Early warning method and apparatus for battery integrity, device and medium

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] The present application relates to the field of battery technology, and in particular to a method, device, apparatus and medium for early warning of battery integrity. [Background technology]

[0002] Battery consistency refers to the similarity of important parameters among cells in a battery system, which typically include voltage, capacity, internal resistance, temperature, and state (e.g., state of charge and state of discharge). Battery consistency is crucial to the performance, lifespan, and safety of the battery system.

[0003] It should be noted that a battery module includes a plurality of cells, and a battery cluster includes a plurality of battery modules.

[0004] However, when the battery is in use, if the consistency of the cells in the battery is abnormal, the operator may not be able to immediately recognize and deal with the problem, which may result in battery failure. Summary of the Invention [Problem to be solved by the invention]

[0005] The embodiments of the present application provide a method, device, equipment, and medium for early warning of battery integrity to solve the problem in the prior art that an operator cannot immediately recognize and deal with abnormal cell integrity in a battery, which may result in battery failure. [Means for solving the problem]

[0006] In a first aspect, the present embodiment comprises: Obtaining the charge / discharge amount of each cell in a cell group of a battery, obtaining the equalized consumed electricity amount of each cell, and obtaining the equalization operation rate of each cell; Obtaining a levelized loss rate of the cell based on the charge / discharge amount of the cell and the levelized electricity consumption amount of 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, determining that the integrity of the cell is abnormal, and generating early warning information for the cell.

[0007] In a second aspect, the present embodiment comprises: A first acquisition module for acquiring the charge / discharge amount of each cell in the cell group of the battery, acquiring the equalized consumed electricity amount of each of the cells, and acquiring the equalization operation rate of each of the cells; A second acquisition module for acquiring a levelized loss rate of the cell based on the charge / discharge amount of the cell and the levelized electricity consumption amount of the cell; and an early warning module for determining that the integrity of the cell is abnormal 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, and generating early warning information for the cell.

[0008] In a third aspect, an embodiment of the present application further provides an electronic device comprising a processor, a memory, and a program or command stored in the memory and executable by the processor, the program or command implementing the steps of the method of the first aspect when executed by the processor.

[0009] In a fourth aspect, an embodiment of the present application further provides a readable storage medium having stored thereon a program or commands that, when executed by a processor, implements the steps of the method according to the first aspect. [Effects of the Invention]

[0010] In the embodiment of the present application, first obtain the charge / discharge amount of each cell in a battery cell group, then obtain the equalized power consumption of each cell, and obtain the equalization operation rate of each cell. Next, obtain the cell equalization loss rate based on the cell charge / discharge amount and the cell equalization power consumption. 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 generate cell early warning information so that operators can be notified and dealt with in time, further reducing the battery failure rate.

[0011] The above is merely a summary of the technical solution of the present application. In order to make the technical solution of the present application more clearly understood, to be implemented according to the contents of the specification, and to make the above and other objectives, features and advantages of the present application more apparent, specific embodiments of the present application are listed below. [Brief explanation of the drawings]

[0012] In order to more clearly describe the technical solutions in the embodiments of the present invention, the following briefly introduces the necessary drawings used in the description of the embodiments. It is obvious that the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can further obtain other drawings based on these drawings without any creative efforts. [Figure 1] 2 is a flowchart illustrating steps of a battery integrity early warning method provided by an embodiment of the present invention. [Figure 2] 4 is a flowchart illustrating steps of another battery integrity early warning method provided by an embodiment of the present invention. [Figure 3] FIG. 1 is a block diagram of a battery integrity early warning device provided by an embodiment of the present application. [Figure 4] FIG. 1 is a schematic diagram of the hardware structure of an electronic device provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0013] The following describes the technical solutions in the embodiments of the present application clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments, and all other embodiments obtained by those skilled in the art based on the embodiments of the present application without any creative efforts are also within the scope of protection of the present application.

[0014] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish between similar objects and are not intended to describe a particular order or context. Data used in this manner may be interchanged where appropriate, and the present application may be implemented conveniently in an order other than that shown or described herein. Furthermore, objects distinguished by "first," "second," etc., are generally of the same type and do not limit the number of objects; for example, a first object may be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the related objects before and after are in an "or" relationship.

[0015] The battery integrity early warning method provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings according to specific embodiments and application scenarios.

[0016] FIG. 1 is a flowchart of the steps of a battery integrity early warning method provided in an embodiment of the present application. As shown in FIG. 1, the method can include:

[0017] In step 101, the charge / discharge amount of each cell in the cell group of the battery is obtained, the equalized consumed electricity amount of each cell is obtained, and the equalization operation rate of each cell is obtained.

[0018] It should be noted that a battery cell group includes a plurality of cells, and for example, a battery cell group may be a battery module or a battery cluster.

[0019] The charge / discharge amount of a cell is the sum of the charge amount of the cell and the discharge amount of the cell, where the charge amount of the cell is the sum of the single charge amount that the cell charges each time, the discharge amount of the cell is the single discharge amount that the cell discharges each time, the equalization consumption amount of electricity of the cell is the sum of the single consumption amount of electricity of each equalization operation of the cell, and the cell equalization operation rate is the ratio of the number of operations of the cell equalization operation to the number of times the cell is charged / discharged, where the number of times the cell is charged / discharged is the sum of the number of times the cell is charged / discharged.

[0020] In some embodiments, each battery module includes an equalization module, which is used to perform equalization operations on cells in the battery module. A battery management system (BMS) of the battery collects data such as the voltage, current, and temperature of each cell in the battery, and controls the operation of the equalization module based on the collected data. Types of equalization operations include active equalization and passive equalization. Active equalization equalization achieves energy equalization between cells by transferring energy (electrical energy), for example, transferring energy from a high-energy cell to a low-energy cell. Passive equalization equalization achieves energy equalization between cells by consuming energy, for example, by controlling a parallel resistor and switch to consume energy in a relatively high-voltage cell through resistance, thereby lowering 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, and the charge / discharge amount of the cell.

[0022] In some embodiments, the equation for the equalized electrical consumption of the cell is: JPEG2026031394000002.jpg22132Here, L is the amount of electricity consumed by the equalization of the cell, m is the number of equalization operations of the cell (i.e., the number of times the equalization module is activated for the cell), and ΔI i is the amount of electricity consumed in a single operation of the cell's i-th equalization operation, where i is a positive integer equal to or less than m.

[0023] The formula for the charge and discharge amount of the cell is shown below: JPEG2026031394000003.jpg30154Here, E is the charge / discharge amount of the cell, n is the sum of the number of times the cell has been charged and discharged, and Δe k is the charge amount of the cell in the kth charge or the discharge amount of the cell in the kth discharge, where k is a positive integer equal to or less than n.

[0024] In the embodiment of the present application, the charge / discharge amount of each cell in a battery cell group is obtained, the equalized electricity consumption amount of each cell is obtained, and the equalization operation rate of each cell is obtained. Then, the equalization loss rate of the cell is obtained based on the charge / discharge amount of the cell and the equalized electricity consumption amount of the cell, and then it is determined whether the cell consistency is abnormal based on the equalization loss rate of the cell and the equalization operation rate of the cell.

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

[0026] Specifically, the equalized loss rate of a cell is the ratio of the equalized amount of electricity consumed by the cell to the amount of charge and discharge of the cell.

[0027] In some embodiments, the formula for the levelized loss factor of a cell is: JPEG2026031394000004.jpg28154Here, α is the equalized loss rate of the cell, L is the equalized amount of electricity consumed by the cell, and E is the amount of charge and discharge of the cell.

[0028] In the embodiment of the present application, the equalized loss rate of the cell is obtained based on the charge / discharge amount of the cell and the equalized electricity consumption amount of the cell, and whether the cell consistency is abnormal is determined based on the equalized 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, determine that the integrity of the cell is abnormal, and generate early warning information for the cell.

[0030] If the equalization loss rate of the cell is equal to or less than the first preset threshold and the equalization operation rate of the cell is equal to or less than the second preset threshold, it indicates that the cell is in a normal state.

[0031] In the embodiment of the present application, 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 integrity is abnormal, and cell early warning information is generated so that operators can know and handle it immediately, and further reduce the battery failure rate.

[0032] Specifically, a predetermined period is usually set, and for each predetermined period, the charge / discharge amount of each cell in the battery cell group within the predetermined period is obtained, and the equalized consumption electricity amount of each cell within the predetermined period is obtained, and the equalization operation rate of each cell within the predetermined period is obtained. Furthermore, based on the charge / discharge amount of each cell within the predetermined period and the equalized consumption electricity amount of each cell within the predetermined period, the equalization loss rate of each cell within the predetermined period is obtained. In this way, the cell consistency is determined once per predetermined period, and if the equalization loss rate of each cell within the predetermined period is greater than the first predetermined threshold, or the equalization operation rate of each cell within the predetermined period is greater than the 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 application, first, the charge / discharge amount of each cell in a battery cell group is obtained, then the equalized power consumption of each cell is obtained, and the equalization operation rate of each cell is obtained. Next, the cell equalization loss rate is obtained based on the cell charge / discharge amount and the cell equalization power consumption. 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 consistency is abnormal, and cell early warning information is generated, so that operators can be notified and dealt with immediately, and the battery failure rate is further reduced.

[0034] FIG. 2 is a flowchart of specific steps of the battery integrity early warning method provided in the embodiment of the present application. As shown in FIG. 2, the method can include:

[0035] In step 201, the charge and discharge amount of each cell in the cell group of the battery is 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 the description thereof will be omitted here.

[0037] Optionally, in some embodiments, the step of acquiring the charge / discharge amount of each cell in the group of cells of the battery includes the following substeps:

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

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

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

[0041] In the embodiment of the present application, the single charge amount that the cell charges each time is obtained, and the single discharge amount that the cell discharges each time is obtained, and then the charge / discharge amount of the cell is obtained by adding each single charge amount and each single discharge amount of the cell.

[0042] In sub-step 2012, the single charge amount and the single discharge amount of the cell are added together to obtain the charge / discharge amount of the cell.

[0043] In the embodiment of the present application, the charge / discharge amount of the cell is obtained by adding up each single charge amount and each single discharge amount of the cell, and further, the equalized loss rate of the cell is obtained based on the charge / discharge amount of the cell and the equalized electricity consumption amount of the cell.

[0044] By executing sub-steps 2011 and 2012, the charge / discharge amount of the cell can be obtained.

[0045] Optionally, in some embodiments, the step of obtaining the levelized consumed electricity amount of each of the cells includes the following substeps:

[0046] In sub-step 2013, the amount of electricity consumed in each equalization operation of the cell is obtained.

[0047] In the embodiment of the present application, the single consumption of electricity for each equalization operation of the cells is obtained, and the single consumption of electricity for each equalization operation of the cells is further added to obtain the equalized consumption of electricity.

[0048] Optionally, in some embodiments, sub-step 2013 may include the following branched sub-steps:

[0049] In the branched sub-step 2013a, if the type of the 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.

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

[0051] In the branched sub-step 2013b, the absolute value of the difference between the first amount of electricity and the second amount of electricity is set as the amount of electricity consumed in a single operation of equalizing the cells.

[0052] In the embodiment of the present application, the absolute value of the difference between the first and second electrical quantities is taken as the electrical quantity consumed in a single cell equalization operation, and the electrical quantities consumed in each cell equalization operation are added together to obtain the equalized electrical quantity consumed by the cell.

[0053] In some embodiments, the formula for the single consumption of electricity for the cell equalization operation is as follows: JPEG2026031394000005.jpg28170

[0054] By executing the branched sub-step 2013b from the branched sub-step 2013a, if the type of cell equalization operation is passive equalization, it is possible to obtain the single-time electricity consumption amount of the cell equalization operation.

[0055] Optionally, in some embodiments, sub-step 2013 further includes the following branched sub-steps:

[0056] In the branched sub-step 2013c, if the type of the cell equalization operation is active equalization, at the start time of the cell equalization operation, the third electrical quantity of the cell and the fourth electrical quantity of the other cells are obtained, and at the end time of the cell equalization operation, the fifth electrical quantity of the cell and the sixth electrical quantity of the other cells are obtained.

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

[0058] In a branched sub-step 2013d, the fifth electric quantity is subtracted from the third electric quantity to obtain a third difference, and the fourth electric quantity is subtracted from the sixth electric quantity to obtain a fourth difference.

[0059] In the embodiment of the present application, the third difference is obtained by subtracting the fifth electric quantity from the third electric quantity, and the fourth electric quantity is subtracted from the sixth electric quantity to obtain the fourth difference, and the fourth difference is further subtracted from the third difference to obtain the fifth difference, and the value obtained by dividing the fifth difference by 2 is used as the single consumption amount of electricity in the cell equalization operation.

[0060] In a branched sub-step 2013e, the fourth difference is subtracted from the third difference to obtain a fifth difference, and the fifth difference is divided by 2 to obtain a value that is the single-time consumption amount of electricity in the equalization operation of the cells; Here, 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.

[0061] In addition, for one active equalization operation, if the energy of a cell is higher than the energy of other cells, the active equalization operation will transfer the energy of the high-energy cell to other cells with low energy, and the single-time electricity consumption of the equalization operation of the other cells with low energy is the value obtained by dividing the fifth difference by 2, which is equal to the single-time electricity consumption of the equalization operation of the high-energy cell.

[0062] In the embodiment of the present application, the fourth difference is subtracted from the third difference to obtain the fifth difference, and the fifth difference is divided by 2 to obtain the single electricity consumption of the cell equalization operation. The single electricity consumption of each cell equalization operation is then added to obtain the equalization electricity consumption of the cell.

[0063] In some embodiments, the formula for the third difference of the i-th equalization operation is: JPEG2026031394000006.jpg15139where Δd i is the third difference of the i-th equalization operation (i.e., the change in the amount of electricity in the cell that discharges in the equalization operation), d0 is the third amount of electricity in the i-th equalization operation, and d1 is the fifth amount of electricity in the i-th equalization operation.

[0064] The fourth difference formula for the i-th equalization operation is shown below: JPEG2026031394000007.jpg15130where ΔC i is the fourth difference of the i-th equalization operation (i.e., the change in the electrical quantity of the other cells being charged in the equalization operation), c1 is the sixth electrical quantity of the i-th equalization operation, and c0 is the fourth electrical quantity of the i-th equalization operation.

[0065] The fifth difference of the i-th equalization operation is Δd i -Δc i The formula for the amount of electricity consumed in the i-th equalization operation of the cell is shown below: JPEG2026031394000008.jpg45170

[0066] By executing the branched sub-step 2013e from the branched sub-step 2013c, if the type of cell equalization operation is active equalization, it is possible to obtain the single-time electricity consumption amount of the cell equalization operation.

[0067] In sub-step 2014, the single consumption of electricity in each equalization operation of the cell is added to obtain the equalized consumption of electricity.

[0068] In the embodiment of the present application, the cell's equalized electricity consumption is obtained by adding up the single electricity consumption of each cell equalization operation, and the cell's equalized loss rate is further obtained based on the cell's charge / discharge amount and the cell's equalized electricity consumption.

[0069] By executing sub-step 2013 and sub-step 2014, the equalized consumed electricity amount of the cell can be obtained.

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

[0071] The implementation of this step is similar to the implementation process of step 102 above, and the description thereof will be omitted here.

[0072] In step 203, the number of equalization operations for the cell is obtained.

[0073] In the embodiment of the present application, the number of cell equalization operations is obtained, and the number of cell charge / discharge operations is then obtained, and the number of operations is then divided by the number of charge / discharge operations to obtain the cell equalization operation rate.

[0074] In step 204, the number of times the cell has been charged and discharged is obtained, and the number of times the cell has been charged and discharged is added together to obtain the number of times the cell has been charged and discharged.

[0075] In the embodiment of the present application, the number of times a cell is charged and discharged is obtained, and the number of times the cell is charged and discharged is added together to obtain the number of times the cell is charged and discharged. The number of operations is then divided by the number of times the cell is charged and discharged to obtain the equalization operation rate of the cell.

[0076] In step 205, the number of operations is divided by the number of charging and discharging operations to obtain the equalization operation rate of the cell.

[0077] In the embodiment of the present application, the cell equalization operation rate is obtained by dividing the number of operations by the number of charge / discharge operations, and whether the cell consistency is abnormal is determined 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, determine that the integrity of the cell is abnormal, and generate early warning information for the cell.

[0079] The implementation of this step is similar to the implementation process of step 103 above, and the description thereof will be omitted here.

[0080] Optionally, in some embodiments, the method further comprises the following steps:

[0081] In step 207, a first average value of the levelized loss ratios of the cells in the group of cells is obtained.

[0082] In an embodiment of the present application, by obtaining a first average value of the equalized loss ratios of the cells in the cell group, the product of the first average value and a preset coefficient is further determined as the first preset threshold value.

[0083] Specifically, in some embodiments, the formula for the first average levelized loss factor of the cells in the group of cells is: JPEG2026031394000009.jpg36170

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

[0085] In an embodiment of the present application, the product of the first average value and a preset coefficient is determined as a first preset threshold, and the equalized loss rate of the cell is further compared with the first preset threshold to determine whether the cell consistency is abnormal.

[0086] By executing steps 207 and 208, the first preset threshold value can be obtained.

[0087] Optionally, in some embodiments, the method further comprises the following steps:

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

[0089] In an embodiment of the present application, a target cell in a group of cells is determined by using a preset policy, and a first difference between the target levelized loss ratio of the target cell and a first average value is obtained.

[0090] Optionally, in some embodiments, step 209 may include the following substeps:

[0091] In sub-step 2091, the cells in the cell group are sorted in ascending order of the equalized loss ratio to obtain the order of each of the cells in the cell group.

[0092] In an embodiment of the present application, the order of each cell in the cell group is obtained by sorting the cells in the cell group in ascending order of equalized loss ratio, and then the first cell in the cell group whose order is greater than a preset order threshold is obtained.

[0093] In sub-step 2092, the first cell in the group of cells whose order is greater than a preset order threshold is obtained.

[0094] In an embodiment of the present application, by obtaining a first cell in a cell group whose order is greater than a preset order threshold, the first cell among the first cells whose equalized loss ratio is the smallest is determined as a target cell.

[0095] In sub-step 2093, the first cell having the smallest equalized loss ratio among the first cells is determined as the target cell.

[0096] In an embodiment of the present application, the first cell having the smallest equalized loss ratio among the first cells is determined as the target cell, and a first difference between the target equalized loss ratio of the target cell and the first average value is further obtained.

[0097] For example, a cell group includes three cells, namely, cell A1 (the levelized loss rate of cell A1 is levelized loss rate B1), cell A2 (the levelized loss rate of cell A2 is levelized loss rate B2), and cell A3 (the levelized loss rate of cell A3 is levelized loss rate B3), where the levelized loss rate B1 is smaller than the levelized loss rate B2, and the levelized loss rate B2 is smaller than the levelized loss rate B3. Then, the cells in the cell group are sorted in ascending order of levelized loss rate, and the sorted cells are, in order, cell A1, cell A2, and cell A3, where 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, where 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, then cell A2 and cell A3 are both first cells, and since equalized loss rate B2 is smaller than equalized loss rate B3, then in the first cells (cell A2, cell A3), cell A2 is determined as the target cell.

[0099] By executing sub-steps 2091 to 2093, the target cell can be obtained.

[0100] Optionally, in some embodiments, step 209 may include the following substeps:

[0101] In sub-step 2094, a preset outlier detection algorithm is used to detect the levelized loss ratios of the cells in the cell group, and a second cell in the cell group whose levelized loss ratio is abnormal is obtained.

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

[0103] In an embodiment of the present application, a preset outlier detection algorithm is used to detect the equalized loss ratios of cells in a cell group, and a second cell in the cell group whose equalized loss ratio is abnormal is obtained. Furthermore, among the second cells, the second cell with the smallest equalized loss ratio is determined as the target cell.

[0104] In sub-step 2095, the second cell having the smallest equalized loss ratio among the second cells is determined as the target cell.

[0105] In an embodiment of the present application, the second cell having the smallest equalized loss ratio among the second cells is determined as the target cell, and a first difference between the target equalized loss ratio of the target cell and the first average value is further obtained.

[0106] By performing sub-step 2094 to sub-step 2095, the target cell can be obtained.

[0107] In step 210, a first difference between the target levelized loss ratio of the target cell and the first average value is obtained.

[0108] In the embodiment of the present application, by obtaining a first difference between the target levelized loss ratio of the target cell and the first average value, the first difference is further divided by the first average value to obtain a preset coefficient.

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

[0110] In the embodiment of the present application, the first difference is divided by the first average value to obtain a preset coefficient, and the product of the first average value and the preset coefficient is determined as the first preset threshold.

[0111] By executing steps 209 to 211, it is possible to obtain the preset coefficients.

[0112] Optionally, in some embodiments, the method further comprises the following steps:

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

[0114] In the embodiment of the present application, a decay amount is obtained based on a preset decay rate and the use time of the cell group, and then the decay amount is subtracted from a preset initial sequence threshold to obtain a second difference.

[0115] In step 213, the step-down amount is subtracted from a preset initial sequence threshold to obtain a second difference.

[0116] In the embodiment of the present application, a second difference is obtained by subtracting the gradual decrease amount from the preset initial order threshold, and if the second difference is smaller than the preset final order threshold, the second difference is determined as the preset order threshold.

[0117] In step 214, if the second difference is less than the preset final order threshold, the second difference is determined as the preset order threshold.

[0118] In an embodiment of the present application, if the second difference is smaller than the preset final order threshold, the second difference is determined as the preset order threshold, thereby further 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] If the second difference is equal to or greater than the final order threshold, it indicates that the usage time of the cell group has reached the desired time.

[0121] In an embodiment of the present application, 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 further obtaining a first cell in the cell group whose order is greater than the preset order threshold.

[0122] By performing steps 212 to 215, a preset sequence threshold can be obtained.

[0123] Optionally, in some embodiments, the method further comprises the following steps:

[0124] In step 216, a second average value of the equalization operation rates of the cells in the group of cells is obtained.

[0125] In the embodiment of the present application, by obtaining a second average value of the equalization operation rates of the cells in the cell group, the product of the second average value and a preset coefficient is further determined as the second preset threshold value.

[0126] Specifically, in some embodiments, the formula for the second average value of the equalization operation rate of the cells in the group of cells is as follows: JPEG2026031394000010.jpg38170 is a positive integer less than or equal to p.

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

[0128] In the embodiment of the present application, the product of the second average value and a preset coefficient is determined as the second preset threshold, and the equalization operation rate of the cell is compared with the second preset threshold to determine whether the consistency of the cell is abnormal.

[0129] By executing steps 216 to 217, the second preset threshold can be obtained.

[0130] In some embodiments, the types of early warning information include secondary early warning and primary early warning, and two preset coefficients are set respectively, for example, the preset coefficient corresponding to the secondary early warning is 60%, and the preset coefficient corresponding to the primary early warning is 80%, and it can determine whether to generate early warning information of the primary early warning and whether to generate early warning information of the secondary early warning, that is, after obtaining the target cell by performing sub-steps 2091 to 2093, obtain a first difference between the target equalized loss ratio of the target cell and the first average value, and Divide the first difference by a first average value to obtain a preset coefficient, then determine the product of the first average value and the preset coefficient as a first preset threshold, and determine the product of the second average value and the preset coefficient as a 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, determine that the cell consistency is abnormal, and generate early warning information whose cell type is a second early warning, and display the early warning information of the second early warning and the number of the cell whose consistency is abnormal on the display screen to remind the operator to take action; After obtaining the target cell by performing sub-step 2094 to sub-step 2095, obtain a first difference between the target equalization loss rate of the target cell and a first average value, and further divide the first difference by the first average value to obtain a preset coefficient. Then, determine the product of the first average value and the preset coefficient as a first preset threshold, and determine the product of the second average value and the preset coefficient as a 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, determine the integrity of the cell is abnormal, and obtain early warning information of which the cell type is primary early warning. The display screen will display the early warning information of the primary early warning and the number of the cell with abnormal consistency, thereby alerting the operator to take action. Usually, the operator will inspect the cell with abnormal consistency. The inspection method is to stop charging and discharging the cell, let the cell stand for a sufficient time, measure the cell voltage, and obtain 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 needs to be performed, that is, connect a power source to the positive and negative poles of the cell that needs to be inspected, and calculate the set charging voltage, current, etc. based on the voltage difference. After charging is completed, the cell voltage is measured again, and the difference between the cell voltage and the rated voltage is within the standard range.

[0131] In addition, in each preset update period (for example, the preset update period is one month), the first preset threshold and the second preset threshold are updated once. For example, when a target cell is obtained by performing sub-steps 2091 to 2093, in each preset update period, a current decay amount is obtained based on the preset decay rate and the current use time of the cell, and then the current decay amount is subtracted from the preset initial order threshold to obtain a current second difference. Then, if the current second difference is smaller than the preset final order threshold, the current second difference is determined as the current preset order threshold. If the current second difference is greater than or equal to the final order threshold, the final order threshold is set as the current The first cell in the current cell group is determined as the predetermined order threshold, and then a first cell in the current cell group whose order is greater than the predetermined order threshold is obtained, and the first cell among the current first cells whose equalized loss rate is the smallest is determined as the target cell, and a first difference between the target equalized loss rate of the current target cell and the first average value is obtained, and the current first difference is divided by the current first average value to obtain a current predetermined coefficient, and then the product of the current first average value and the current predetermined coefficient is determined as the current first predetermined threshold, and the product of the current second average value and the current predetermined coefficient is determined as the current second predetermined threshold, thereby realizing the update of the first predetermined threshold and the second predetermined threshold.

[0132] In related art, whether a cell is in an abnormal state is determined solely by relying on basic data such as voltage, current, and temperature, and early warnings are mainly based on detecting abnormalities in voltage, current, and temperature, resulting in an incomplete and inaccurate assessment of cell integrity and low accuracy and low timeliness of early warnings, which causes operators to be unable to promptly detect and deal with potential battery failures.

[0133] The embodiments of the present application use 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 to determine whether the cell integrity is abnormal, making the cell integrity assessment more comprehensive and improving the accuracy of the cell integrity assessment, and further improving the accuracy and timeliness of early warnings, allowing operators to immediately detect and handle potential battery failures and remind operators to perform inspection and maintenance immediately, ensuring high efficiency and safe operation of the battery system and extending the service life of the batteries.

[0134] Specifically, the embodiments of the present application can detect compatibility issues between cells in real time 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 after equalization, ensuring the uniformity of the entire cell group and thereby improving the performance and service life of the cell group. The embodiments of the present application can also identify potential cell failure risks in advance and provide early warning notices to operators, thereby avoiding serious problems caused by cell failure. In addition, the embodiments of the present application can provide early warnings to operators, allowing them to perform maintenance and inspection in real time, delaying the battery aging process, extending the battery service life, reducing replacement costs, improving the overall reliability of the battery system, and reducing downtime and maintenance costs caused by battery problems. The embodiments of the present application can also provide more detailed early warning information and inspection advice, helping operators formulate scientific maintenance plans and improving operation and maintenance efficiency.

[0135] As described above, in the embodiment of the present application, first, the charge / discharge amount of each cell in a battery cell group is obtained, then the equalized power consumption of each cell is obtained, and the equalization operation rate of each cell is obtained. Next, the cell equalization loss rate is obtained based on the cell charge / discharge amount and the cell equalization power consumption. 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 consistency is abnormal, and cell early warning information is generated, so that operators can be notified and dealt with immediately, and the battery failure rate is further reduced.

[0136] FIG. 3 is a block diagram of a battery integrity early warning device provided by an embodiment of the present application. As shown in FIG. 3, the device 300 includes: A first acquisition module 301 for acquiring the charge / discharge amount of each cell in a cell group of a battery, acquiring the equalized consumed electricity amount of each cell, and acquiring the equalization operation rate of each cell; A second obtaining module 302 for obtaining a levelized loss rate of the cell according to the charge / discharge amount of the cell and the levelized electricity consumption amount of the cell; and an early warning module 303 for determining that the integrity of the cell is abnormal 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, and generating early warning information for the cell.

[0137] Optionally, the device 300 comprises: a third obtaining module for obtaining a first average value of the levelized loss ratios of the cells in the group of cells; The device further includes a first determination module for determining a product of the first average value and a preset coefficient as the first preset threshold value.

[0138] Optionally, the device 300 comprises: a second determination module for determining a target cell in the group of cells using a preset policy; a fourth obtaining module for obtaining a first difference between a target equalized loss ratio of the target cell and the first average value; and a fifth obtaining module for dividing the first difference by the first average value to obtain the preset coefficient.

[0139] Optionally, the second determination module specifically: a first obtaining sub-module for sorting the cells in the cell group in ascending order of the equalized loss ratio and obtaining an order of each of the cells in the cell group; a second acquisition sub-module for acquiring a first cell in the group of cells, the order of which is greater than a predetermined order threshold; and a first determination submodule for determining, among the first cells, a first cell having the smallest equalized loss ratio as the target cell.

[0140] Optionally, the device 300 comprises: a sixth obtaining module for obtaining a decay amount based on a preset decay rate and a usage time of the group of cells; a seventh obtaining module for subtracting the step-down amount from a preset initial sequence threshold to obtain a second difference; a third determination module for determining the second difference as the predetermined final order threshold when the second difference is smaller than the predetermined final order threshold; and a fourth determination module for determining the final order threshold as the preset order threshold when the second difference is equal to or greater than the final order threshold.

[0141] Optionally, the second determination module specifically: a third acquisition sub-module for detecting the levelized loss ratios of cells in the cell group using a preset outlier detection algorithm, and acquiring a second cell in the cell group whose levelized loss ratio is abnormal; and a second determination submodule for determining, among the second cells, the second cell having the smallest equalized loss ratio as the target cell.

[0142] Optionally, the device 300 comprises: an eighth obtaining module for obtaining a second average value of the equalization operation rate of the cells in the group of cells; The fifth determining module determines a product of the second average value and a preset coefficient as the second preset threshold value.

[0143] Optionally, the first acquisition module 301 specifically: A fourth acquisition sub-module for acquiring a single charge amount that the cell charges each time and for acquiring a single discharge amount that the cell discharges each time; and a fifth acquisition sub-module for adding the single charge amount and the single discharge amount of each of the cells to acquire the charge / discharge amount of the cell.

[0144] Optionally, the first acquisition module 301 specifically: A sixth acquisition sub-module for acquiring the single consumption electricity amount of each equalization operation of the cell; and a seventh obtaining sub-module for adding up the single consumption electricity amount of each equalization operation of the cell to obtain the equalized consumption electricity amount.

[0145] Optionally, the sixth acquisition sub-module specifically includes: When the type of the cell equalization operation is passive equalization, a first acquisition unit is used to acquire a first electrical quantity of the cell at a start time of the cell equalization operation, and to acquire a second electrical quantity of the cell at an end time of the cell equalization operation; and a second obtaining unit for obtaining the absolute value of the difference between the first amount of electricity and the second amount of electricity as the single consumption amount of electricity for the equalization operation of the cell.

[0146] Optionally, the sixth acquisition sub-module specifically includes: a third acquisition unit for acquiring a third electrical quantity of the cell and a fourth electrical quantity of another cell at a start time of the cell equalization operation when the type of the cell equalization operation is active equalization, and acquiring a fifth electrical quantity of the cell and a sixth electrical quantity of the other cell at an end time of the cell equalization operation; a fourth obtaining unit for subtracting the fifth electrical quantity from the third electrical quantity to obtain a third difference, and for subtracting the fourth electrical quantity from the sixth electrical quantity to obtain a fourth difference; a fifth obtaining unit for subtracting the fourth difference from the third difference to obtain a fifth difference, and dividing the fifth difference by two to obtain a value as the single-time consumption electricity amount of the equalization operation of the cell; Here, 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.

[0147] Optionally, the first acquisition module 301 specifically: an eighth obtaining sub-module for obtaining the operation number of the equalization operation of the cell; a ninth acquisition sub-module for acquiring the number of times of charging and discharging of the cell, and adding the number of times of charging and the number of times of discharging to acquire the number of times of charging and discharging of the cell; a tenth obtaining sub-module for dividing the number of operations by the number of charging and discharging to obtain an equalizing operation rate of the cell.

[0148] The battery integrity early warning device in the embodiment of the present application may be a device, such as a component, integrated circuit, or chip in a terminal. The device may be a portable electronic device or a non-portable electronic device. For example, the portable electronic device may be a mobile phone, a tablet computer, a notebook computer, a palmtop computer, an in-vehicle electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook, or a personal digital assistant (PDA), and the non-portable electronic device may be a server, a network-attached storage (NAS), a personal computer (PC), a television (TV), an automated teller machine (ATM), or a self-service machine, but the embodiment of the present application is not specifically limited.

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

[0150] The battery integrity early warning device provided in the embodiment of the present application can realize each process realized by the battery integrity early warning device in the method embodiment of Figure 1, and to avoid duplication, the description will be omitted here.

[0151] In the embodiment of the present application, first obtain the charge / discharge amount of each cell in a battery cell group, then obtain the equalized power consumption of each cell, and obtain the equalization operation rate of each cell. Next, obtain the cell equalization loss rate based on the cell charge / discharge amount and the cell equalization power consumption. 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 generate cell early warning information so that operators can be notified and dealt with in time, further reducing the battery failure rate.

[0152] Optionally, the embodiments of the present application further provide an electronic device, including a processor, a memory, and a program or command stored in the memory and operable on the processor, which, when executed by the processor, realizes each step of the embodiments of the battery integrity early warning method and can achieve similar technical effects, and to avoid repetition, description thereof will be omitted here.

[0153] It should be noted that the electronic devices in the embodiments of the present application include the portable electronic devices and non-portable electronic devices described above.

[0154] FIG. 4 is a schematic diagram of the hardware structure of an electronic device for implementing an embodiment of the present application.

[0155] The electronic device 400 includes components such as, but not limited to, 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 will be understood by those skilled in the art, the electronic device 400 may further include a power source (e.g., a battery) for powering each component, and the power source may be logically connected to the processor 410 through 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 intended to limit the electronic device, and the electronic device may include more or fewer components than those shown, or may combine some components or have a different component arrangement, and description thereof will be omitted here.

[0157] Here, the processor 410 obtains the charge / discharge amount of each cell in the cell group of the battery, obtains the equalized consumed electricity amount of each cell, and obtains the equalization operation rate of each cell; Obtaining a levelized loss rate of the cell based on the charge / discharge amount of the cell and the levelized electricity consumption amount of 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, it is determined that the integrity of the cell is abnormal, and is used to generate early warning information for the cell.

[0158] In the embodiment of the present application, first obtain the charge / discharge amount of each cell in a battery cell group, then obtain the equalized power consumption of each cell, and obtain the equalization operation rate of each cell. Next, obtain the cell equalization loss rate based on the cell charge / discharge amount and the cell equalization power consumption. 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 generate cell early warning information so that operators can be notified and dealt with in time, further reducing the battery failure rate.

[0159] Optionally, the processor 410 is further used to obtain a first average value of the equalized loss ratios of the cells in the cell group, and determine the product of the first average value and a preset coefficient as the first preset threshold.

[0160] Optionally, the processor 410 is further configured to use a preset policy to determine a target cell in the group of cells, obtain a first difference between the target equalized loss ratio of the target cell and the first average value, and divide the first difference by the first average value to obtain the preset coefficient.

[0161] Optionally, the processor 410 is further used to sort the cells in the cell group in ascending order of the equalized loss ratio, obtain an order of each of the cells in the cell group, obtain a first cell in the cell group whose order is greater than a predetermined order threshold, and determine the first cell among the first cells with the smallest equalized loss ratio as the target cell.

[0162] Optionally, the processor 410 is further configured to obtain a decay amount based on a predetermined decay rate and the usage time of the cell group, subtract the decay amount from a predetermined initial sequence threshold to obtain a second difference, and if the second difference is smaller than the predetermined final sequence threshold, determine the second difference as the predetermined sequence threshold, and if the second difference is greater than or equal to the final sequence threshold, determine the final sequence threshold as the predetermined sequence threshold.

[0163] Optionally, the processor 410 is further configured to use a preset outlier detection algorithm to detect the equalized loss ratios of the cells in the cell group, obtain a second cell in the cell group whose equalized loss ratio is abnormal, and determine the second cell with the smallest equalized loss ratio among the second cells as the target cell.

[0164] Optionally, the processor 410 further obtains a second average value of the equalization operation rates of the cells in the cell group, and uses the product of the second average value and a predetermined coefficient to determine the second predetermined threshold value.

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

[0166] Optionally, the processor 410 is further used to obtain the single-time electricity consumption of each equalization operation of the cell, and add up the single-time electricity consumption of each equalization operation of the cell to obtain the equalized electricity consumption.

[0167] Optionally, when the type of the cell equalization operation is passive equalization, the processor 410 is further used to obtain a first electrical quantity of the cell at the start time of the cell equalization operation, and obtain a second electrical quantity of the cell at the end time of the cell equalization operation, and determine the absolute value of the difference between the first electrical quantity and the second electrical quantity as the single-time electrical quantity of the cell equalization operation.

[0168] Optionally, when the type of the cell equalization operation is active equalization, the processor 410 further obtains the third electrical quantity of the cell and the fourth electrical quantity of the other cells at the start time of the cell equalization operation, and obtains the fifth electrical quantity of the cell and the sixth electrical quantity of the other cells at the end time of the cell equalization operation, subtracts the fifth electrical quantity from the third electrical quantity to obtain a third difference, subtracts the fourth electrical quantity from the sixth electrical quantity to obtain a fourth difference, subtracts the fourth difference from the third difference to obtain a fifth difference, and divides the fifth difference by 2 to obtain a single-time consumption electrical quantity of the cell equalization operation, wherein the other cells have lower electrical energy than the cell, and the cell equalization operation flows the electrical energy of the cell to the other cells.

[0169] Optionally, the processor 410 is further used to obtain the number of operations of the equalization operation of the cell, obtain the number of charging times and the number of discharging times of the cell, add the number of charging times and the number of discharging times to obtain the number of charging and discharging times of the cell, and divide the number of operations by the number of charging and discharging times to obtain the equalization operation rate of the cell.

[0170] In the embodiment of the present application, first obtain the charge / discharge amount of each cell in a battery cell group, then obtain the equalized power consumption of each cell, and obtain the equalization operation rate of each cell. Next, obtain the cell equalization loss rate based on the cell charge / discharge amount and the cell equalization power consumption. 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 generate cell early warning information so that operators can be notified and dealt with in time, further reducing the battery failure rate.

[0171] It should be understood that in the present embodiment, the input unit 404 may include a graphics processing unit (GPU) 4041 and a microphone 4042. The graphics processor 4041 processes image data of still or video images acquired by an image acquisition device (e.g., a camera) in a video acquisition mode or an image acquisition mode. The display unit 406 may include a display panel 4061, which may be configured using a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 407 includes at least one of a touch panel 4071 and other input devices 4072. The touch panel 4071 is also called a touch screen. The touch panel 4071 may include two parts: a touch detection device and a touch controller. The 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 a control lever, and descriptions thereof will be omitted here.

[0172] The memory 409 can be used to store software programs and various data. The memory 409 may include a first storage area that mainly stores programs or commands and a second storage area that stores data. Here, the first storage area may store an operating system, an application program or commands required for at least one function (e.g., audio playback function, image playback function, etc.), etc. In addition, the memory 409 may include volatile memory or nonvolatile memory, or may include both volatile memory and nonvolatile memory. Here, the nonvolatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory may be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct memory bus random access memory (DRRAM). Memory 409 in embodiments of the present 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 may include an application processor that mainly processes operations related to an operating system, a user interface, and application programs, and a modem that mainly processes wireless communication signals, such as a baseband processor. It should be understood that the modem does not have to be integrated into the processor 410.

[0174] The embodiments of the present application further provide a readable storage medium, in which a program or command is stored, and when the program or command is executed by a processor, each process of the embodiments of the battery integrity early warning method can be realized and similar technical effects can be achieved. To avoid repetition, the description will be omitted here.

[0175] The processor may be the processor in the electronic device described in the above embodiment. The readable storage medium may include a computer-readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0176] The embodiments of the present application further provide a chip, the chip including a processor and a communication interface, the communication interface coupled to the processor, the processor is used to execute programs or commands to realize each step of the embodiments of the battery integrity early warning method, and can achieve similar technical effects, so that the description will be omitted here to avoid redundancy.

[0177] It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system level chips, system chips, chip systems, or system-on-chip chips.

[0178] It should be noted that, in this specification, the terms "comprise," "include," or any other variation thereof are intended to cover a non-exclusive inclusion, whereby a process, method, article, or apparatus comprising a set of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent in such process, method, article, or apparatus. Absent more limitations, elements qualified by the phrase "comprise..." do not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element. It should also be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, and further includes performing functions essentially simultaneously or in the reverse order based on related functionality. For example, the described method may be performed in a different order than described, and various steps may be added, omitted, or combined. Furthermore, features described with reference to some embodiments may be combined in other examples.

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

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

Claims

1. Obtaining the charge / discharge amount of each cell in a cell group of a battery, obtaining the equalized consumed electricity amount of each cell, and obtaining the equalization operation rate of each cell; Obtaining a levelized loss rate of the cell based on the charge / discharge amount of the cell and the levelized electricity consumption amount of the cell; and determining that the cell is in an abnormal state 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, and generating early warning information for the cell.

2. The method comprises: obtaining a first average value of the levelized loss ratios of the cells in the group of cells; 2. The method of claim 1, further comprising: determining the product of the first average value and a preset coefficient as the first preset threshold value.

3. The method comprises: determining a target cell in the group of cells using a predefined policy; obtaining a first difference between a target levelized loss rate of the target cell and the first average value; 3. The method of claim 2, further comprising: dividing the first difference by the first average value to obtain the predetermined coefficient.

4. The step of determining a target cell in the group of cells using a preset policy comprises: sorting the cells in the group of cells in ascending order of the equalized loss ratio to obtain an order of each of the cells in the group of cells; obtaining a first cell in the group of cells whose order is greater than a predetermined order threshold; The method of claim 3 , further comprising: determining, as the target cell, the first cell having the smallest equalized loss ratio among the first cells.

5. The method comprises: obtaining a decay amount based on a preset decay rate and a usage time of the cell group; subtracting the step-down amount from a preset initial sequence threshold to obtain a second difference; If the second difference is smaller than a preset final order threshold, determining the second difference as the preset final order threshold; The method of claim 4 , further comprising: if the second difference is greater than or equal to the final order threshold, determining the final order threshold as the preset order threshold.

6. The step of determining a target cell in the group of cells using a preset policy comprises: Detecting the levelized loss ratios of the cells in the cell group using a preset outlier detection algorithm, and acquiring a second cell in the cell group whose levelized loss ratio is abnormal; and determining, as the target cell, the second cell having the smallest equalized loss ratio among the second cells.

7. The method comprises: obtaining a second average value of the equalization operation rate of the cells in the cell group; 2. The method of claim 1, further comprising: determining the product of the second average value and a preset coefficient as the second preset threshold value.

8. The step of acquiring the charge / discharge amount of each cell in the cell group of the battery includes: Obtaining a single charge amount that the cell charges each time, and obtaining a single discharge amount that the cell discharges each time; 2. The method of claim 1, further comprising: adding the single charge amount and the single discharge amount of the cell to obtain the charge / discharge amount of the cell.

9. The step of acquiring the equalized consumed electricity amount of each of the cells includes: Obtaining the amount of electricity consumed in each equalization operation of the cell; and adding up the single consumption amount of electricity of each equalization operation of the cell to obtain the equalized consumption amount of electricity.

10. The step of acquiring the amount of electricity consumed in each equalization operation of the cell includes: When the type of the cell equalization operation is passive equalization, obtaining a first electrical quantity of the cell at a start time of the cell equalization operation, and obtaining a second electrical quantity of the cell at an end time of the cell equalization operation; 10. The method according to claim 9, further comprising the step of: setting the absolute value of the difference between the first electrical quantity and the second electrical quantity as the electrical quantity consumed in a single operation of equalizing the cell.

11. The step of acquiring the amount of electricity consumed in each equalization operation of the cell includes: When the type of the cell equalization operation is active equalization, at the start time of the cell equalization operation, obtain a third electrical quantity of the cell and a fourth electrical quantity of another cell, and at the end time of the cell equalization operation, obtain a fifth electrical quantity of the cell and a sixth electrical quantity of the other cell; subtracting the fifth electrical quantity from the third electrical quantity to obtain a third difference, and subtracting the fourth electrical quantity from the sixth electrical quantity to obtain a fourth difference; a step of subtracting the fourth difference from the third difference to obtain a fifth difference, and dividing the fifth difference by two to obtain a single-time consumption amount of electricity for the cell equalization operation; 10. The method of claim 9, wherein the other cells have a 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 an equalization operation rate for each of the cells includes: obtaining the number of equalization operations of the cells; Obtaining the number of times the cell has been charged and discharged, and adding the number of times the cell has been charged and discharged to obtain the number of times the cell has been charged and discharged; and dividing the number of operations by the number of charge / discharge cycles to obtain an equalization operation rate for the cell.

13. a first acquisition module for acquiring the charge / discharge amount of each cell in a cell group of a battery, acquiring the equalized consumed electricity amount of each cell, and acquiring the equalization operation rate of each cell; A second acquisition module is configured to acquire a levelized loss rate of the cell based on the charge / discharge amount of the cell and the levelized consumption amount of the cell; an early warning module for determining that the integrity of the cell is abnormal 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, and generating early warning information for the cell.

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

15. A readable storage medium having stored thereon a program or command that, when executed by a processor, implements the steps of the battery integrity early warning method according to any one of claims 1 to 12.

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