Voltage early warning method, device, equipment and storage medium

Abstract

The application discloses a voltage early warning method and device, equipment and storage medium, and relates to the technical field of batteries. The method comprises the following steps: data interception is performed on single battery voltage lists at multiple time points according to vehicle key information of a target vehicle, so that voltage data of a target static section is obtained; voltage parameters of each single battery group at each target time point in the target static section are determined according to the voltage data; voltage analysis is performed according to the voltage parameters of each single battery group at each target time point, so that a single voltage analysis result is determined; and voltage early warning is performed based on the analysis result. In the foregoing manner, the problems of false reporting, missing reporting and the inability to deeply analyze and predict the performance of single batteries in the prior art are solved, accurate monitoring and deep analysis of the voltage of single batteries of an electric vehicle are realized, the accuracy of early warning is ensured while hierarchical early warning is realized, and the safety and reliability of the electric vehicle are improved.

Description

TECHNICAL FIELD

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

[0002] With the increasing concern about environmental protection and energy crisis, electric vehicles (EV) as a representative of new energy vehicles have become an important choice for future transportation. The core component of electric vehicles, power battery, its safety and reliability are directly related to the performance of the whole vehicle and the safety of users. However, the power battery system is composed of multiple single batteries, and the performance and state of each single battery may be different, which may cause safety problems such as battery thermal runaway, overcharge, overdischarge, etc. during the use of electric vehicles.

[0003] The traditional power battery fault early warning method mainly relies on real-time data monitoring of the battery management system (BMS), but these methods can only make simple threshold judgment on single batteries, and cannot make deep analysis and prediction on battery performance. At the same time, due to the complex and changeable running environment of electric vehicles, the traditional early warning method often has the problems of false alarm and missed alarm. SUMMARY

[0004] The main purpose of the present application is to provide a voltage early warning method, device, equipment and storage medium, which aims to solve the technical problem that the performance of single battery cannot be deeply analyzed in the prior art, resulting in high error rate when early warning the single voltage.

[0005] To achieve the above purpose, the present application provides a voltage early warning method, which comprises:

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

[0007] According to the voltage data of the target static section, the voltage parameters of each single battery group at each target time point in the target static section are determined;

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

[0009] Based on the single voltage analysis result, voltage early warning is carried out.

[0010] In an embodiment, before the step of data intercepting 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 method further comprises:

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

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

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

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

[0015] In an embodiment, the step of data intercepting 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 comprises:

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

[0017] 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;

[0018] data intercepting the single battery voltage list of the target vehicle at each time point according to the target static section to determine the voltage data of the target static section.

[0019] In an embodiment, the step of determining the voltage parameter 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:

[0020] determining the average 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;

[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] determining the voltage parameter 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.

[0023] In an embodiment, the step of determining the single-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 pack, and the target total voltage of each single battery pack comprises:

[0024] determining the target total voltage of each single battery pack and the average voltage of each single battery pack at each target time point according to the voltage parameter of each single battery pack at each target time point;

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

[0026] determining the single-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 pack, and the target total voltage of each single battery pack.

[0027] In an embodiment, the step of determining the single-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 pack, and the target total voltage of each single battery pack comprises:

[0028] calculating the first voltage difference at each target time point according to the extreme voltage of each single battery pack at each target time point, and determining the difference between the first single battery pack and the second single battery pack 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 pack at each target time point is greater than the average voltage of the second single battery pack, the target total voltage of the first single battery pack at each target time point is greater than the target total voltage of the second single battery pack, and the overall voltage difference at each target time point is greater than the second voltage threshold, determining that the single-voltage analysis result of the target vehicle is that there is single-voltage stratification.

[0030] In an embodiment, the step of determining the single-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 pack, and the target total voltage of each single battery pack comprises:

[0031] calculating the second voltage difference at each target time point according to the extreme voltage of each single battery pack at each target time point, and determining the difference between the first single battery pack and the second single battery pack at each target time point;

[0032] 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.

[0033] In addition, to achieve the above object, the present application further provides a voltage early warning device, which comprises:

[0034] The intercepting module is configured to intercept 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 voltage data of a target static section;

[0035] The processing module is configured to determine 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.

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

[0037] The early warning module is configured to perform voltage early warning based on the single voltage analysis result.

[0038] In addition, to achieve the above object, the present application further provides a voltage early warning device, which comprises a memory, a processor and a computer program stored in the memory and executable on the processor, and the computer program is configured to implement the steps of the voltage early warning method as described above.

[0039] In addition, to achieve the above object, the present application further provides a storage medium, which is a computer readable storage medium, and the storage medium stores a computer program, and the computer program is executed by a processor to implement the steps of the voltage early warning method as described above.

[0040] In addition, to achieve the above object, the present application further provides a computer program product, which comprises a computer program, and the computer program is executed by a processor to implement the steps of the voltage early warning method as described above.

[0041] The application obtains voltage data of a target static section by data intercepting a single battery voltage list of a target vehicle at multiple time points according to vehicle key information of the target vehicle; determines 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; respectively compares the voltage parameters of each single battery group at each target time point and / or compares the voltage parameters of each single battery group at each target time point with a target parameter range to determine a single voltage analysis result of the target vehicle; and performs voltage early warning based on the single voltage analysis result. In this way, the voltage parameters of each single battery group at each target 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 battery group at each target time point, and voltage early warning is performed based on the analysis result, thereby solving the problems of false positives, false negatives, and inability to deeply analyze and predict the performance of single batteries in the prior art, achieving accurate monitoring and deep analysis of the voltage of single batteries of an electric vehicle, ensuring the accuracy of early warning while achieving hierarchical early warning, and improving the safety and reliability of the electric vehicle. BRIEF DESCRIPTION OF DRAWINGS

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

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the application or in the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

[0044] Figure 1 A flowchart provided for the first voltage early warning method embodiment of the application;

[0045] Figure 2 A flowchart provided for the second voltage early warning method embodiment of the application;

[0046] Figure 3 A module structure diagram of the voltage early warning device in the embodiment of the application;

[0047] Figure 4 A device structure diagram of a hardware running environment involved in the voltage early warning method in the embodiment of the application.

[0048] The object implementation, functional features and advantages of the application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

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

[0050] In order to better understand the technical solutions of the present application, the following will be described in detail in combination with the drawings of the specification and specific embodiments.

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

[0052] With increasing global attention to environmental protection and energy crisis, electric vehicles (EV) as a representative of new energy vehicles have become an important choice for future transportation. The safety and reliability of the power battery, the core component of electric vehicles, are directly related to the performance of the whole vehicle and the safety of users. However, the power battery system is composed of multiple single batteries, and the performance and state of each single battery may differ, which may cause safety problems such as battery thermal runaway, overcharging, overdischarging, etc. during the use of electric vehicles.

[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 make simple threshold judgments on single batteries and cannot perform in-depth analysis and prediction on battery performance. At the same time, due to the complex and variable operating environment of electric vehicles, traditional warning methods often have false positives and false negatives.

[0054] The present application provides a solution by determining the voltage parameters of each single battery group at each time point based on the voltage data of the target static section, performing voltage analysis based on the voltage parameters of each single battery group at each target time point, and performing voltage warning based on the analysis result, which solves the problems of false positives, false negatives and inability to perform in-depth analysis and prediction of single battery performance in the prior art, realizes accurate monitoring and in-depth analysis of the voltage of single batteries of electric vehicles, ensures the accuracy of the warning while realizing layered warning, and improves the safety and reliability of electric vehicles.

[0055] It should be noted that the execution subject of the 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. The following takes the voltage early warning device as an example to illustrate the embodiment and the following embodiments.

[0056] Based on this, the application embodiment provides a voltage early warning method, which refers to Figure 1 , Figure 1 The flowchart of the first embodiment of the voltage early warning method of the application is shown in the figure.

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

[0058] Step S10, according to the vehicle key information of the target vehicle, data is intercepted from the single battery voltage list of the target vehicle at multiple time points to obtain the voltage data of the target static section.

[0059] It should be noted that each time point corresponds to a single battery voltage list, and each single battery voltage list contains the voltage value corresponding to each single battery. At the same time, the voltage values contained in the single battery voltage list are within the target voltage range. In the embodiment, the target voltage range can be set to (0, 4.8V). The vehicle key information includes but is not limited to the vehicle identification code (Vehicle Identification Number, VIN), the driving speed corresponding to each time point, the maximum voltage, the minimum voltage, the current and the charging and discharging state, etc.

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

[0061] In a feasible implementation, before step S10, steps A11-A14 can be included:

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

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

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

[0065] Step A13, determining the actual number of electric cores 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 electric cores and the target voltage range to obtain the single battery 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, the actual number of electric cores of the target vehicle is obtained by searching the static information table, the initial voltage list at each time point is cleaned by the actual number of electric cores, the voltage list of the correct number of electric cores is obtained, the maximum voltage and the minimum voltage are obtained through the voltage list, the voltage values not in the target voltage range are eliminated, the maximum voltage and the minimum voltage are limited in the target voltage range, and thus the single battery voltage list of the target vehicle at multiple time points is obtained.

[0068] In a feasible implementation, step S10 can include steps B11-B13:

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

[0070] It should be noted that the vehicle key information of the target vehicle includes the charging and discharging 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 charging and discharging 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 the time period corresponding to the current in the preset current range and without the driving speed is determined based on the single battery current information at each time point and the vehicle driving speed at each time point, and the time period is taken as the target static period.

[0073] Step B13, according to the target static period, data interception is performed on the single battery voltage list of the target vehicle at each time point, and the voltage data of the target static period is determined.

[0074] It should be noted that the single battery voltage list corresponding to the target static period is obtained by screening the single battery voltage list at each time point based on the target static period.

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

[0076] It should be noted that since there are multiple single batteries in the target vehicle, in order to facilitate management, the multiple single batteries are grouped and controlled to obtain multiple single battery groups. In this embodiment, there are two single battery groups, which are the first single battery group and the second single battery group. The single battery group can also be called a slave module. For example, there are 96 single batteries, and slave module 1 and slave module 2 each contain 48 single batteries.

[0077] It can be understood 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 static period.

[0078] In a feasible implementation, step S20 can include steps C11-C13:

[0079] Step C11, according to the voltage data of the target static period, the average voltage of each single battery group at each target time point in the target static period is determined by voltage mean value calculation.

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

[0081] Step C13, 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, the voltage parameters of each single battery group at each target time point are determined.

[0082] It should be noted that the voltage average and the voltage sum are calculated based on the voltage data of the target static section respectively, to determine the average voltage volt avg and the target total voltage volt sum corresponding to each single battery group at each target time point, so as to obtain the voltage parameters of each single battery group at each target time point.

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

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

[0085] In step S40, the voltage warning is performed based on the single voltage analysis result.

[0086] It should be noted that when the single voltage analysis result is the existence of the voltage abnormal situation, the voltage warning is performed based on the specific type contained in the single voltage analysis result, the customer and the after-sales quality are notified for maintenance through short message or email, and the user experience is improved.

[0087] The embodiment obtains voltage data of a target static section by data interception on a single battery voltage list of a target vehicle at multiple time points according to vehicle key information of the target vehicle, determines 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, respectively compares the voltage parameters of each single battery group at each target time point and / or compares the voltage parameters of each single battery group at each target time point with a target parameter range, determines a single voltage analysis result of the target vehicle, and performs voltage early warning based on the single voltage analysis result. In this way, the voltage parameters of each single battery 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 battery group at each target time point, and voltage early warning is performed based on the analysis result, thereby solving the problems of false reporting, missing reporting and inability to deeply analyze and predict the performance of single batteries in the prior art, realizing accurate monitoring and deep analysis of the voltage of single batteries of an electric vehicle, ensuring the accuracy of early warning while realizing hierarchical early warning, and improving the safety and reliability of the electric vehicle.

[0088] Based on the first embodiment of the present application, the same or similar contents as the above embodiment one can be referred to the above introduction, and will not be described in detail hereinafter. On this basis, please refer to Figure 2 , the step S30 in the voltage early warning method further includes steps S31-S33.

[0089] In step S31, the target total voltage of each single battery group at each target time point and the average voltage of each single battery group are determined according to the voltage parameters of each single battery group at each target time point.

[0090] In step S32, the difference between the first single battery group and the second single battery group at each target time point is calculated according to the target total voltage of each single battery group at each target time point, and the overall pressure difference at each target time point is determined.

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

[0092] In step S33, the single voltage analysis result of the target vehicle is determined 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.

[0093] It should be noted that for each target time point: the average voltage of the first monomer battery group and the target total voltage are compared with the average voltage of the second monomer battery group and the target total voltage respectively, and the overall pressure difference is compared with the set pressure difference threshold, and whether there is a monomer voltage stratification between the monomer battery groups is determined based on the comparison result, so as to obtain the monomer voltage analysis result.

[0094] In a feasible implementation, step S33 can include steps D11-D12:

[0095] Step D11, according to the extreme value voltage of each monomer battery group at each target time point, the difference between the first monomer battery group and the second monomer battery group at each target time point is calculated, and the first voltage difference at each target time point is determined.

[0096] It should be noted that for each target time point: the extreme value voltage of each monomer battery group refers to the highest voltage and the lowest voltage of each monomer battery group. The first voltage difference volt_min1-volt_max2 is obtained by subtracting the highest voltage value of the second monomer battery group from the lowest voltage value of the first monomer 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 monomer battery group at each target time point is greater than the average voltage of the second monomer battery group, the target total voltage of the first monomer battery group at each target time point is greater than the target total voltage of the second monomer battery group, and the overall pressure difference at each target time point is greater than the second voltage threshold, it is determined that the monomer voltage analysis result of the target vehicle is that there is a monomer voltage stratification.

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

[0099] In one possible implementation, step S33 can include steps E11-E12.

[0100] Step E11, the difference between the first monomer battery group and the second monomer battery group at each target time point is determined according to the extreme value voltage of each monomer battery group at each target time point, to obtain the second voltage difference at each target time point.

[0101] It should be noted that for each target time point: the second voltage difference volt_min2-volt_min1 is obtained by subtracting the minimum voltage value of the first monomer battery group from the minimum voltage value of the second monomer battery group.

[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 monomer battery group at each target time point is less than the average voltage of the second monomer battery group, the target total voltage of the first monomer battery group at each target time point is less than the target total voltage of the second monomer battery group, and the overall voltage difference at each target time point is greater than the third voltage threshold, it is determined that the monomer voltage analysis result of the target vehicle is that there is monomer voltage stratification.

[0103] It should be noted that for all target time points, when all the following conditions are met, it means that there is monomer voltage stratification between the first monomer battery group and the second battery group, and the monomer voltage analysis result is that there is monomer voltage stratification: the second voltage difference is greater than or equal to the first voltage threshold, the average voltage of the first monomer battery group is less than the average voltage of the second monomer battery group, the target total voltage of the first monomer battery group is less than the target total voltage of the second monomer battery group, and the overall voltage difference is greater than the third voltage threshold. In this embodiment, the first voltage threshold is a set extreme difference threshold, which can be set to 7mV, and can also be adjusted according to specific needs; the third voltage threshold is a set overall voltage difference threshold, which can be set to 60mV, and can also be adjusted according to specific needs, i.e., volt_avg1

[0104] The embodiment determines the target total voltage of each single battery pack and the average voltage of each single battery pack at each target time point according to the voltage parameters of each single battery pack at each target time point; calculates the difference between the first single battery pack and the second single battery pack at each target time point according to the target total voltage of each single battery pack at each target time point, and determines the overall pressure difference at each target time point; and determines the single 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 pack, and the target total voltage of each single battery pack. In this way, the problem of single voltage stratification of the battery in the vehicle can be effectively identified.

[0105] For example, to facilitate understanding of the implementation process of the voltage early warning method obtained after the above-mentioned embodiment one, specifically:

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

[0107] Step 2: data cleaning, by checking the static information table, the actual number of electric cores of each vehicle is obtained, the voltage list is divided by the number of electric cores to obtain the voltage list of the correct number of electric cores, and the highest voltage and the lowest voltage are obtained through the voltage list; the highest voltage and the lowest voltage value are limited in 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 the slave control module 1 and the average voltage of the slave control module 2, and calculate the total voltage of the slave control module 1 and the slave control module 2;

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

[0110] Step 5: According to the results of the early warning, the customer and after-sales quality are notified by SMS or email to carry out maintenance, improve user experience, and after market investigation and verification, the algorithm accuracy is 97%, which can effectively identify the single cell voltage stratification problem existing in the battery of the electric vehicle.

[0111] The mode of the embodiment has the following advantages: improving the accuracy of early warning: through big data analysis technology, the change rule and characteristic information of single cell voltage can be deeply mined, and the accuracy of early warning can be improved. Reducing false alarm rate: the false alarm rate can be reduced, and unnecessary user distress can be reduced. Improving the timeliness of early warning: cloud platform monitoring data can realize timely monitoring and early warning of single cell voltage, and potential safety problems can be found and handled in time. Enhancing system reliability: by adjusting the charging strategy, limiting the driving speed of the vehicle, etc., the probability of occurrence of battery thermal runaway and other safety problems can be reduced, and the reliability of the electric vehicle system can be improved. Facilitating user maintenance: the early warning information is timely notified to the user through the cloud platform, and the user can perform corresponding maintenance and repair according to the early warning information, and the user experience is improved.

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

[0113] The present application also provides a voltage warning device, which refers to Figure 3 , the voltage warning device comprises:

[0114] The intercepting module 10 is configured to intercept 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, so as to obtain voltage data of a target static section.

[0115] The processing module 20 is configured to determine 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.

[0116] The processing module 20 is further configured to respectively 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 a target parameter range, so as to determine a single voltage analysis result of the target vehicle.

[0117] The warning module 30 is configured to perform voltage warning based on the single voltage analysis result.

[0118] Optionally, the intercepting module 10 is further configured to:

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

[0120] Optionally, the intercepting module 10 is further configured to:

[0121] Determine single battery current information of the target vehicle at each time point and vehicle driving speed at each time point according to the vehicle key information of the target vehicle; determine a target static section according to the single battery current information at each time point and the vehicle driving speed at each time point; and intercept data of the single battery voltage list of the target vehicle at each time point according to the target static section, so as to determine voltage data of the target static section.

[0122] Optionally, the processing module 20 is further configured to:

[0123] The voltage data of the target static section is used to calculate the average voltage of each single battery group at each target time point, and the target total voltage of each single battery group at each target time point is determined according to the voltage data of the target static section; and the voltage parameter of each single battery group at each target time point is 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.

[0124] Optionally, the processing module 20 is further configured to:

[0125] The target total voltage of each single battery group at each target time point and the average voltage of each single battery group are determined according to the voltage parameter of each single battery group at each target time point; the difference between the first single battery group and the second single battery group at each target time point is calculated according to the target total voltage of each single battery group at each target time point, and the overall voltage difference at each target time point is determined; and the single 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 battery group, and the target total voltage of each single battery group.

[0126] Optionally, the processing module 20 is further configured to:

[0127] The first voltage difference at each target time point is determined according to the extreme voltage of each single battery group 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, the single voltage analysis result of the target vehicle is determined to be single voltage stratification.

[0128] Optionally, the processing module 20 is further configured to:

[0129] The second voltage difference at each target time point is determined according to the extreme voltage of each single battery group 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, the single voltage analysis result of the target vehicle is determined to be single voltage stratification.

[0130] The voltage early warning device provided by the present application adopts the voltage early warning method in the above embodiment, and can solve the technical problem that the performance of the single battery cannot be deeply analyzed in the prior art, resulting in a high error rate when the single voltage is early warned. Compared with the prior art, the voltage early warning device provided by the present application has the same beneficial effects as the voltage early warning method provided by the above embodiment, and other technical features in the voltage early 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 early warning device, which comprises at least one processor and a memory connected with the at least one processor in communication; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the voltage early warning method in the above embodiment one.

[0132] Reference will be made to the following description of the drawings Figure 4 , which shows a structural schematic diagram of a voltage early warning device suitable for implementing the embodiments of the present application. The voltage early warning device in the embodiments of the present application can include but is not limited to mobile terminals such as mobile phones, notebook computers, digital broadcast receivers, PDAs (Personal Digital Assistant), PADs (Portable Application Description), PMPs (Portable Media Player), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), and the like, and fixed terminals such as digital TVs, desktop computers, and the like. Figure 4 The voltage early warning device shown is only an example, and should not bring any limitation to the functions and use range of the embodiments of the present application.

[0133] As Figure 4As shown, the voltage warning device can include a processing device 1001 (e.g., a central processing unit, a graphics processing unit, etc.) that can perform various appropriate actions and processes according to programs stored in a read-only memory (ROM) 1002 or loaded from a storage device 1003 into a random access memory (RAM) 1004. Various programs and data required for operation of the voltage warning device are also stored in the RAM 1004. The processing device 1001, the ROM 1002, and the RAM 1004 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: input devices 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; the 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 voltage warning device with various systems is shown in the figure, it should be understood that all the shown systems are not required to be implemented or possessed. More or fewer systems can be alternatively implemented or possessed.

[0134] In particular, the processes described above with reference to the flowcharts can be implemented as a computer software program according to embodiments of the present disclosure. For example, embodiments of the present disclosure include a computer program product comprising a computer program carried on a computer readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network by a communication device, or installed from the storage device 1003, or installed from the ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the methods of embodiments of the present disclosure are performed.

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

[0136] It should be understood that various aspects of the disclosure can be implemented in 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 appropriate manner in any one or more embodiments or examples.

[0137] The above description is merely illustrative of the application and is not intended to limit the scope of the application. Any variations and modifications that can be made by any person skilled in the art within the spirit and scope of the application are intended to be encompassed by the application. Therefore, the scope of the application should be determined by the appended claims.

[0138] The application provides a computer readable storage medium having computer readable program instructions (i.e., computer programs) stored thereon, the computer readable program instructions being used to execute the voltage warning method in the above-described embodiments.

[0139] The computer readable storage medium provided by the application may, for example, be a U disk, but is not limited to an electric, magnetic, optical, electromagnetic, infrared, or semiconductor system, system, or device, or any combination of the above. More specific examples of the computer readable storage medium can include, but are not limited to, an electric connection having one or more conductive 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 appropriate combination of the above. In the present embodiment, the computer readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer readable storage medium can be transmitted by any appropriate medium, including but not limited to an electric wire, an optical cable, an RF (Radio Frequency), etc., or any appropriate combination of the above.

[0140] The above computer readable storage medium can be included in the voltage warning device; or can exist separately and not be assembled into the voltage warning device.

[0141] The computer readable storage medium described above carries one or more programs, when the one or more programs are executed by the voltage early warning device, the voltage early warning device is caused to: according to vehicle key information of a target vehicle, data is intercepted from a single battery voltage list of the target vehicle at a plurality of time points, and voltage data of a target static section is obtained; according to the voltage data of the target static section, voltage parameters of each single battery group at each target time point in the target static section are determined; the voltage parameters of each single battery group at each target time point are compared respectively and / or the voltage parameters of each single battery group at each target time point are compared respectively with a target parameter range, and a single voltage analysis result of the target vehicle is determined; and voltage early warning is performed based on the single voltage analysis result.

[0142] Computer program code for carrying out operations of the present application can be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer can 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 the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider).

[0143] The flow and block diagrams in the drawings show architectural, functional, and operational representations of possible implementations of systems, methods, and computer program products according to various embodiments of the present application. In this regard, each block in the flow and block diagrams can represent a module, a segment, or a portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the blocks can occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently or the blocks may

[0144] The modules described in the embodiments of the present application can be implemented in the form of software or in the form of hardware. In some cases, the name of the module does not constitute a limitation on the module itself.

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

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

[0147] The computer program product provided by the present application can solve the technical problem that the performance of the single battery cannot be deeply analyzed in the prior art, resulting in a high error rate when the single battery voltage is warned. Compared with the prior art, the computer program product provided by the present application has the same beneficial effects as the voltage warning method provided by the above-mentioned embodiments, and will not be described here.

[0148] The above only describes some embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation, direct / indirect application in other related technical fields based on the technical concept of the present application, and the content of the present application specification and drawings 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 includes: 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 pack 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 a target parameter range to determine a single battery voltage analysis result of the target vehicle; Perform voltage warning based on the monomer voltage analysis result; The step of comparing the voltage parameters of each single battery pack at each target time point to determine the single battery voltage analysis result of the target vehicle includes: 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; Calculating the difference between the first single battery group and the second single battery group at each target time point based on the target total voltage of each single battery group at each target time point to determine the overall voltage difference at each target time point; The 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 cell group, and the target total voltage of each cell group.

2. The method according to claim 1, wherein Before the step of intercepting data from a list of single battery voltages of the target vehicle at multiple time points based on the key vehicle information of the target vehicle to obtain voltage data of the target static section, the method 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; Determining a vehicle identification code based on the vehicle key information; Determine the actual number of battery cells in 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, wherein The step of intercepting data from a single battery 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: Determining the single battery current information and the vehicle speed of the target vehicle at each time point according to the key vehicle information of the target vehicle; Determine the target static section based on the single battery current information at each time point and the vehicle driving speed at each time point; Data is intercepted from a list of single cell voltages of the target vehicle at various time points according to the target rest period to determine voltage data of the target rest period.

4. The method according to claim 1, wherein The step of determining the voltage parameters of each single battery pack at each target time point within the target static section according to the voltage data of the target static section includes: Performing voltage mean calculation based on the voltage data of the target static period to determine the average voltage of each single battery group at each target time point within the target static period; Determining a target total voltage of each single battery pack at each target time point within the target rest period according to the voltage data of the target rest period; 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, wherein 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: Calculating the difference between the first single cell group and the second single cell group at each target time point based on the extreme voltage of each single cell group at each target time point, and determining a 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.

6. The method according to claim 1, wherein 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: Calculating the difference between the first single battery group and the second single battery group at each target time point based on the extreme voltage of each single battery group at each target time point, and determining a 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.

7. 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 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 rest period according to the voltage data of the target rest period; The processing module is further configured to perform parameter comparison on the voltage parameters of each single battery pack at each target time point and / or compare the voltage parameters of each single battery pack at each target time point with a target parameter range to determine a single battery voltage analysis result of the target vehicle; An early warning module, configured to issue a voltage early warning based on the cell voltage analysis result; The processing module is further used to determine the target total voltage of each single battery group and the average voltage of each single battery group at each target time point based on 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 based on the target total voltage of each single battery group at each target time point to determine the overall voltage difference at each target time point; and determine the single battery voltage analysis result of the target vehicle based on 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.

8. A voltage early warning device, characterized in that: The voltage warning device includes: 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 6.

9. A storage medium, characterized in that: The storage medium stores a voltage warning program, which, when executed by the processor, implements the voltage warning method according to any one of claims 1 to 6.

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