization operation of the cell, and i is a positive integer not exceeding m.

[0023] The formula for the charge and discharge rate of the cell is shown below: JPEG0007850849000002.jpg30154 Here, E is the charge / discharge rate of the cell, n is the sum of the number of charge and discharge cycles of the cell, and Δe k k is the charge amount of the cell at its kth charge or the discharge amount of the cell at its kth discharge, where k is a positive integer less than or equal to n.

[0024] In the embodiment of the present invention, the charge and discharge amount of each cell in the cell group of the battery is obtained, the equalization power consumption amount of each cell is obtained, and the equalization operation rate of each cell is obtained. Furthermore, based on the charge and discharge amount of the cell and the equalization power consumption amount of the cell, the equalization loss rate of the cell is obtained, and then it is determined whether or not the consistency of the cell is abnormal based on the equalization loss rate of the cell and the equalization operation rate of the cell.

[0025] In step 102, the equalization loss rate of the cell is obtained based on the charge and discharge amount of the cell and the equalization electricity consumption of the cell.

[0026] Specifically, the cell equalization loss rate is the ratio of the cell's equalization electricity consumption to the cell's charge / discharge rate.

[0027] In some examples, the formula for the cell equalization loss rate is shown below: JPEG0007850849000003.jpg28154 Here, α is the equalization loss rate of the cell, L is the equalization electricity consumption of the cell, and E is the charge / discharge amount of the cell.

[0028] In the embodiment of the present invention, the equalization loss rate of the cell is obtained based on the charge / discharge amount of the cell and the equalization electricity consumption of the cell, and it is determined whether or not the cell consistency is abnormal based on the equalization loss rate of the cell.

[0029] In step 103, if the equalization loss rate of the cell is greater than a first preset threshold, or the equalization operation rate of the cell is greater than a second preset threshold, it is determined that the consistency of the cell is abnormal, and early warning information for the cell is generated.

[0030] Furthermore, if the cell equalization loss rate is below a first preset threshold and the cell equalization operation rate is below a second preset threshold, it is indicated that the cell consistency is normal.

[0031] In the embodiment of the present invention, if the cell equalization loss rate is greater than a first preset threshold, or the cell equalization operation rate is greater than a second preset threshold, it is determined that the cell integrity is abnormal, and early alarm information for the cell is generated, so that the operator can immediately become aware of and take action, further reducing the battery failure rate.

[0032] Specifically, a predetermined cycle is set, and at each predetermined cycle, the charge / discharge amount of each cell in the battery cell group within the predetermined cycle is obtained, the equalization power consumption amount of each cell within the predetermined cycle is obtained, and the equalization operation rate of each cell within the predetermined cycle is obtained. Furthermore, based on the charge / discharge amount and the equalization power consumption amount of each cell within the predetermined cycle, the equalization loss rate of each cell within the predetermined cycle is obtained. In this way, the consistency of the cell is judged once at each predetermined cycle, and if the equalization loss rate of each cell within the predetermined cycle is greater than a first predetermined threshold, or if the equalization operation rate of each cell within the predetermined cycle is greater than a second predetermined threshold, it is determined that the cell consistency is abnormal, and early warning information for the cell is generated.

[0033] As described above, in the embodiment of the present invention, first, the charge and discharge amount of each cell in the battery cell group is obtained, the equalization power consumption amount of each cell is obtained, and the equalization operation rate of each cell is obtained. Subsequently, the equalization loss rate of the cell is obtained based on the charge and discharge amount of the cell and the equalization power consumption amount of the cell. Furthermore, if the equalization loss rate of the cell is greater than a first preset threshold, or the equalization operation rate of the cell is greater than a second preset threshold, it is determined that the cell integrity is abnormal, and early alarm information for the cell is generated, so that the operator can immediately know and take action, and further reduce the battery failure rate.

[0034] Figure 2 is a flowchart of the specific steps of the early warning method for battery integrity provided in an embodiment of the present invention, and as shown in Figure 2, the method may include the following:

[0035] In step 201, the charge and discharge amounts of each cell in the battery cell group are obtained, and the equalized power consumption amount of each cell is obtained.

[0036] The implementation of this step is similar to the implementation process of step 101 above, and therefore its explanation is omitted here.

[0037] Selectively, in some embodiments, the step of obtaining the charge / discharge amount of each cell in a group of battery cells includes the following substeps.

[0038] In substep 2011, the amount of a single charge that the cell charges each time is obtained, and the amount of a single discharge that the cell discharges each time is obtained.

[0039] The amount of charge in a single charge of a cell is the difference in the amount of electricity obtained by subtracting the amount of electricity at the start of a single charge from the amount of electricity at the end of the single charge of the cell.

[0040] The amount of discharge in a single cell discharge is the difference in electrical charge obtained by subtracting the amount of electrical charge at the start of the single cell discharge from the amount of electrical charge at the end of the single cell discharge.

[0041] In the embodiment of the present invention, the amount of charge and discharge of the cell is obtained by acquiring the amount of charge the cell receives each time it is charged and the amount of discharge the cell receives each time it is discharged, and then adding the amounts of charge and discharge of each cell together.

[0042] In substep 2012, the charge and discharge amounts of each cell are added together to obtain the charge and discharge amounts of the cell.

[0043] In the embodiment of the present invention, the charge and discharge amounts of the cell are obtained by adding the charge and discharge amounts of each cell, and the equalization loss rate of the cell is obtained based on the charge and discharge amounts of the cell and the equalization electricity consumption of the cell.

[0044] By executing substeps 2011 and 2012, it is possible to obtain the charge and discharge amounts of the cell.

[0045] Selectively, in some embodiments, the step of obtaining the equalized electricity consumption of each of the cells includes the following substeps:

[0046] In substep 2013, the single-cycle electricity consumption for each equalization operation of the cell is obtained.

[0047] In the embodiment of the present invention, the amount of electricity consumed for each equalization operation of the cell is obtained, and the amount of electricity consumed for each equalization operation of the cell is then added to obtain the total amount of electricity consumed for equalization.

[0048] Selectively, in some embodiments, substep 2013 may include the following branched substeps.

[0049] In the branched substep 2013a, if the type of cell equalization operation is passive equalization, the first electric quantity of the cell is acquired at the start time of the cell equalization operation, and the second electric quantity of the cell is acquired at the end time of the cell equalization operation.

[0050] In the embodiment of the present invention, when the type of cell equalization operation is passive equalization, a first electrical quantity of the cell is obtained at the start time of the cell equalization operation, and a second electrical quantity of the cell is obtained at the end time of the cell equalization operation. Furthermore, the absolute value of the difference between the first electrical quantity and the second electrical quantity is taken as the single electrical quantity consumed by the cell equalization operation.

[0051] In the branched substep 2013b, the absolute value of the difference between the first amount of electricity and the second amount of electricity is taken as the single amount of electricity consumed for the cell equalization operation.

[0052] In the embodiment of the present invention, the absolute value of the difference between the first and second electrical quantities is taken as the single-cycle electricity consumption for the cell equalization operation, and the total electricity consumption for cell equalization is obtained by adding the single-cycle electricity consumption for each cell equalization operation.

[0053] In some examples, the formula for the single-cycle electricity consumption of the cell equalization operation is shown below: JPEG0007850849000004.jpg28170

[0054] By performing branched substep 2013b from branched substep 2013a, it is possible to obtain the single-cycle electricity consumption of a cell equalization operation when the type of cell equalization operation is passive equalization.

[0055] Selectively, in some embodiments, substep 2013 further includes the following branched substeps.

[0056] In the branched substep 2013c, if the type of equalization operation for the cell is active equalization, the third charge of the cell and the fourth charge of the other cells are obtained at the start time of the equalization operation for the cell, and the fifth charge of the cell and the sixth charge of the other cells are obtained at the end time of the equalization operation for the cell.

[0057] In the embodiment of the present application, when the type of cell equalization operation is active equalization, the third charge of the cell and the fourth charge of the other cells are obtained at the start time of the cell equalization operation, and the fifth charge of the cell and the sixth charge of the other cells are obtained at the end time of the cell equalization operation, and further, the fifth charge is subtracted from the third charge to obtain the third difference, and the fourth charge is subtracted from the sixth charge to obtain the fourth difference.

[0058] In the branched substep 2013d, the third difference is obtained by subtracting the fifth electric quantity from the third electric quantity, and the fourth difference is obtained by subtracting the fourth electric quantity from the sixth electric quantity.

[0059] In the embodiment of the present invention, the third difference is obtained by subtracting the fifth electric quantity from the third electric quantity, the fourth difference is obtained by subtracting the fourth electric quantity from the sixth electric quantity, the fifth difference is obtained by subtracting the fourth difference from the third difference, and the value obtained by dividing the fifth difference by 2 is taken as the single electric consumption amount for the cell equalization operation.

[0060] In the branched substep 2013e, the fourth difference is subtracted from the third difference to obtain the fifth difference, and the value obtained by dividing the fifth difference by 2 is taken as the single-cycle electricity consumption for the cell equalization operation. Here, the other cells have lower electrical energy than the first cell, and the cell equalization operation causes the electrical energy of the first cell to flow to the other cells.

[0061] Furthermore, in a single active equalization operation, if the energy of one cell is higher than the energy of other cells, the active equalization operation transfers energy from the high-energy cell to the other low-energy cells. The single electricity consumption for the equalization operation of the other low-energy cells is obtained by dividing the fifth difference by 2, and is equal to the single electricity consumption for the equalization operation of the high-energy cell.

[0062] In the embodiment of the present invention, the fifth difference is obtained by subtracting the fourth difference from the third difference, and the value obtained by dividing the fifth difference by 2 is taken as the single-cycle electricity consumption for the cell equalization operation. Furthermore, the single-cycle electricity consumption for each cell equalization operation is added to obtain the total electricity consumption for cell equalization.

[0063] In some examples, the formula for the third difference in the i-th equalization operation is shown below. JPEG0007850849000005.jpg15139 Here, Δd i d0 is the third difference of the i-th equalization operation (i.e., the change in the amount of electricity in the cell that discharges during the equalization operation), d0 is the third amount of electricity of the i-th equalization operation, and d1 is the fifth amount of electricity of the i-th equalization operation.

[0064] The formula for the fourth difference in the i-th equalization operation is shown below: JPEG0007850849000006.jpg15130 Here, ΔC i c0 is the fourth difference of the i-th equalization operation (i.e., the change in the amount of charge of the other cells being charged in the equalization operation), c1 is the sixth amount of charge of the i-th equalization operation, and c0 is the fourth amount of charge of the i-th equalization operation.

[0065] The fifth difference in the i-th equalization operation is Δd i -Δc i The formula for the single electricity consumption of the i-th equalization operation of a cell is shown below. JPEG0007850849000007.jpg45170

[0066] By performing branched substep 2013e from branched substep 2013c, it is possible to obtain the single-cycle electricity consumption of a cell equalization operation when the type of cell equalization operation is active equalization.

[0067] In substep 2014, the single-cycle electricity consumption for each equalization operation of the cell is added up to obtain the total electricity consumption for equalization.

[0068] In the embodiment of the present invention, the amount of electricity consumed during each equalization operation of the cell is added up to obtain the amount of electricity consumed during the equalization operation of the cell, and further, the equalization loss rate of the cell is obtained based on the amount of charge and discharge of the cell and the amount of electricity consumed during the equalization operation of the cell.

[0069] By executing substeps 2013 and 2014, it is possible to obtain the equalized electricity consumption of the cell.

[0070] In step 202, the equalization loss rate of the cell is obtained based on the charge and discharge amount of the cell and the equalization electricity consumption of the cell.

[0071] The implementation of this step is similar to the implementation process of step 102 above, and therefore its explanation is omitted here.

[0072] In step 203, the number of operations for equalizing the cells is obtained.

[0073] In the embodiment of the present invention, the number of operations for the cell equalization operation is obtained, and then the number of charge-discharge operations for the cell is obtained. After that, the number of operations is divided by the number of charge-discharge operations to obtain the cell equalization operation rate.

[0074] In step 204, the number of charge cycles and discharge cycles of the cell are obtained, and the number of charge cycles and the number of discharge cycles are added together to obtain the total number of charge-discharge cycles of the cell.

[0075] In the embodiment of the present invention, the number of charge cycles and discharge cycles of the cell are obtained, and the number of charge cycles and discharge cycles are added together to obtain the number of charge / discharge cycles of the cell. Furthermore, the number of operations is divided by the number of charge / discharge cycles to obtain the equalization operation rate of the cell.

[0076] In step 205, the number of operations is divided by the number of charge-discharge cycles to obtain the equalization operation rate of the cell.

[0077] In the embodiment of the present invention, the cell equalization operation rate is obtained by dividing the number of operations by the number of charge-discharge cycles, and it is determined whether or not the cell consistency is abnormal based on the cell equalization operation rate.

[0078] In step 206, if the equalization loss rate of the cell is greater than a first preset threshold, or the equalization operation rate of the cell is greater than a second preset threshold, it is determined that the consistency of the cell is abnormal, and early warning information for the cell is generated.

[0079] The implementation of this step is similar to the implementation process of step 103 above, and therefore its explanation is omitted here.

[0080] Selectively, in some embodiments, the method further includes the following steps:

[0081] In step 207, the first average value of the equalization loss rate of the cells in the cell group is obtained.

[0082] In the embodiment of the present invention, by obtaining the first average value of the equalization loss rate of cells in a group of cells, the product of the first average value and a predetermined coefficient is determined as the first predetermined threshold.

[0083] Specifically, in some examples, the formula for the first mean value of the equalization loss rate of cells in a group of cells is shown below: JPEG0007850849000008.jpg36170

[0084] In step 208, the product of the first mean value and a predetermined coefficient is determined as the first predetermined threshold.

[0085] In the embodiment of the present invention, the product of a first average value and a preset coefficient is determined as a first preset threshold, and further, the consistency of the cells is determined by comparing the equalization loss rate of the cells with the first preset threshold.

[0086] By executing steps 207 to 208, it is possible to obtain the first pre-set threshold.

[0087] Selectively, in some embodiments, the method further includes the following steps:

[0088] In step 209, the target cell in the cell group is determined using a pre-configured policy.

[0089] In the embodiment of the present invention, a target cell in a group of cells is determined by using a pre-configured policy, and the first difference between the target equalization loss rate of the target cell and the first mean value is obtained.

[0090] Selectively, in some embodiments, step 209 may include the following substeps.

[0091] In substep 2091, the cells in the cell group are sorted in ascending order of the equalization loss rate, and the order of each cell in the cell group is obtained.

[0092] In the embodiment of the present invention, the order of each cell in the cell group is obtained by sorting the cells in the cell group in order of increasing equalization loss rate, and further, the first cell in the cell group whose order is greater than a preset order threshold is obtained.

[0093] In substep 2092, a first cell is obtained from the cell group whose order is greater than a preset order threshold.

[0094] In the embodiment of the present invention, by acquiring a first cell in the cell group whose order is greater than a preset order threshold, the first cell with the smallest equalization loss rate among the first cells is further determined as the target cell.

[0095] In substep 2093, the first cell with the smallest equalization loss rate among the first cells is determined to be the target cell.

[0096] In the embodiment of the present invention, the first cell with the smallest equalization loss rate among the first cells is determined as the target cell, and the first difference between the target equalization loss rate of the target cell and the first average value is obtained.

[0097] For example, a group of cells includes three cells, namely cell A1 (where the equalization loss rate of cell A1 is equalization loss rate B1), cell A2 (where the equalization loss rate of cell A2 is equalization loss rate B2), and cell A3 (where the equalization loss rate of cell A3 is equalization loss rate B3). Here, equalization loss rate B1 is smaller than equalization loss rate B2, and equalization loss rate B2 is smaller than equalization loss rate B3. So, if we sort the cells in the group of cells in ascending order of equalization loss rate, the sorted cells are, in order, cell A1, cell A2, and cell A3. The order of cell A1 is order C1, the order of cell A2 is order C2, and the order of cell A2 is order C2. Here, order C1 is smaller than order C2, order C2 is smaller than order C3, order C1 is smaller than a preset order threshold, order C2 is larger than a preset order threshold, and order C3 is larger than a preset order threshold.

[0098] Since order C2 is greater than the preset order threshold and order C3 is greater than the preset order threshold, cells A2 and A3 are both the first cell, and since the equalization loss rate B2 is less than the equalization loss rate B3, in the first cell (cells A2 and A3), cell A2 is determined to be the target cell.

[0099] By executing substeps 2091 through 2093, it is possible to obtain the target cell.

[0100] Selectively, in some embodiments, step 209 may include the following substeps.

[0101] In substep 2094, a pre-configured outlier detection algorithm is used to detect the equalization loss rate of the cells in the cell group, and a second cell with an abnormal equalization loss rate in the cell group is acquired.

[0102] Specifically, the pre-configured outlier detection algorithm is used to detect outliers or anomalies. The pre-configured outlier detection algorithm may be a cluster-based outlier detection method, and may be one of the following: the BIRCH (Balanced Iterative Reducing and Clustering using Hierarchies) algorithm and the DBSCAN (Density-Based Spatial Clustering of Applications with Noise) algorithm.

[0103] In the embodiment of the present invention, the equalization loss rate of cells in a cell group is detected by using a pre-set outlier detection algorithm, a second cell with an abnormal equalization loss rate in the cell group is acquired, and the second cell with the smallest equalization loss rate among the second cells is determined as the target cell.

[0104] In substep 2095, the second cell with the smallest equalization loss rate among the second cells is determined to be the target cell.

[0105] In the embodiment of the present invention, the second cell with the smallest equalization loss rate among the second cells is determined as the target cell, and the first difference between the target equalization loss rate of the target cell and the first mean value is obtained.

[0106] By executing substeps 2094 and 2095, it is possible to obtain the target cell.

[0107] In step 210, the first difference between the target equalization loss rate of the target cell and the first mean value is obtained.

[0108] In the embodiment of the present invention, a first difference is obtained between the target equalization loss rate of the target cell and the first mean value, and then the first difference is divided by the first mean value to obtain a preset coefficient.

[0109] In step 211, the first difference is divided by the first mean value to obtain the preset coefficient.

[0110] In the embodiment of the present invention, a predetermined coefficient is obtained by dividing the first difference by the first mean value, and the product of the first mean value and the predetermined coefficient is determined as the first predetermined threshold value.

[0111] By performing steps 209 through 211, it is possible to obtain pre-set coefficients.

[0112] Selectively, in some embodiments, the method further includes the following steps:

[0113] In step 212, the amount of reduction is obtained based on a preset reduction rate and the usage time of the cell group.

[0114] In the embodiment of the present invention, a reduction amount is obtained based on a preset reduction rate and the usage time of the cell group, and a second difference is obtained by subtracting the reduction amount from a preset initial sequence threshold.

[0115] In step 213, the reduction amount is subtracted from the pre-set initial order threshold to obtain the second difference.

[0116] In the embodiment of the present invention, a second difference is obtained by subtracting a reduction amount from a preset initial order threshold, and if the second difference is smaller than a preset final order threshold, the second difference is determined to be the preset order threshold.

[0117] In step 214, if the second difference is smaller than the preset final order threshold, the second difference is determined to be the preset order threshold.

[0118] In the embodiment of the present invention, if the second difference is smaller than a preset final order threshold, the second difference is determined as the preset order threshold, thereby obtaining a first cell in the cell group whose order is greater than the preset order threshold.

[0119] In step 215, if the second difference is greater than or equal to the final order threshold, the final order threshold is determined as the preset order threshold.

[0120] Furthermore, if the second difference is greater than or equal to the final order threshold, it indicates that the usage time of the cell group has reached the desired time.

[0121] In the embodiment of the present invention, if the second difference is greater than or equal to the final order threshold, the final order threshold is determined as a preset order threshold, thereby obtaining a first cell in the cell group whose order is greater than the preset order threshold.

[0122] By executing steps 212 to 215, it is possible to obtain a pre-set sequential threshold.

[0123] Selectively, in some embodiments, the method further includes the following steps:

[0124] In step 216, the second mean value of the cell equalization operation rate in the cell group is obtained.

[0125] In the embodiment of the present invention, by obtaining a second mean value of the cell equalization operation rate in the cell group, the product of the second mean value and a predetermined coefficient is determined as a second predetermined threshold value.

[0126] Specifically, in some examples, the formula for the second mean value of the cell equalization rate in a group of cells is shown below: JPEG0007850849000009.jpg38170 is a positive integer less than or equal to p.

[0127] In step 217, the product of the second mean value and a predetermined coefficient is determined as the second predetermined threshold.

[0128] In the embodiment of the present invention, the product of a second mean value and a predetermined coefficient is determined as a second predetermined threshold, and by comparing the cell equalization rate with the second predetermined threshold, it is determined whether or not the cell consistency is abnormal.

[0129] By performing steps 216 to 217, it is possible to obtain a second pre-set threshold.

[0130] In some embodiments, the types of early warning information include secondary early warnings and primary early warnings, each with two preset coefficients, for example, the preset coefficient corresponding to a secondary early warning is 60%, and the preset coefficient corresponding to a primary early warning is 80%, and it is possible to determine whether or not to generate early warning information for a primary early warning, as well as whether or not to generate early warning information for a secondary early warning, that is, after obtaining the target cell by executing substeps 2091 to 2093, the first difference between the target equalization loss rate of the target cell and the first mean value is obtained, and further The first difference is divided by the first mean value to obtain a preset coefficient, and then the product of the first mean value and the preset coefficient is determined as the first preset threshold, and the product of the second mean value and the preset coefficient is determined as the second preset threshold. If the cell equalization loss rate is greater than the first preset threshold, or the cell equalization operation rate is greater than the second preset threshold, it is determined that the cell consistency is abnormal, and early warning information is generated for the cell type being a secondary early warning. The early warning information for the secondary early warning and the cell number with abnormal consistency are displayed on the display screen to alert the operator to take action. After obtaining the target cell by executing substeps 2094 to 2095, the first difference between the target equalization loss rate of the target cell and the first mean value is obtained, and then the first difference is divided by the first mean value to obtain a preset coefficient. Subsequently, the product of the first mean value and the preset coefficient is determined as the first preset threshold, and the product of the second mean value and the preset coefficient is determined as the second preset threshold. If the equalization loss rate of the cell is greater than the first preset threshold, or the equalization operation rate of the cell is greater than the second preset threshold, it is determined that the cell consistency is abnormal, and the cell type is a primary early warning. The system generates a notification and displays the number of the cell with abnormal consistency along with the early warning information of the primary early warning on the display screen, alerting the operator to take action. Typically, the operator inspects the cell with abnormal consistency. The inspection method involves stopping charging and discharging the cell, allowing the cell to settle completely, measuring the cell voltage, and obtaining the difference between the cell voltage and the rated voltage. If the difference between the cell voltage and the rated voltage exceeds the standard range, an electrical replenishment operation is required. This involves connecting a power supply to the positive and negative terminals of the cell that needs inspection, calculating the charging voltage, current, etc., based on the voltage difference, and remeasuring the cell voltage after charging is complete. The difference between the cell voltage and the rated voltage must be within the standard range.

[0131] Furthermore, in each pre-set update cycle (for example, a pre-set update cycle is 1 month), the first pre-set threshold and the second pre-set threshold are updated once. For example, when acquiring a target cell by executing substeps 2091 to 2093, in each pre-set update cycle, the current decrement is obtained based on the pre-set decrement rate and the current usage time of the cell. Then, the current decrement is subtracted from the pre-set initial order threshold to obtain the current second difference. Subsequently, if the current second difference is smaller than the pre-set final order threshold, the current second difference is determined as the current pre-set order threshold. If the current second difference is greater than or equal to the final order threshold, the final order threshold is determined as the current The system determines a pre-set order threshold, then selects the first cell in the current cell group whose order is greater than the pre-set order threshold, and determines the first cell among the current first cells that has the smallest equalization loss rate as the target cell. It then obtains the first difference between the target equalization loss rate of the current target cell and the first mean value, divides the current first difference by the current first mean value to obtain the current pre-set coefficient, and then determines the product of the current first mean value and the current pre-set coefficient as the current first pre-set threshold, and determines the product of the current second mean value and the current pre-set coefficient as the current second pre-set threshold, thereby updating the first and second pre-set thresholds.

[0132] In related technologies, determining whether a cell is abnormal relies solely on basic data such as voltage, current, and temperature. Early warnings, based primarily on the detection of voltage, current, and temperature anomalies, are incomplete and inaccurate in their evaluation of cell integrity, resulting in low accuracy and timeliness of early warnings, and preventing operators from immediately detecting and addressing potential battery failures.

[0133] The embodiment of this invention utilizes data information such as the number of equalization operations performed by the equalization module, the type of equalization operation, the charge / discharge amount of the cells, and the amount of electricity consumed by the cells during equalization to determine whether or not the cell integrity is abnormal, thereby enabling a more comprehensive evaluation of the cell integrity, improving the accuracy of the cell integrity evaluation, further improving the accuracy and immediacy of early warnings, allowing operators to immediately detect and address potential battery failures, prompting operators to perform inspections and maintenance immediately, ensuring high efficiency and safe operation of the battery system, and extending the battery's service life.

[0134] Specifically, the embodiment of the present invention can immediately detect inter-cell consistency problems based on data information such as the number of equalization operations of the equalization module, the type of equalization operation, the charge / discharge amount of the cells, and the amount of electricity consumed by the cells during equalization, thereby ensuring the uniformity of the entire cell group and improving the performance and service life of the cell group. Furthermore, the embodiment of the present invention can identify potential cell failure risks in advance, issue early warning notifications to operators, and avoid serious problems caused by cell failures. In addition, by providing early warnings to operators, the embodiment of the present invention can enable operators to perform maintenance and inspections immediately, delaying the aging process of the battery, extending the service life of the battery, reducing replacement costs, improving the overall reliability of the battery system, and reducing downtime and maintenance costs due to battery problems. Moreover, the embodiment of the present invention can provide more detailed early warning information and inspection advice, helping operators create scientific maintenance plans and improving operational and maintenance efficiency.

[0135] As described above, in the embodiment of the present invention, first, the charge and discharge amount of each cell in the battery cell group is obtained, the equalization power consumption amount of each cell is obtained, and the equalization operation rate of each cell is obtained. Subsequently, the equalization loss rate of the cell is obtained based on the charge and discharge amount of the cell and the equalization power consumption amount of the cell. Furthermore, if the equalization loss rate of the cell is greater than a first preset threshold, or the equalization operation rate of the cell is greater than a second preset threshold, it is determined that the cell integrity is abnormal, and early alarm information for the cell is generated, so that the operator can immediately know and take action, and further reduce the battery failure rate.

[0136] Figure 3 is a block diagram of an early warning device for battery integrity provided in an embodiment of the present invention, and as shown in Figure 3, the device 300 is A first acquisition module 301 for acquiring the charge / discharge amount of each cell in a group of battery cells, acquiring the equalized power consumption amount of each cell, and acquiring the equalization operation rate of each cell, A second acquisition module 302 for obtaining the equalization loss rate of the cell based on the charge / discharge amount of the cell and the equalization electricity consumption amount of the cell, The system includes an early warning module 303 for determining that the consistency of a cell is abnormal and for generating early warning information for the cell if the equalization loss rate of the cell is greater than a first preset threshold or the equalization operation rate of the cell is greater than a second preset threshold.

[0137] Selectively, the device 300 is, A third acquisition module for obtaining the first average value of the equalization loss rate of the cells in the aforementioned cell group, The system further includes a first determination module for determining the product of the first average value and a preset coefficient as the first preset threshold.

[0138] Selectively, the device 300 is, A second decision module for determining the target cell in the cell group using a pre-configured policy, A fourth acquisition module for obtaining the first difference between the target equalization loss rate of the target cell and the first mean value, The system further includes a fifth acquisition module for obtaining the preset coefficient by dividing the first difference by the first mean value.

[0139] Selectively, the second decision module is, specifically, A first acquisition submodule for sorting the cells in the cell group in ascending order of equalization loss rate and obtaining the order of each cell in the cell group, A second acquisition submodule for acquiring a first cell in the aforementioned group of cells whose order is greater than a preset order threshold, The system includes a first determination submodule for determining the first cell having the smallest equalization loss rate among the first cells as the target cell.

[0140] Selectively, the device 300 is, A sixth acquisition module for acquiring the amount of reduction based on a pre-set reduction rate and the usage time of the cell group, A seventh acquisition module for obtaining a second difference by subtracting the reduction amount from a pre-set initial order threshold, If the second difference is smaller than a preset final order threshold, a third decision module for determining the second difference as the preset order threshold is provided. The system further includes a fourth determination module for determining the final order threshold as the preset order threshold if the second difference is greater than or equal to the final order threshold.

[0141] Selectively, the second decision module is, specifically, A third acquisition submodule for detecting the equalization loss rate of cells in the cell group using a pre-configured outlier detection algorithm, and for acquiring a second cell in the cell group whose equalization loss rate is abnormal, The system includes a second determination submodule for determining the second cell having the smallest equalization loss rate among the second cells as the target cell.

[0142] Selectively, the device 300 is, An eighth acquisition module for obtaining the second mean value of the cell equalization operation rate in the aforementioned cell group, The system further includes a fifth decision module for determining the product of the second mean value and a preset coefficient as the second preset threshold.

[0143] Selectively, the first acquisition module 301 is, specifically, A fourth acquisition submodule for acquiring the single charge amount that the cell charges each time and the single discharge amount that the cell discharges each time, The system includes a fifth acquisition submodule for obtaining the charge / discharge amount of the cells by adding the single charge amount and single discharge amount of each of the cells.

[0144] Selectively, the first acquisition module 301 is, specifically, A sixth acquisition submodule for acquiring the single-cycle electricity consumption for each equalization operation of the aforementioned cell, The system includes a seventh acquisition submodule for obtaining the equalization electricity consumption by adding the single-cycle electricity consumption for each equalization operation of the cell.

[0145] Selectively, the sixth acquisition submodule is, specifically, If the type of equalization operation of the cell is passive equalization, a first acquisition unit for acquiring a first electric quantity of the cell at the start time of the equalization operation of the cell, and for acquiring a second electric quantity of the cell at the end time of the equalization operation of the cell, The system includes a second acquisition unit for determining the absolute value of the difference between the first and second electrical quantities as the single-cycle electrical consumption for the equalization operation of the cell.

[0146] Selectively, the sixth acquisition submodule is, specifically, If the type of equalization operation of the cell is active equalization, a third acquisition unit for acquiring the third charge of the cell and the fourth charge of the other cells at the start time of the equalization operation of the cell, and for acquiring the fifth charge of the cell and the sixth charge of the other cells at the end time of the equalization operation of the cell, A fourth acquisition unit for obtaining the third difference by subtracting the fifth electric quantity from the third electric quantity, and for obtaining the fourth difference by subtracting the fourth electric quantity from the sixth electric quantity, A fifth acquisition unit for obtaining a fifth difference by subtracting the fourth difference from the third difference, and for obtaining a value by dividing the fifth difference by 2, which is used as the single-cycle electricity consumption for the equalization operation of the cell, Here, the other cells have lower electrical energy than the first cell, and the cell equalization operation causes the electrical energy of the first cell to flow to the other cells.

[0147] Selectively, the first acquisition module 301 is, specifically, An eighth acquisition submodule for obtaining the number of operations for equalizing the cells, A ninth acquisition submodule for obtaining the number of charge cycles and discharge cycles of the cell, and for adding the number of charge cycles and the number of discharge cycles to obtain the number of charge / discharge cycles of the cell, The system includes a 10th acquisition submodule for obtaining the equalization operation rate of the cell by dividing the number of operations by the number of charge-discharge cycles.

[0148] The battery integrity early warning device in the embodiments of the present application may be a device, a component in a terminal, an integrated circuit, or a chip. The device may be a portable electronic device or a non-portable electronic device. For example, portable electronic devices may be mobile phones, tablet computers, notebook computers, palmtop computers, in-vehicle electronic devices, wearable devices, ultra-mobile personal computers (UMPCs), netbooks, or personal digital assistants (PDAs), while non-portable electronic devices may be servers, network-attached storage (NAS), personal computers (PCs), televisions (TVs), ATMs, or self-service machines, and the embodiments of the present application are not specifically limited.

[0149] The battery integrity early warning device in the embodiments of the present application may be a device having an operating system. The operating system may be an Android operating system, an iOS operating system, or any other possible operating system, and the embodiments of the present application are not specifically limited.

[0150] The battery integrity early warning device provided in the embodiment of the present invention can implement each of the processes realized by the battery integrity early warning device in the embodiment of the method shown in Figure 1, and to avoid duplication, the explanation is omitted here.

[0151] In the embodiment of the present invention, first, the charge and discharge amount of each cell in the battery cell group is obtained, the equalization power consumption amount of each cell is obtained, and the equalization operation rate of each cell is obtained. Subsequently, the equalization loss rate of the cell is obtained based on the charge and discharge amount of the cell and the equalization power consumption amount of the cell. Furthermore, if the equalization loss rate of the cell is greater than a first preset threshold, or the equalization operation rate of the cell is greater than a second preset threshold, it is determined that the cell integrity is abnormal, and early alarm information for the cell is generated, so that the operator can immediately know and take action, and further reduce the battery failure rate.

[0152] Optionally, embodiments of the present application further provide electronic equipment including a processor, memory, and a program or command stored in the memory and operable on the processor, which can realize each step of the embodiment of the battery integrity early warning method when the program or command is executed on the processor, and achieve similar technical effects, which are omitted here to avoid duplication.

[0153] Furthermore, the electronic devices in the embodiments of this application include the portable electronic devices and non-portable electronic devices described above.

[0154] Figure 4 is a schematic diagram of the hardware structure of an electronic device that realizes an embodiment of the present invention.

[0155] The electronic device 400 includes, but is not limited to, components such as a radio frequency unit 401, a network module 402, an audio output unit 403, an input unit 404, a sensor 405, a display unit 406, a user input unit 407, an interface unit 408, a memory 409, and a processor 410.

[0156] As those skilled in the art will understand, the electronic device 400 may further include a power supply (e.g., a battery) to power each component, and the power supply may be logically connected to the processor 410 by a power management system, thereby enabling the power management system to manage functions such as charging, discharging, and power consumption management. The structure of the electronic device shown in Figure 4 is not limiting to the electronic device, and the electronic device may include more or fewer components than shown, or may be a combination of several components, or different arrangements of components, which are omitted from this explanation.

[0157] Here, the processor 410 obtains the charge / discharge amount of each cell in the battery cell group, obtains the equalization power consumption amount of each cell, and obtains the equalization operation rate of each cell. Based on the charge / discharge amount of the cell and the equalization electricity consumption of the cell, the equalization loss rate of the cell is obtained. If the equalization loss rate of the cell is greater than a first preset threshold, or the equalization operation rate of the cell is greater than a second preset threshold, it is determined that the consistency of the cell is abnormal, and this is used to generate early warning information for the cell.

[0158] In the embodiment of the present invention, first, the charge and discharge amount of each cell in the battery cell group is obtained, the equalization power consumption amount of each cell is obtained, and the equalization operation rate of each cell is obtained. Subsequently, the equalization loss rate of the cell is obtained based on the charge and discharge amount of the cell and the equalization power consumption amount of the cell. Furthermore, if the equalization loss rate of the cell is greater than a first preset threshold, or the equalization operation rate of the cell is greater than a second preset threshold, it is determined that the cell integrity is abnormal, and early alarm information for the cell is generated, so that the operator can immediately know and take action, and further reduce the battery failure rate.

[0159] Selectively, the processor 410 further obtains a first average value of the equalization loss rate of the cells in the cell group, and uses the product of the first average value and a preset coefficient to determine the first preset threshold.

[0160] Selectively, the processor 410 is used to determine a target cell in the cell group using a pre-configured policy, to obtain a first difference between the target equalization loss rate of the target cell and the first mean value, to divide the first difference by the first mean value and to obtain the pre-configured coefficient.

[0161] Selectively, the processor 410 further sorts the cells in the cell group in ascending order of equalization loss rate, obtains the order of each cell in the cell group, obtains a first cell in the cell group whose order is greater than a preset order threshold, and uses the first cell with the smallest equalization loss rate among the first cells to determine it as the target cell.

[0162] Selectively, the processor 410 further obtains a reduction amount based on a preset reduction rate and the usage time of the cell group, subtracts the reduction amount from a preset initial order threshold to obtain a second difference, and if the second difference is smaller than a preset final order threshold, the processor 410 determines the second difference as the preset order threshold, and if the second difference is greater than or equal to the final order threshold, the processor 410 uses the final order threshold to determine the preset order threshold.

[0163] Selectively, the processor 410 further uses a pre-configured outlier detection algorithm to detect the equalization loss rate of the cells in the cell group, acquire a second cell in the cell group with an abnormal equalization loss rate, and uses the second cell with the smallest equalization loss rate among the second cells to determine it as the target cell.

[0164] Selectively, the processor 410 further obtains a second mean value of the cell equalization operation rate in the cell group, and uses the product of the second mean value and a preset coefficient to determine the second preset threshold value.

[0165] Selectively, the processor 410 is used to obtain the single charge amount that the cell charges each time and the single discharge amount that the cell discharges each time, and to add each of the single charge amounts and each of the single discharge amounts of the cell to obtain the charge / discharge amount of the cell.

[0166] Selectively, the processor 410 is used to obtain the single-cycle electricity consumption for each equalization operation of the cell, add the single-cycle electricity consumption for each equalization operation of the cell, and obtain the equalization electricity consumption.

[0167] Selectively, if the type of cell equalization operation is passive equalization, the processor 410 further acquires a first electrical quantity of the cell at the start time of the cell equalization operation and a second electrical quantity of the cell at the end time of the cell equalization operation, and uses the absolute value of the difference between the first electrical quantity and the second electrical quantity as the single electrical consumption of the cell equalization operation.

[0168] Optionally, if the type of cell equalization operation is active equalization, the processor 410 may further obtain the third charge of the cell and the fourth charge of the other cell at the start time of the cell equalization operation, and the fifth charge of the cell and the sixth charge of the other cell at the end time of the cell equalization operation, subtract the fifth charge from the third charge to obtain the third difference, subtract the fourth charge from the sixth charge to obtain the fourth difference, subtract the fourth difference from the third difference to obtain the fifth difference, and divide the fifth difference by 2 to obtain the single charge consumption of the cell equalization operation, where the other cell has lower electrical energy than the cell, and the cell equalization operation transfers the electrical energy of the cell to the other cell.

[0169] Selectively, the processor 410 is used to obtain the number of operations for equalizing the cell, the number of charge and discharge operations for the cell, and to add the number of charge and discharge operations to obtain the number of charge / discharge operations for the cell, and to divide the number of operations by the number of charge / discharge operations to obtain the equalization operation rate for the cell.

[0170] In the embodiment of the present invention, first, the charge and discharge amount of each cell in the battery cell group is obtained, the equalization power consumption amount of each cell is obtained, and the equalization operation rate of each cell is obtained. Subsequently, the equalization loss rate of the cell is obtained based on the charge and discharge amount of the cell and the equalization power consumption amount of the cell. Furthermore, if the equalization loss rate of the cell is greater than a first preset threshold, or the equalization operation rate of the cell is greater than a second preset threshold, it is determined that the cell integrity is abnormal, and early alarm information for the cell is generated, so that the operator can immediately know and take action, and further reduce the battery failure rate.

[0171] It should be understood that in the embodiments of this application, the input unit 404 may include a graphics processing unit (GPU) 4041 and a microphone 4042, the graphics processor 4041 processing still or video image data acquired by an image acquisition device (e.g., a camera) in video acquisition mode or image acquisition mode. The display unit 406 may include a display panel 4061, which can be configured using a liquid crystal display, organic light-emitting diodes, or the like. The user input unit 407 includes a touch panel 4071 and at least one of other input devices 4072. The touch panel 4071 is also called a touchscreen. The touch panel 4071 may include two parts: a touch detection device and a touch controller. Other input devices 4072 include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and an operating lever, which are not described here.

[0172] Memory 409 can be used to store software programs and various data. Memory 409 may include a first storage area that mainly stores programs or commands and a second storage area that stores data, where the first storage area can store an operating system, an application program or command necessary for at least one function (e.g., audio playback function, image playback function, etc.). In addition, memory 409 may include volatile memory or non-volatile memory, or memory 409 may include both volatile memory and non-volatile memory. Here, non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically erasable programmable read-only memory (Electrically EPROM, EEPROM), or flash memory. The volatile memory may be Random Access Memory (RAM), Static Random Access Memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (Double Data Rate SDRAM, DDRSDRAM), Enhanced Synchronous Dynamic Random Access Memory (Enhanced SDRAM, ESDRAM), Synch-linked Dynamic Random Access Memory (Synch-link DRAM, SLDRAM), and Direct Memory Bus Random Access Memory (Direct Rambus RAM, DRRAM). The memory 409 in the embodiments of this application includes, but is not limited to, these and any other suitable types of memory.

[0173] The processor 410 may include one or more processing units, and optionally, the processor 410 integrates an application processor that primarily handles operations related to the operating system, user interface, and application programs, and a modem that primarily handles wireless communication signals, such as a baseband processor. As understood, the modem does not have to be integrated into the processor 410.

[0174] Embodiments of the present application provide a readable storage medium in which a program or command is stored, and when the program or command is executed by the processor, each step of the embodiment of the battery integrity early warning method described above is realized, and similar technical effects can be achieved. To avoid redundancy, a detailed explanation is omitted here.

[0175] Here, the processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes computer-readable storage media such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0176] Embodiments of the present application further provide a chip comprising a processor and a communication interface, the communication interface being coupled to the processor, the processor executing a program or command and being used to implement each step of the embodiment of the battery integrity early warning method and achieving similar technical effects, which are omitted here in order to avoid redundancy.

[0177] It should be understood that the chips referred to in the embodiments of this application may further be called system-level chips, system chips, chip systems, or on-chip system chips, etc.

[0178] In this specification, the terms “include,” “incorporate,” or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or apparatus containing a set of elements may include not only those elements but also other elements not explicitly listed, or even elements specific to such process, method, article, or apparatus. Unless further restrictions are imposed, an element limited by the phrase “includes one…” does not preclude the existence of other identical elements in a process, method, article, or apparatus containing that element. Furthermore, it should be noted that the scope of methods and apparatus in embodiments of this application is not limited to performing functions in the order illustrated or discussed, but also includes performing functions essentially simultaneously or in reverse order based on related functions, for example, a method described may be performed in an order different from the order described, and various steps may be added, omitted, or combined. Also, features described with reference to some embodiments may be combined in other examples.

[0179] As will be clearly understood by those skilled in the art from the above description of the embodiments, the methods of the above embodiments can be implemented in the form of software and a necessary general-purpose hardware platform, and of course, they may also be implemented in hardware form, but in many cases the former is a more preferred embodiment. Based on this understanding, the technical solutions of the present application can be expressed in the form of a software product, which is essentially or contributes to the prior art, and which is stored in a single storage medium (e.g., ROM / RAM, magnetic disk, optical disk) and contains a plurality of commands and is used to cause a single terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods of each embodiment of the present application.

[0180] While embodiments of the present application have been described above with reference to the drawings, the present application is not limited to the above-described specific embodiments. The above-described specific embodiments are merely illustrative and not limiting. Those skilled in the art can take many more forms, under the suggestion of the present application, without departing from the spirit and claims of the present application, all of which fall within the scope of the protection of the present application.

Claims

1. The steps include obtaining the charge / discharge amount of each cell in a group of battery cells, obtaining the equalization power consumption amount of each cell, and obtaining the equalization operation rate of each cell, The steps include obtaining the equalization loss rate of the cell based on the charge / discharge amount of the cell and the equalization electricity consumption amount of the cell, A battery consistency early warning method, characterized by comprising the steps of: determining that the consistency of the cell is abnormal and generating early warning information for the cell if the equalization loss rate of the cell is greater than a first preset threshold or the equalization operation rate of the cell is greater than a second preset threshold.

2. The aforementioned method, The steps include obtaining a first average value of the equalization loss rate of the cells in the aforementioned group of cells, The method according to claim 1, further comprising the step of determining the product of the first average value and a predetermined coefficient as the first predetermined threshold.

3. The aforementioned method, A step of determining the target cell in the group of cells using a pre-configured policy, A step of obtaining a first difference between the target equalization loss rate of the target cell and the first mean value, The method according to the 2nd, further comprising the step of dividing the first difference by the first mean value to obtain the preset coefficient.

4. The step of determining the target cell in the group of cells using a pre-configured policy is: The steps include sorting the cells in the cell group in ascending order of the equalization loss rate and obtaining the order of each cell in the cell group, The steps include: obtaining a first cell in the group of cells whose order is greater than a predetermined order threshold; The method according to claim 3, further comprising the step of determining the first cell with the smallest equalization loss rate among the first cells as the target cell.

5. The aforementioned method, A step of obtaining a reduction amount based on a pre-set reduction rate and the usage time of the cell group, A step of obtaining a second difference by subtracting the reduction amount from a pre-set initial sequence threshold, If the second difference is smaller than the predetermined final order threshold, the second difference is determined to be the predetermined order threshold. The method according to 4, further comprising the step of determining the final order threshold as the preset order threshold if the second difference is greater than or equal to the final order threshold.

6. The step of determining the target cell in the group of cells using a pre-configured policy is: The steps include: using a pre-configured outlier detection algorithm to detect the equalization loss rate of cells in the cell group, and acquiring a second cell in the cell group whose equalization loss rate is abnormal; The method according to the previous invention, comprising the step of determining the second cell with the smallest equalization loss rate among the second cells as the target cell.

7. The aforementioned method, The steps include obtaining a second mean value of the cell equalization rate in the aforementioned cell group, The method according to claim 1, further comprising the step of determining the product of the second mean value and a predetermined coefficient as the second predetermined threshold.

8. The step of obtaining the charge / discharge amount of each cell in a group of battery cells is: The steps include obtaining the single charge amount that the cell charges each time, and obtaining the single discharge amount that the cell discharges each time, The method according to claim 1, further comprising the step of adding the single charge amount and the single discharge amount of each of the cells to obtain the charge / discharge amount of the cells.

9. The step of obtaining the equalized electricity consumption of each of the aforementioned cells is: The steps include obtaining the amount of electricity consumed in a single equalization operation of the cell each time, The method according to claim 1, characterized by comprising the step of adding the single-cycle electricity consumption for each equalization operation of the cell to obtain the equalization electricity consumption.

10. The step of obtaining the single electricity consumption for each equalization operation of the cell is: If the type of equalization operation of the cell is passive equalization, the steps include: acquiring a first electric quantity of the cell at the start time of the equalization operation of the cell, and acquiring a second electric quantity of the cell at the end time of the equalization operation of the cell; The method according to 9, characterized by comprising the step of setting the absolute value of the difference between the first amount of electricity and the second amount of electricity as the amount of electricity consumed in a single equalization operation of the cell.

11. The step of obtaining the single electricity consumption for each equalization operation of the cell is: If the type of equalization operation of the cell is active equalization, the steps include: obtaining the third charge of the cell and the fourth charge of the other cells at the start time of the equalization operation of the cell, and obtaining the fifth charge of the cell and the sixth charge of the other cells at the end time of the equalization operation of the cell; The steps include subtracting the fifth electric quantity from the third electric quantity to obtain the third difference, and subtracting the fourth electric quantity from the sixth electric quantity to obtain the fourth difference, The process includes the steps of: subtracting the fourth difference from the third difference to obtain a fifth difference, and dividing the fifth difference by 2 to obtain a value which is the single-cycle electricity consumption for the equalization operation of the cell; The method according to 9, wherein the other cells have lower electrical energy than the cell, and the cell equalization operation causes the electrical energy of the cell to flow to the other cells.

12. The step of obtaining the equalization rate for each of the cells is: The steps include obtaining the number of operations for equalizing the cells, The steps include obtaining the number of charge cycles and discharge cycles of the cell, and adding the number of charge cycles and the number of discharge cycles to obtain the total number of charge-discharge cycles of the cell, The method according to claim 1, comprising the step of dividing the number of operations by the number of charge-discharge cycles to obtain the equalization operation rate of the cell.

13. A first acquisition module for acquiring the charge / discharge amount of each cell in a group of battery cells, acquiring the equalized power consumption amount of each cell, and acquiring the equalization operation rate of each cell, A second acquisition module for obtaining the equalization loss rate of the cell based on the charge / discharge amount of the cell and the equalization electricity consumption amount of the cell, An early warning device for battery integrity, comprising: an early warning module for determining that the integrity of a cell is abnormal and for generating early warning information for the cell when the equalization loss rate of the cell is greater than a first preset threshold or the equalization operation rate of the cell is greater than a second preset threshold.

14. An electronic device comprising a processor, memory, and a program or command stored in the memory and executable by the processor, wherein when the program or command is executed by the processor, the steps of the early warning method for battery integrity described in any one of claims 1 to 12 are realized.

15. A readable storage medium storing a program or command that, when executed by a processor, enables the implementation of a step of the battery integrity early warning method described in any one of claims 1 to 12.

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