Voltage early warning method, device, equipment and storage medium

Abstract

The invention discloses a voltage early warning method, device and equipment and a storage medium, and relates to the technical field of batteries, and the method comprises the steps: carrying out the data interception of a single battery voltage list at a plurality of time points according to the vehicle key information of a target vehicle, and obtaining the voltage data of a target standing segment; determining voltage parameters of each single battery pack at each target time point in the target standing section according to the voltage data; performing voltage analysis according to the voltage parameter of each single battery pack at each target time point, and determining a single voltage analysis result; and performing voltage early warning based on the analysis result. By means of the mode, the problems that in the prior art, the voltage of the single battery is misreported and missed, and the performance of the single battery cannot be deeply analyzed and predicted are solved, accurate monitoring and deep analysis of the voltage of the single battery of the electric vehicle are achieved, layered early warning is achieved, meanwhile, the early warning accuracy is guaranteed, and the early warning efficiency is improved. And the safety and the reliability of the electric automobile are improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a voltage early warning method, device, equipment and storage medium. Background Art

[0002] With the increasing global attention to environmental protection and energy crisis, electric vehicles (EVs), as representatives of new energy vehicles, have become an important choice for future transportation. The safety and reliability of power batteries, the core components of electric vehicles, are directly related to the performance of the entire vehicle and the safety of users. However, the power battery system is composed of multiple single cells, and the performance and status of each single cell may vary. These differences may cause safety problems during the use of electric vehicles, such as battery thermal runaway, overcharging, over-discharging, etc.

[0003] Traditional power battery fault warning methods mainly rely on real-time data monitoring of the battery management system (BMS), but these methods can only perform simple threshold judgments on single cells and cannot perform in-depth analysis and prediction of battery performance. At the same time, due to the complex and changeable operating environment of electric vehicles, traditional warning methods often have problems with false alarms and missed alarms. Summary of the invention

[0004] The main purpose of the present application is to provide a voltage warning method, device, equipment and storage medium, aiming to solve the technical problem that the prior art cannot perform in-depth analysis of the performance of single cells, resulting in a high error rate when performing single cell voltage warning.

[0005] To achieve the above objectives, the present application proposes a voltage early warning method, which includes:

[0006] According to the key vehicle information of the target vehicle, data of the single battery voltage list of the target vehicle at multiple time points is intercepted to obtain voltage data of the target static section;

[0007] Determining voltage parameters of each single battery group at each target time point within the target static section according to the voltage data of the target static section;

[0008] Comparing the voltage parameters of each single battery group at each target time point and / or comparing the voltage parameters of each single battery group at each target time point with the target parameter range to determine the single battery voltage analysis result of the target vehicle;

[0009] A voltage warning is performed based on the monomer voltage analysis result.

[0010] In one embodiment, before the step of intercepting data of the single battery voltage list of the target vehicle at multiple time points according to the vehicle key information of the target vehicle to obtain the voltage data of the target static section, the step further includes:

[0011] Obtaining a list of initial voltages of a target vehicle at multiple time points and key vehicle information of the target vehicle stored in the cloud;

[0012] Determine a vehicle identification code according to the vehicle key information;

[0013] Determine the actual number of battery cells of the target vehicle according to the vehicle identification code;

[0014] The initial voltage list at each time point is processed according to the actual number of battery cells and the target voltage range to obtain a single cell voltage list of the target vehicle at multiple time points.

[0015] In one embodiment, the step of intercepting data of a single cell voltage list of the target vehicle at multiple time points according to the vehicle key information of the target vehicle to obtain voltage data of the target static section includes:

[0016] Determine the single cell battery current information and the vehicle driving speed of the target vehicle at each time point according to the key vehicle information of the target vehicle;

[0017] Determine the target static section according to the single battery current information at each time point and the vehicle driving speed at each time point;

[0018] According to the target static section, data of a single cell voltage list of the target vehicle at each time point is intercepted to determine voltage data of the target static section.

[0019] In one embodiment, the step of determining the voltage parameters of each single battery group at each target time point in the target static section according to the voltage data of the target static section includes:

[0020] Perform voltage mean calculation based on the voltage data of the target static section to determine the average voltage of each single battery group at each target time point in the target static section;

[0021] Determining the target total voltage of each single battery group at each target time point in the target static section according to the voltage data of the target static section;

[0022] The voltage parameters of each single battery group at each target time point are determined according to the target total voltage of each single battery group at each target time point and the average voltage of each single battery group.

[0023] In one embodiment, the step of comparing the voltage parameters of each single battery group at each target time point to determine the single battery voltage analysis result of the target vehicle includes:

[0024] Determine the target total voltage of each single battery group and the average voltage of each single battery group at each target time point according to the voltage parameters of each single battery group at each target time point;

[0025] Calculate the difference between the first single battery group and the second single battery group at each target time point according to the target total voltage of each single battery group at each target time point, and determine the overall voltage difference at each target time point;

[0026] The single cell voltage analysis result of the target vehicle is determined according to the overall voltage difference at each target time point, the average voltage of each single cell group and the target total voltage of each single cell group.

[0027] In one embodiment, the step of determining the single cell voltage analysis result of the target vehicle according to the overall voltage difference at each target time point, the average voltage of each single cell group, and the target total voltage of each single cell group includes:

[0028] Calculate the difference between the first single battery group and the second single battery group at each target time point according to the extreme voltage of each single battery group at each target time point, and determine the first voltage difference at each target time point;

[0029] When the first voltage difference at each target time point is greater than or equal to the first voltage threshold, the average voltage of the first single battery group at each target time point is greater than the average voltage of the second single battery group, the target total voltage of the first single battery group at each target time point is greater than the target total voltage of the second single battery group, and the overall voltage difference at each target time point is greater than the second voltage threshold, it is determined that the single battery voltage analysis result of the target vehicle is that single battery voltage stratification exists.

[0030] In one embodiment, the step of determining the single cell voltage analysis result of the target vehicle according to the overall voltage difference at each target time point, the average voltage of each single cell group, and the target total voltage of each single cell group includes:

[0031] Calculate the difference between the first single battery group and the second single battery group at each target time point according to the extreme voltage of each single battery group at each target time point, and determine the second voltage difference at each target time point;

[0032] When the second voltage difference at each target time point is greater than or equal to the first voltage threshold, the average voltage of the first single battery group at each target time point is less than the average voltage of the second single battery group, the target total voltage of the first single battery group at each target time point is less than the target total voltage of the second single battery group, and the overall voltage difference at each target time point is greater than the third voltage threshold, it is determined that the single battery voltage analysis result of the target vehicle is that single battery voltage stratification exists.

[0033] In addition, to achieve the above purpose, the present application also proposes a voltage early warning device, the voltage early warning device comprising:

[0034] An interception module is used to intercept data of a single battery voltage list of the target vehicle at multiple time points according to the key vehicle information of the target vehicle, so as to obtain voltage data of the target static section;

[0035] A processing module, configured to determine voltage parameters of each single battery pack at each target time point within the target resting section according to the voltage data of the target resting section;

[0036] The processing module is further used to compare the voltage parameters of each single battery group at each target time point and / or compare the voltage parameters of each single battery group at each target time point with the target parameter range to determine the single battery voltage analysis result of the target vehicle;

[0037] The early warning module is used for performing voltage early warning based on the single cell voltage analysis result.

[0038] In addition, to achieve the above objectives, the present application also proposes a voltage warning device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the voltage warning method described above.

[0039] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the voltage warning method described above are implemented.

[0040] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the steps of the voltage early warning method described above are implemented.

[0041] The present application intercepts data of the single cell voltage list of the target vehicle at multiple time points according to the key vehicle information of the target vehicle to obtain the voltage data of the target static section; determines the voltage parameters of each single cell group at each target time point in the target static section according to the voltage data of the target static section; compares the voltage parameters of each single cell group at each target time point and / or compares the voltage parameters of each single cell group at each target time point with the target parameter range to determine the single cell voltage analysis result of the target vehicle; and performs voltage warning based on the single cell voltage analysis result. In the above manner, the voltage parameters of each single cell group at each time point are determined based on the voltage data of the target static section, voltage analysis is performed based on the voltage parameters of each single cell group at each target time point, and voltage warning is performed based on the analysis results, which solves the problems of false reporting, missed reporting and inability to deeply analyze and predict single cell performance in the prior art, realizes accurate monitoring and in-depth analysis of the single cell voltage of electric vehicles, ensures the accuracy of warning while realizing layered warning, and improves the safety and reliability of electric vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0043] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0044] Figure 1 A schematic diagram of a flow chart provided for the first embodiment of the voltage warning method of the present application;

[0045] Figure 2 A schematic diagram of a flow chart provided for the second embodiment of the voltage warning method of the present application;

[0046] Figure 3 This is a schematic diagram of the module structure of the voltage warning device according to an embodiment of the present application;

[0047] Figure 4 Schematic diagram of the device structure of the hardware operating environment involved in the voltage warning method in the embodiment of the present application.

[0048] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0049] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0050] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0051] The main solution of the embodiment of the present application is: according to the vehicle key information of the target vehicle, the data of the single cell battery voltage list of the target vehicle at multiple time points is intercepted to obtain the voltage data of the target static section; according to the voltage data of the target static section, the voltage parameters of each single cell battery group at each target time point within the target static section are determined; the voltage parameters of each single cell battery group at each target time point are compared respectively and / or the voltage parameters of each single cell battery group at each target time point are compared with the target parameter range respectively to determine the single cell voltage analysis result of the target vehicle; and voltage warning is performed based on the single cell voltage analysis result.

[0052] With the increasing global attention to environmental protection and energy crisis, electric vehicles (EVs), as representatives of new energy vehicles, have become an important choice for future transportation. The safety and reliability of power batteries, the core components of electric vehicles, are directly related to the performance of the entire vehicle and the safety of users. However, the power battery system is composed of multiple single cells, and the performance and status of each single cell may vary. These differences may cause safety problems during the use of electric vehicles, such as battery thermal runaway, overcharging, over-discharging, etc.

[0053] Traditional power battery fault warning methods mainly rely on real-time data monitoring of the battery management system (BMS), but these methods can only perform simple threshold judgments on single cells and cannot perform in-depth analysis and prediction of battery performance. At the same time, due to the complex and changeable operating environment of electric vehicles, traditional warning methods often have problems with false alarms and missed alarms.

[0054] The present application provides a solution, which determines the voltage parameters of each single battery group at each time point based on the voltage data of the target static section, performs voltage analysis based on the voltage parameters of each single battery group at each target time point, and performs voltage warning based on the analysis result, thereby solving the problems of false alarm and missed alarm of single battery voltage and inability to deeply analyze and predict single battery performance in the prior art, and realizes accurate monitoring and in-depth analysis of the single battery voltage of electric vehicles, ensures the accuracy of warning while realizing layered warning, and improves the safety and reliability of electric vehicles.

[0055] It should be noted that the execution subject of this embodiment can be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or a voltage early warning device capable of realizing the above functions, etc. The following takes the voltage early warning device as an example of the execution subject to illustrate this embodiment and the following embodiments.

[0056] Based on this, the present application embodiment provides a voltage early warning method, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the voltage early warning method of the present application.

[0057] In this embodiment, the voltage early warning method includes steps S10 to S40:

[0058] Step S10 , intercepting data of a single cell voltage list of the target vehicle at multiple time points according to the key vehicle information of the target vehicle, and obtaining voltage data of the target static section.

[0059] It should be noted that each time point corresponds to a single cell voltage list, each single cell voltage list contains the voltage value corresponding to each single cell, and the voltage values ​​contained in the single cell voltage list are all within the target voltage range. In this embodiment, the target voltage range can be set to (0, 4.8V). The key information of the vehicle includes but is not limited to the vehicle identification number (VIN), the driving speed corresponding to each time point, the highest voltage, the lowest voltage, the current, and the charge and discharge status and other key information.

[0060] It can be understood that the target static segment refers to a time period when the current is within the preset current range and there is no corresponding driving speed. The target static segment can be determined by the key information of the vehicle, and the multiple time points in the target static segment are the target time points. In this embodiment, the preset current range refers to (-10A, 10A). Based on the target static segment, the list of single cell voltages at each time point is screened to obtain the list of single cell voltages corresponding to the target static segment. In this embodiment, the voltage data of the target static segment refers to the list of single cell voltages corresponding to the target static segment.

[0061] In a feasible implementation manner, before step S10, steps A11 to A14 may be included:

[0062] Step A11, obtaining a list of initial voltages of the target vehicle at multiple time points and key vehicle information of the target vehicle stored in the cloud.

[0063] It should be noted that when acquiring the data from the cloud BMS, information including VIN, time, SOC (State of Charge), maximum voltage, minimum voltage, current, initial voltage list, and charge and discharge status are intercepted, and the above data will be used as important parameters for subsequent analysis. In this embodiment, the key information of the vehicle includes but is not limited to VIN, time, SOC (State of Charge), maximum voltage, minimum voltage, current, and charge and discharge status; the initial voltage list refers to the voltage list of single cells without abnormal data elimination.

[0064] Step A12, determining a vehicle identification code according to the vehicle key information.

[0065] Step A13, determining the actual number of battery cells of the target vehicle according to the vehicle identification code.

[0066] Step A14, processing the initial voltage list at each time point according to the actual number of battery cells and the target voltage range, to obtain a single cell voltage list of the target vehicle at multiple time points.

[0067] It should be noted that the vehicle identification code of the target vehicle is determined based on the vehicle key information, and the actual number of battery cells of the target vehicle is obtained by checking the static information table. The initial voltage list at each time point is cleaned according to the actual number of battery cells to obtain a voltage list with the correct number of battery cells. The highest and lowest voltages are obtained through the voltage list, and voltage values ​​that are not within the target voltage range are eliminated. The highest and lowest voltage values ​​are limited within the target voltage range, thereby obtaining a list of single cell voltages of the target vehicle at multiple time points.

[0068] In a feasible implementation, step S10 may include steps B11 to B13:

[0069] Step B11, determining the single cell current information and the vehicle running speed of the target vehicle at each time point according to the key vehicle information of the target vehicle.

[0070] It should be noted that the vehicle key information of the target vehicle includes the charge and discharge current of the single battery of the target vehicle at each time point and the vehicle driving speed. In this embodiment, the single battery current information of the target vehicle at each time point refers to the charge and discharge current of the single battery of the target vehicle at each time point.

[0071] Step B12, determining the target static section according to the single battery current information at each time point and the vehicle driving speed at each time point.

[0072] It should be noted that, based on the single cell current information at each time point and the vehicle driving speed at each time point, a time period in which the current is within a preset current range and does not correspond to the driving speed is determined, and this time period is used as the target static section.

[0073] Step B13, intercepting data of a list of single cell voltages of the target vehicle at each time point according to the target static section, and determining voltage data of the target static section.

[0074] It should be noted that the single cell voltage list at each time point is screened based on the target static section, so as to obtain the single cell voltage list corresponding to the target static section.

[0075] Step S20 , determining voltage parameters of each single battery group at each target time point in the target rest period according to the voltage data of the target rest period.

[0076] It should be noted that, since there are multiple single cells in the target vehicle, for the convenience of management, the multiple single cells are grouped and controlled to obtain multiple single cell groups. In this embodiment, there are two single cell groups, namely the first single cell group and the second single cell group, and the single cell group can also be called a slave control module. For example, there are 96 single cells, and the slave control module 1 and the slave control module 2 each contain 48 single cells.

[0077] It is understandable that the voltage parameters include but are not limited to the average voltage, total voltage, maximum voltage and minimum voltage of each single battery group corresponding to each target time point in the target rest period.

[0078] In a feasible implementation manner, step S20 may include steps C11 to C13:

[0079] Step C11, performing voltage average calculation according to the voltage data of the target static section, and determining the average voltage of each single battery group at each target time point in the target static section.

[0080] Step C12, determining the target total voltage of each single battery group at each target time point in the target rest period according to the voltage data of the target rest period.

[0081] Step C13, determining the voltage parameters of each single battery group at each target time point according to the target total voltage of each single battery group at each target time point and the average voltage of each single battery group.

[0082] It should be noted that the voltage average and voltage sum are calculated based on the voltage data of the target static section to determine the average voltage volt_avg and target total voltage volt_sum corresponding to each single battery group at each target time point, thereby obtaining the voltage parameters of each single battery group at each target time point.

[0083] Step S30 , comparing the voltage parameters of each single battery group at each target time point and / or comparing the voltage parameters of each single battery group at each target time point with the target parameter range to determine the single battery voltage analysis result of the target vehicle.

[0084] It should be noted that, for each target time point, the voltage parameters between each single cell battery group are compared to determine whether there is single cell voltage stratification between the single cell battery groups; for each target time point, it can be determined whether there is a single cell voltage value in each single cell battery group that is not within the target voltage range, thereby determining whether there are problems such as battery inconsistency, and finally obtaining a single cell voltage analysis result to determine whether there is an abnormal situation. In this embodiment, when there is a voltage abnormality, the single cell voltage analysis result is the specific type of the voltage abnormality, such as when there is a single cell voltage stratification between the first single cell battery group and the second single cell battery group, in which case the single cell voltage analysis result is that there is a single cell voltage stratification; when there is no voltage abnormality, the single cell voltage analysis result is that there is no voltage abnormality. In this embodiment, the target parameter range refers to the target voltage range, and the ranges corresponding to other parameters can also be set according to requirements, which is not limited in this embodiment.

[0085] Step S40: issuing a voltage warning based on the cell voltage analysis result.

[0086] It should be noted that when the single cell voltage analysis result shows that there is a voltage abnormality, a voltage warning is issued based on the specific type contained in the single cell voltage analysis result, and the customer and after-sales quality are notified via SMS or email to carry out repairs, thereby improving the user experience.

[0087] This embodiment intercepts the data of the single cell voltage list of the target vehicle at multiple time points according to the vehicle key information of the target vehicle to obtain the voltage data of the target static section; determines the voltage parameters of each single cell group at each target time point in the target static section according to the voltage data of the target static section; compares the voltage parameters of each single cell group at each target time point and / or compares the voltage parameters of each single cell group at each target time point with the target parameter range to determine the single cell voltage analysis result of the target vehicle; and performs voltage warning based on the single cell voltage analysis result. In the above manner, the voltage parameters of each single cell group at each time point are determined based on the voltage data of the target static section, voltage analysis is performed based on the voltage parameters of each single cell group at each target time point, and voltage warning is performed based on the analysis result, which solves the problems of false reporting, missed reporting and inability to deeply analyze and predict single cell performance in the prior art, realizes accurate monitoring and in-depth analysis of the single cell voltage of electric vehicles, ensures the accuracy of warning while realizing layered warning, and improves the safety and reliability of electric vehicles.

[0088] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above-mentioned embodiment 1 can be referred to the above introduction, and will not be repeated in the following. Figure 2 In the voltage early warning method, step S30 compares the voltage parameters of each single battery pack at each target time point, and determining the single battery voltage analysis result of the target vehicle also includes steps S31 to S33:

[0089] Step S31 , determining a target total voltage of each single battery group and an average voltage of each single battery group at each target time point according to the voltage parameters of each single battery group at each target time point.

[0090] Step S32, calculating the difference between the first single battery group and the second single battery group at each target time point according to the target total voltage of each single battery group at each target time point, and determining the overall voltage difference at each target time point.

[0091] It should be noted that, for each time point: the difference between the target total voltages of the first single battery group and the second single battery group is calculated, and the absolute value of the difference is used as the overall voltage difference at the time point, thereby obtaining the overall voltage difference at each target time point.

[0092] Step S33, determining the single cell voltage analysis result of the target vehicle according to the overall voltage difference at each target time point, the average voltage of each single cell group and the target total voltage of each single cell group.

[0093] It should be noted that, for each target time point: the average voltage and target total voltage of the first single-cell battery group are compared with the average voltage and target total voltage of the second single-cell battery group respectively, and the overall voltage difference is compared with the set voltage difference threshold, and based on the comparison result, it is determined whether there is single-cell voltage stratification between the single-cell battery groups, thereby obtaining the single-cell voltage analysis result.

[0094] In a feasible implementation, step S33 may include steps D11 to D12:

[0095] Step D11 , calculating the difference between the first single cell group and the second single cell group at each target time point according to the extreme voltage of each single cell group at each target time point, and determining the first voltage difference at each target time point.

[0096] It should be noted that, for each target time point: the extreme voltage of each single battery group refers to the highest voltage and the lowest voltage of each single battery group. The first voltage difference volt_min1-volt_max2 is obtained by subtracting the highest voltage of the second single battery group from the lowest voltage of the first single battery group.

[0097] Step D12, when the first voltage difference at each target time point is greater than or equal to the first voltage threshold, the average voltage of the first single battery group at each target time point is greater than the average voltage of the second single battery group, the target total voltage of the first single battery group at each target time point is greater than the target total voltage of the second single battery group, and the overall voltage difference at each target time point is greater than the second voltage threshold, it is determined that the single battery voltage analysis result of the target vehicle is that single battery voltage stratification exists.

[0098] It should be noted that for all target time points, when the following conditions are met, it means that there is a single cell voltage stratification between the first single cell group and the second cell group, and the single cell voltage analysis result is that there is a single cell voltage stratification: the first voltage difference is greater than or equal to the first voltage threshold, the average voltage of the first single cell group is greater than the average voltage of the second single cell group, the target total voltage of the first single cell group is greater than the target total voltage of the second single cell group, and the overall voltage difference is greater than the second voltage threshold. In this embodiment, the first voltage threshold is a set extreme value difference threshold, which can be set to 7mV or adjusted according to specific needs; the second voltage threshold is a set overall voltage difference threshold, which can be set to 40mV or adjusted according to specific needs, that is, volt_avg1>volt_avg2&volt_sum1>volt_sum2&volt_min1-volt_max2>=7&volt_delta>40mV.

[0099] In a feasible implementation, step S33 may include steps E11 to E12:

[0100] Step E11, calculating the difference between the first single battery group and the second single battery group at each target time point according to the extreme voltage of each single battery group at each target time point, and determining the second voltage difference at each target time point.

[0101] It should be noted that, for each target time point: the lowest voltage value of the first single cell group is subtracted from the lowest voltage value of the second single cell group, so as to obtain the second voltage difference volt_min2-volt_min1.

[0102] Step E12, when the second voltage difference at each target time point is greater than or equal to the first voltage threshold, the average voltage of the first single battery group at each target time point is less than the average voltage of the second single battery group, the target total voltage of the first single battery group at each target time point is less than the target total voltage of the second single battery group, and the overall voltage difference at each target time point is greater than the third voltage threshold, it is determined that the single battery voltage analysis result of the target vehicle is that single battery voltage stratification exists.

[0103] It should be noted that for all target time points, when the following conditions are met, it means that there is a single cell voltage stratification between the first single cell group and the second cell group. At this time, the single cell voltage analysis result is that there is a single cell voltage stratification: the second voltage difference is greater than or equal to the first voltage threshold, the average voltage of the first single cell group is less than the average voltage of the second single cell group, the target total voltage of the first single cell group is less than the target total voltage of the second single cell group, and the overall voltage difference is greater than the third voltage threshold. In this embodiment, the first voltage threshold is the set extreme value difference threshold, which can be set to 7mV and can also be adjusted according to specific needs; the third voltage threshold is the set overall voltage difference threshold, which can be set to 60mV and can also be adjusted according to specific needs, that is, volt_avg1 <volt_avg2&volt_sum1<volt_sum2&volt_min2-volt_min1> =7&volt_delta>60mV.

[0104] This embodiment determines the target total voltage of each single battery group and the average voltage of each single battery group at each target time point according to the voltage parameters of each single battery group at each target time point; calculates the difference between the first single battery group and the second single battery group at each target time point according to the target total voltage of each single battery group at each target time point, and determines the overall voltage difference at each target time point; determines the single battery voltage analysis result of the target vehicle according to the overall voltage difference at each target time point, the average voltage of each single battery group, and the target total voltage of each single battery group. In the above manner, the single battery voltage stratification problem existing in the battery of the vehicle can be effectively identified.

[0105] For example, in order to help understand the implementation process of the voltage early warning method obtained by combining this embodiment with the above-mentioned embodiment 1, specifically:

[0106] The method of this embodiment specifically includes the following steps: Step 1: When obtaining data from the cloud BMS (battery management system), key information including VIN (vehicle identification code), time, SOC, maximum voltage, minimum voltage, current, voltage list, charging and discharging status, etc. is intercepted.

[0107] Step 2: Data cleaning: Get the actual number of cells in each vehicle by checking the static information table, and get the voltage list of the correct number of cells by sorting the cell numbers; get the highest and lowest voltages from the voltage list; the highest and lowest voltages are limited to the range of (0, 4.8V);

[0108] Step 3: Obtain the static segment data in the data, intercept the index of the middle point of the entire static segment, and calculate the average voltage of slave control module 1 and the average voltage of slave control module 2, and calculate the total voltage of slave control module 1 and slave control module 2;

[0109] Step 4: For each time point: If the average voltage (volt_avg1) and total voltage (volt_sum1) of slave control module 1 are greater than the total voltage (volt_sum2) and average voltage (volt_avg2) of slave control module 2, and the minimum voltage value (volt_min1) of slave control module 1 is 7mV greater than the maximum voltage value (volt_max2) of slave control module 2, and the overall voltage difference (volt_delta) is greater than 40mV, then it is considered that there is a single cell voltage stratification between slave control module 1 and slave control module 2, volt_avg1>volt_avg2&volt_sum1>volt_sum 2&volt_min1-volt_max2>=7&volt_delta>40mV; If the average voltage (volt_avg1) and total voltage (volt_sum1) of slave control module 1 are less than the total voltage (volt_sum2) and average voltage (volt_avg2) of slave control module 2, and the highest voltage value (volt_max1) of slave control module 1 is 7mV less than the lowest voltage value (volt_min2) of slave control module 2, and the overall voltage difference (volt_delta) is greater than 60mV, then it is considered that there is a single voltage stratification between slave control module 1 and slave control module 2, volt_avg1 <volt_avg2&volt_sum1<volt_sum2&volt_min2-volt_min1> =7&volt_delta>60mV.

[0110] Step 5: Based on the results of the early warning, notify customers and after-sales quality through SMS or email to carry out repairs to improve user experience. After market investigation and verification, the algorithm accuracy rate is 97%, which can effectively identify the problem of single cell voltage stratification in electric vehicle batteries.

[0111] The method of this embodiment has the following advantages: Improve the accuracy of early warning: Through big data analysis technology, it is possible to deeply explore the changing patterns and characteristic information of the single cell battery voltage, and improve the accuracy of early warning. Reduce the false alarm rate: It is possible to reduce the false alarm rate and reduce unnecessary user troubles. Improve the timeliness of early warning: The cloud platform monitoring data can realize timely monitoring and early warning of single cell battery voltage, and timely discover and deal with potential safety issues. Enhance system reliability: By adjusting the charging strategy, limiting the vehicle speed and other measures, the probability of safety problems such as battery thermal runaway can be reduced, and the reliability of the electric vehicle system can be improved. Facilitate user maintenance: The early warning information will be notified to the user in a timely manner through the cloud platform, and the user can perform corresponding maintenance and inspection according to the early warning information, thereby improving the user experience.

[0112] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the voltage warning method of the present application. More simple transformations based on this technical concept are all within the protection scope of the present application.

[0113] This application also provides a voltage warning device, please refer to Figure 3 , the voltage early warning device comprises:

[0114] The interception module 10 is used to intercept data of a single cell voltage list of the target vehicle at multiple time points according to the key vehicle information of the target vehicle, so as to obtain voltage data of the target static section.

[0115] The processing module 20 is used to determine the voltage parameters of each single battery group at each target time point in the target rest period according to the voltage data of the target rest period.

[0116] The processing module 20 is further used to compare the voltage parameters of each single battery group at each target time point and / or compare the voltage parameters of each single battery group at each target time point with the target parameter range to determine the single battery voltage analysis result of the target vehicle.

[0117] The early warning module 30 is used to issue a voltage early warning based on the single cell voltage analysis result.

[0118] Optionally, the interception module 10 is further used for:

[0119] Obtain a list of initial voltages of a target vehicle at multiple time points and key vehicle information of the target vehicle stored in the cloud; determine a vehicle identification code based on the key vehicle information; determine the actual number of battery cells of the target vehicle based on the vehicle identification code; process the list of initial voltages at each time point based on the actual number of battery cells and the target voltage range to obtain a list of single cell voltages of the target vehicle at multiple time points.

[0120] Optionally, the interception module 10 is further used for:

[0121] According to the key vehicle information of the target vehicle, the single cell current information of the target vehicle at each time point and the vehicle driving speed at each time point are determined; according to the single cell current information at each time point and the vehicle driving speed at each time point, a target static section is determined; according to the target static section, data is intercepted from the single cell voltage list of the target vehicle at each time point to determine the voltage data of the target static section.

[0122] Optionally, the processing module 20 is further used for:

[0123] The voltage mean is calculated based on the voltage data of the target static section to determine the average voltage of each single battery group at each target time point in the target static section; the target total voltage of each single battery group at each target time point in the target static section is determined based on the voltage data of the target static section; the voltage parameters of each single battery group at each target time point are determined based on the target total voltage of each single battery group at each target time point and the average voltage of each single battery group.

[0124] Optionally, the processing module 20 is further used for:

[0125] Determine the target total voltage of each single battery group and the average voltage of each single battery group at each target time point according to the voltage parameters of each single battery group at each target time point; calculate the difference between the first single battery group and the second single battery group at each target time point according to the target total voltage of each single battery group at each target time point, and determine the overall pressure difference at each target time point; determine the single battery voltage analysis result of the target vehicle according to the overall pressure difference at each target time point, the average voltage of each single battery group and the target total voltage of each single battery group.

[0126] Optionally, the processing module 20 is further used for:

[0127] The difference between the first single cell group and the second single cell group at each target time point is calculated based on the extreme voltage of each single cell group at each target time point, and the first voltage difference at each target time point is determined; when the first voltage difference at each target time point is greater than or equal to the first voltage threshold, the average voltage of the first single cell group at each target time point is greater than the average voltage of the second single cell group, the target total voltage of the first single cell group at each target time point is greater than the target total voltage of the second single cell group, and the overall voltage difference at each target time point is greater than the second voltage threshold, it is determined that the single cell voltage analysis result of the target vehicle is that single cell voltage stratification exists.

[0128] Optionally, the processing module 20 is further used for:

[0129] The difference between the first single cell group and the second single cell group at each target time point is calculated according to the extreme voltage of each single cell group at each target time point, and the second voltage difference at each target time point is determined; when the second voltage difference at each target time point is greater than or equal to the first voltage threshold, the average voltage of the first single cell group at each target time point is less than the average voltage of the second single cell group, the target total voltage of the first single cell group at each target time point is less than the target total voltage of the second single cell group, and the overall voltage difference at each target time point is greater than the third voltage threshold, it is determined that the single cell voltage analysis result of the target vehicle is that single cell voltage stratification exists.

[0130] The voltage warning device provided by the present application adopts the voltage warning method in the above embodiment, which can solve the technical problem that the prior art cannot deeply analyze the performance of the single cell battery, resulting in a high error rate when performing single cell voltage warning. Compared with the prior art, the beneficial effects of the voltage warning device provided by the present application are the same as the beneficial effects of the voltage warning method provided by the above embodiment, and the other technical features of the voltage warning device are the same as the features disclosed in the above embodiment method, which will not be repeated here.

[0131] The present application provides a voltage warning device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the voltage warning method in the above-mentioned embodiment one.

[0132] Reference below Figure 4 , which shows a schematic diagram of the structure of a voltage early warning device suitable for implementing the embodiment of the present application. The voltage early warning device in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 4 The voltage warning device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0133] like Figure 4As shown, the voltage warning device may include a processing device 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the voltage warning device are also stored. The processing device 1001, ROM1002, and RAM1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the voltage warning device to communicate with other devices wirelessly or by wire to exchange data. Although the figure shows a voltage warning device with various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems can be implemented or provided instead.

[0134] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0135] The voltage warning device provided by the present application adopts the voltage warning method in the above embodiment, which can solve the technical problem that the prior art cannot deeply analyze the performance of the single cell battery, resulting in a high error rate when performing single cell voltage warning. Compared with the prior art, the beneficial effects of the voltage warning device provided by the present application are the same as the beneficial effects of the voltage warning method provided by the above embodiment, and the other technical features of the voltage warning device are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0136] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0137] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0138] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, and the computer-readable program instructions are used to execute the voltage early warning method in the above-mentioned embodiment.

[0139] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0140] The computer-readable storage medium may be included in the voltage warning device; or may exist independently without being assembled into the voltage warning device.

[0141] The computer-readable storage medium carries one or more programs. When the one or more programs are executed by the voltage warning device, the voltage warning device: intercepts data of the single cell voltage list of the target vehicle at multiple time points according to the vehicle key information of the target vehicle to obtain the voltage data of the target static section; determines the voltage parameters of each single cell group at each target time point within the target static section according to the voltage data of the target static section; compares the voltage parameters of each single cell group at each target time point and / or compares the voltage parameters of each single cell group at each target time point with the target parameter range to determine the single cell voltage analysis result of the target vehicle; and issues a voltage warning based on the single cell voltage analysis result.

[0142] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0143] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0144] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0145] The readable storage medium provided by the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned voltage early warning method, and can solve the technical problem that the prior art cannot deeply analyze the performance of the single cell battery, resulting in a high error rate when performing single cell voltage early warning. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided by the present application are the same as the beneficial effects of the voltage early warning method provided by the above-mentioned embodiment, and will not be repeated here.

[0146] The present application also provides a computer program product, including a computer program, which implements the steps of the voltage early warning method as described above when executed by a processor.

[0147] The computer program product provided by the present application can solve the technical problem that the prior art cannot deeply analyze the performance of a single cell, resulting in a high error rate when performing a single cell voltage warning. Compared with the prior art, the beneficial effects of the computer program product provided by the present application are the same as the beneficial effects of the voltage warning method provided by the above embodiment, and will not be elaborated here.

[0148] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A voltage early warning method, characterized in that: The voltage early warning method comprises: According to the key vehicle information of the target vehicle, data of the single battery voltage list of the target vehicle at multiple time points is intercepted to obtain voltage data of the target static section; Determining voltage parameters of each single battery group at each target time point within the target static section according to the voltage data of the target static section; Comparing the voltage parameters of each single battery group at each target time point and / or comparing the voltage parameters of each single battery group at each target time point with the target parameter range to determine the single battery voltage analysis result of the target vehicle; A voltage warning is performed based on the monomer voltage analysis result.

2. The method according to claim 1, characterized in that Before the step of intercepting data of the single cell voltage list of the target vehicle at multiple time points according to the vehicle key information of the target vehicle to obtain the voltage data of the target static section, the step further includes: Obtaining a list of initial voltages of a target vehicle at multiple time points and key vehicle information of the target vehicle stored in the cloud; Determine a vehicle identification code according to the vehicle key information; Determine the actual number of battery cells of the target vehicle according to the vehicle identification code; The initial voltage list at each time point is processed according to the actual number of battery cells and the target voltage range to obtain a single cell voltage list of the target vehicle at multiple time points.

3. The method according to claim 1, characterized in that The step of intercepting data of a single cell voltage list of the target vehicle at multiple time points according to the key vehicle information of the target vehicle to obtain voltage data of the target static section includes: Determine the single cell battery current information and the vehicle driving speed of the target vehicle at each time point according to the key vehicle information of the target vehicle; Determine the target static section according to the single battery current information at each time point and the vehicle driving speed at each time point; According to the target static section, data of a single cell voltage list of the target vehicle at each time point is intercepted to determine voltage data of the target static section.

4. The method according to claim 1, characterized in that The step of determining the voltage parameters of each single battery group at each target time point in the target static section according to the voltage data of the target static section comprises: Perform voltage mean calculation based on the voltage data of the target static section to determine the average voltage of each single battery group at each target time point in the target static section; Determining the target total voltage of each single battery group at each target time point in the target static section according to the voltage data of the target static section; The voltage parameters of each single battery group at each target time point are determined according to the target total voltage of each single battery group at each target time point and the average voltage of each single battery group.

5. The method according to claim 1, characterized in that The step of comparing the voltage parameters of each single battery group at each target time point to determine the single battery voltage analysis result of the target vehicle includes: Determine the target total voltage of each single battery group and the average voltage of each single battery group at each target time point according to the voltage parameters of each single battery group at each target time point; Calculate the difference between the first single battery group and the second single battery group at each target time point according to the target total voltage of each single battery group at each target time point, and determine the overall voltage difference at each target time point; The single cell voltage analysis result of the target vehicle is determined according to the overall voltage difference at each target time point, the average voltage of each single cell group and the target total voltage of each single cell group.

6. The method according to claim 5, characterized in that The step of determining the single cell voltage analysis result of the target vehicle according to the overall voltage difference at each target time point, the average voltage of each single cell group and the target total voltage of each single cell group comprises: Calculate the difference between the first single battery group and the second single battery group at each target time point according to the extreme voltage of each single battery group at each target time point, and determine the first voltage difference at each target time point; When the first voltage difference at each target time point is greater than or equal to the first voltage threshold, the average voltage of the first single battery group at each target time point is greater than the average voltage of the second single battery group, the target total voltage of the first single battery group at each target time point is greater than the target total voltage of the second single battery group, and the overall voltage difference at each target time point is greater than the second voltage threshold, it is determined that the single battery voltage analysis result of the target vehicle is that single battery voltage stratification exists.

7. The method according to claim 5, characterized in that The step of determining the single cell voltage analysis result of the target vehicle according to the overall voltage difference at each target time point, the average voltage of each single cell group and the target total voltage of each single cell group comprises: Calculate the difference between the first single battery group and the second single battery group at each target time point according to the extreme voltage of each single battery group at each target time point, and determine the second voltage difference at each target time point; When the second voltage difference at each target time point is greater than or equal to the first voltage threshold, the average voltage of the first single battery group at each target time point is less than the average voltage of the second single battery group, the target total voltage of the first single battery group at each target time point is less than the target total voltage of the second single battery group, and the overall voltage difference at each target time point is greater than the third voltage threshold, it is determined that the single battery voltage analysis result of the target vehicle is that single battery voltage stratification exists.

8. A voltage early warning device, characterized in that: The voltage early warning device comprises: An interception module is used to intercept data of a single battery voltage list of the target vehicle at multiple time points according to the key vehicle information of the target vehicle, so as to obtain voltage data of the target static section; A processing module, configured to determine voltage parameters of each single battery pack at each target time point within the target resting section according to the voltage data of the target resting section; The processing module is further used to compare the voltage parameters of each single battery group at each target time point and / or compare the voltage parameters of each single battery group at each target time point with the target parameter range to determine the single battery voltage analysis result of the target vehicle; The early warning module is used for performing voltage early warning based on the single cell voltage analysis result.

9. A voltage early warning device, characterized in that: The voltage warning device comprises: a memory, a processor, and a voltage warning program stored in the memory and executable on the processor, wherein the voltage warning program is configured to implement the voltage warning method according to any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium stores a voltage warning program, and when the voltage warning program is executed by the processor, the voltage warning method according to any one of claims 1 to 7 is implemented.

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