Vehicle thermal runaway warning method, device, electronic device and readable storage medium

Abstract

The present application discloses a vehicle thermal runaway warning method, device, electronic device and readable storage medium, which are applied to the field of electric vehicle technology. The vehicle thermal runaway warning method includes: obtaining the vehicle's operating data, wherein the operating data is multiple single-cell voltage data of the battery pack in the vehicle; dividing the multiple single-cell voltage data into time windows according to the acquisition sequence of the operating data, and extracting single-cell voltage characteristics from the partial single-cell voltage data corresponding to each time window obtained by the division; when each single-cell voltage characteristic meets the preset voltage warning condition, it is determined that the vehicle has a thermal runaway risk, and the vehicle is controlled to output thermal runaway warning information. The present application solves the technical problem that the risk of thermal runaway in vehicles is high.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicles, and in particular to a vehicle thermal runaway warning method, device, electronic device and readable storage medium. Background Art

[0002] With the rapid development of electric vehicles, lithium batteries are widely used in electric vehicles due to their high voltage, high specific energy and long cycle life. When an electric vehicle fails, a large amount of heat energy will be released inside the battery, which is the thermal runaway phenomenon of the electric vehicle. Excessive heat energy may cause a fire or even an explosion in the vehicle. Therefore, it is particularly important to detect the risk of thermal runaway in electric vehicles and issue early warnings to prompt users to replace the battery pack to avoid thermal runaway.

[0003] At present, the method for detecting thermal runaway risk is usually to obtain parameters such as battery body temperature, voltage, current and discharge rate for thermal runaway risk detection. However, since thermal runaway phenomenon generally spreads from a single cell to the entire battery, detecting the risk of thermal runaway of the vehicle only based on the overall parameters of the battery will make the timeliness of thermal runaway risk warning low, thus preventing users from replacing the battery in time, and the risk of thermal runaway in the vehicle remains high. Summary of the invention

[0004] The main purpose of the present application is to provide a vehicle thermal runaway warning method, device, electronic device and readable storage medium, aiming to solve the technical problem of high risk of thermal runaway in vehicles in the prior art.

[0005] To achieve the above objectives, the present application provides a vehicle thermal runaway warning method, which is applied to a vehicle thermal runaway warning device. The vehicle thermal runaway warning method includes:

[0006] Acquiring operation data of a vehicle, wherein the operation data is voltage data of multiple cells of a battery pack in the vehicle;

[0007] Divide the plurality of said monomer voltage data into time windows according to the collection timing of said operation data, and extract monomer voltage features from the partial monomer voltage data corresponding to each divided time window;

[0008] When the voltage characteristics of each of the monomers meet the preset voltage warning conditions, it is determined that the vehicle has a thermal runaway risk, and the vehicle is controlled to output thermal runaway warning information.

[0009] Optionally, after the step of dividing the plurality of monomer voltage data into time windows according to the collection timing of the operation data, the method further includes:

[0010] Obtaining a voltage range of a battery pack in the vehicle;

[0011] Constructing a voltage interval corresponding to the vehicle operation data according to the voltage range and the preset voltage interval range, wherein the voltage interval at least includes a voltage sub-interval;

[0012] Part of the monomer voltage data corresponding to each of the time windows is divided into the voltage intervals.

[0013] Optionally, the cell voltage feature includes a first characteristic value and a second characteristic value, and the step of extracting the cell voltage feature from the partial cell voltage data corresponding to each divided time window includes:

[0014] Selecting a high voltage sub-interval and a corresponding low voltage sub-interval corresponding to the partial monomer voltage data in each of the voltage sub-intervals;

[0015] Determine a first voltage deviation value of the high voltage sub-interval and a second voltage deviation value of the low voltage sub-interval in the partial cell voltage data corresponding to each of the time windows;

[0016] A voltage deviation difference between the first voltage deviation value and the second voltage deviation value is used as the first characteristic value, and the second voltage deviation value is used as the second characteristic value.

[0017] Optionally, when the voltage characteristics of each cell meet the preset voltage warning condition, before the step of determining that the vehicle has a thermal runaway risk and controlling the vehicle to output thermal runaway warning information, the method further includes:

[0018] Determine whether the first eigenvalue is greater than a preset eigenvalue threshold and whether a first discrete degree of the first eigenvalue satisfies a preset first discrete degree, and determine whether a second discrete degree of the second eigenvalue satisfies a preset second discrete degree;

[0019] If the first characteristic value is greater than a preset characteristic threshold, the first discrete degree meets a preset first discrete degree, and the second discrete degree meets a preset second discrete degree, it is determined that the single cell voltage characteristic meets a preset voltage warning condition.

[0020] Optionally, the step of determining the first voltage deviation value of the high voltage sub-interval and the second voltage deviation value of the low voltage sub-interval in the partial cell voltage data corresponding to each of the time windows includes:

[0021] Acquire a first voltage mean difference of the high voltage sub-interval and a second voltage mean difference of the low voltage sub-interval in the partial cell voltage data corresponding to each of the time windows;

[0022] Acquire a first voltage deviation degree of the high voltage sub-interval and a second voltage deviation degree of the low voltage sub-interval;

[0023] A first voltage deviation value of the high voltage sub-interval is obtained according to a first product of the first voltage mean difference and the first voltage deviation degree, and a second voltage deviation value of the low voltage sub-interval is obtained according to a second product of the second voltage mean difference and the second voltage deviation degree.

[0024] Optionally, the step of obtaining the first voltage mean difference of the high voltage sub-interval and the second voltage mean difference of the low voltage sub-interval in the partial cell voltage data corresponding to each time window includes:

[0025] Part of the monomer voltage data corresponding to the first time window is used as the initial window data;

[0026] Acquire a first cell voltage value of the high voltage subinterval in the initial window data, a second cell voltage value of the high voltage subinterval in the partial cell voltage data corresponding to each time window, a third cell voltage value of the low voltage subinterval in the initial window data, and a fourth cell voltage value of the low voltage subinterval in the partial cell voltage data corresponding to each time window;

[0027] A first voltage difference between the first cell voltage value and the second cell voltage value is used as a first voltage mean difference of the high voltage sub-interval, and a second voltage difference between the third cell voltage value and the fourth cell voltage value is used as a second voltage mean difference of the low voltage sub-interval.

[0028] Optionally, the step of acquiring a first voltage deviation degree of the high voltage sub-interval and a second voltage deviation degree of the low voltage sub-interval includes:

[0029] Acquire a fifth cell voltage value of each cell voltage data in the high voltage sub-interval, a sixth cell voltage value of each cell voltage data in the low voltage sub-interval, and a voltage median corresponding to each cell voltage data;

[0030] A first voltage deviation degree of the high voltage sub-interval is obtained according to the fifth cell voltage value and the corresponding voltage median, and a second voltage deviation degree of the low voltage sub-interval is obtained according to the sixth cell voltage value and the corresponding voltage median.

[0031] To achieve the above-mentioned purpose, the present application also provides a vehicle thermal runaway warning device, which is applied to a vehicle thermal runaway warning device, and the vehicle thermal runaway warning device comprises:

[0032] An acquisition module, used for acquiring operation data of a vehicle, wherein the operation data is voltage data of multiple cells of a battery pack in the vehicle;

[0033] An extraction module, used to divide the plurality of said monomer voltage data into time windows according to the collection timing of said operation data, and extract the monomer voltage features from the partial monomer voltage data corresponding to each time window obtained by the division;

[0034] The control module is used to determine that the vehicle has a thermal runaway risk when the voltage characteristics of each of the monomers meet a preset voltage warning condition, and control the vehicle to output thermal runaway warning information.

[0035] Optionally, after the step of dividing the plurality of monomer voltage data into time windows according to the collection sequence of the operation data, the vehicle thermal runaway warning device is further used to:

[0036] Obtaining a voltage range of a battery pack in the vehicle;

[0037] Constructing a voltage interval corresponding to the vehicle operation data according to the voltage range and the preset voltage interval range, wherein the voltage interval at least includes a voltage sub-interval;

[0038] Part of the monomer voltage data corresponding to each of the time windows is divided into the voltage intervals.

[0039] Optionally, the cell voltage feature includes a first feature value and a second feature value, and the extraction module is further used to:

[0040] Selecting a high voltage sub-interval and a corresponding low voltage sub-interval corresponding to the partial monomer voltage data in each of the voltage sub-intervals;

[0041] Determine a first voltage deviation value of the high voltage sub-interval and a second voltage deviation value of the low voltage sub-interval in the partial cell voltage data corresponding to each of the time windows;

[0042] A voltage deviation difference between the first voltage deviation value and the second voltage deviation value is used as the first characteristic value, and the second voltage deviation value is used as the second characteristic value.

[0043] Optionally, when each of the monomer voltage characteristics meets the preset voltage warning condition, before the step of determining that the vehicle has a thermal runaway risk and controlling the vehicle to output thermal runaway warning information, the vehicle thermal runaway warning device is further used to:

[0044] Determine whether the first eigenvalue is greater than a preset eigenvalue threshold and whether a first discrete degree of the first eigenvalue satisfies a preset first discrete degree, and determine whether a second discrete degree of the second eigenvalue satisfies a preset second discrete degree;

[0045] If the first characteristic value is greater than a preset characteristic threshold, the first discrete degree meets a preset first discrete degree, and the second discrete degree meets a preset second discrete degree, it is determined that the single cell voltage characteristic meets a preset voltage warning condition.

[0046] Optionally, the extraction module is further used for:

[0047] Acquire a first voltage mean difference of the high voltage sub-interval and a second voltage mean difference of the low voltage sub-interval in the partial cell voltage data corresponding to each of the time windows;

[0048] Acquire a first voltage deviation degree of the high voltage sub-interval and a second voltage deviation degree of the low voltage sub-interval;

[0049] A first voltage deviation value of the high voltage sub-interval is obtained according to a first product of the first voltage mean difference and the first voltage deviation degree, and a second voltage deviation value of the low voltage sub-interval is obtained according to a second product of the second voltage mean difference and the second voltage deviation degree.

[0050] Optionally, the extraction module is further used for:

[0051] Part of the monomer voltage data corresponding to the first time window is used as the initial window data;

[0052] Acquire a first cell voltage value of the high voltage subinterval in the initial window data, a second cell voltage value of the high voltage subinterval in the partial cell voltage data corresponding to each time window, a third cell voltage value of the low voltage subinterval in the initial window data, and a fourth cell voltage value of the low voltage subinterval in the partial cell voltage data corresponding to each time window;

[0053] A first voltage difference between the first cell voltage value and the second cell voltage value is used as a first voltage mean difference of the high voltage sub-interval, and a second voltage difference between the third cell voltage value and the fourth cell voltage value is used as a second voltage mean difference of the low voltage sub-interval.

[0054] Optionally, the extraction module is further used for:

[0055] Acquire a fifth cell voltage value of each cell voltage data in the high voltage sub-interval, a sixth cell voltage value of each cell voltage data in the low voltage sub-interval, and a voltage median corresponding to each cell voltage data;

[0056] A first voltage deviation degree of the high voltage sub-interval is obtained according to the fifth cell voltage value and the corresponding voltage median, and a second voltage deviation degree of the low voltage sub-interval is obtained according to the sixth cell voltage value and the corresponding voltage median.

[0057] The present application also provides an electronic device, which includes: a memory, a processor, and a program of the vehicle thermal runaway warning method stored in the memory and executable on the processor. When the program of the vehicle thermal runaway warning method is executed by the processor, the steps of the vehicle thermal runaway warning method as described above can be implemented.

[0058] The present application also provides a computer-readable storage medium, on which is stored a program for implementing a vehicle thermal runaway warning method. When the program of the vehicle thermal runaway warning method is executed by a processor, the steps of the vehicle thermal runaway warning method as described above are implemented.

[0059] The present application also provides a computer program product, including a computer program, which implements the steps of the vehicle thermal runaway warning method as described above when executed by a processor.

[0060] The present application provides a vehicle thermal runaway warning method, device, electronic device and readable storage medium, which obtains vehicle operation data, wherein the operation data is multiple single cell voltage data of a battery pack in the vehicle; divides the multiple single cell voltage data into time windows according to the acquisition timing of the operation data, and extracts single cell voltage characteristics from the partial single cell voltage data corresponding to each divided time window; when each of the single cell voltage characteristics meets the preset voltage warning condition, it is determined that the vehicle has a thermal runaway risk, and the vehicle is controlled to output thermal runaway warning information.

[0061] In this way, the present application extracts the single-cell voltage characteristics of the single-cell voltage in the vehicle's time-series voltage data, judges the risk of thermal runaway of the vehicle based on the single-cell voltage characteristics, and then issues a warning for the thermal runaway risk of the vehicle, thereby judging the risk of thermal runaway of the vehicle based on the voltage characteristic change trend of the battery's single-cell voltage, inputting thermal runaway warning information to prompt the user to replace the battery when the vehicle is at risk of thermal runaway, thereby avoiding thermal runaway of the vehicle, thereby reducing the risk of thermal runaway in the vehicle and improving the safety of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] 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.

[0063] 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.

[0064] Figure 1 This is a flow chart of the first embodiment of the vehicle thermal runaway warning method of the present application;

[0065] Figure 2 A schematic diagram of an application scenario of the vehicle thermal runaway warning method of the present application;

[0066] Figure 3 A schematic diagram of another application scenario of the vehicle thermal runaway warning method of the present application;

[0067] Figure 4 A schematic diagram of the device structure of the hardware operating environment involved in the vehicle thermal runaway warning method of this application;

[0068] Figure 5 This is a schematic diagram of the device structure involved in one embodiment of the vehicle thermal runaway warning device of the present application.

[0069] Schematic diagram of the device structure of the hardware operating environment involved in the vehicle thermal runaway warning method in an embodiment of the present application.

[0070] 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

[0071] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application.

[0072] The present application provides a vehicle thermal runaway warning method. In a first embodiment of the vehicle thermal runaway warning method of the present application, the vehicle thermal runaway warning method of the present application includes:

[0073] Acquire operating data of a vehicle, wherein the operating data is multiple single-cell voltage data of a battery pack in the vehicle; divide the multiple single-cell voltage data into time windows according to the acquisition timing of the operating data, and extract single-cell voltage characteristics from part of the single-cell voltage data corresponding to each divided time window; when each of the single-cell voltage characteristics meets a preset voltage warning condition, determine that the vehicle has a thermal runaway risk, and control the vehicle to output thermal runaway warning information.

[0074] It should be noted that in this embodiment, in order to avoid thermal runaway in electric vehicles, the risk of thermal runaway in electric vehicles is detected, so as to provide an early warning to prompt users to replace the battery pack to avoid thermal runaway. At present, the risk of thermal runaway is detected by obtaining parameters such as the temperature, voltage, current and discharge rate of the battery body. However, since the thermal runaway phenomenon generally spreads from a single cell to the entire battery, the risk of thermal runaway in the vehicle is detected only based on the overall parameters of the battery, which will result in low timeliness of the thermal runaway risk warning, making it impossible for users to replace the battery in time, resulting in a high risk of thermal runaway in the vehicle.

[0075] In response to the above-mentioned phenomenon, the present application extracts the single-cell voltage characteristics of the single-cell voltage in the vehicle's time-series voltage data, judges the risk of thermal runaway of the vehicle based on the single-cell voltage characteristics, and then issues a warning for the thermal runaway risk of the vehicle, thereby realizing the risk of thermal runaway of the vehicle based on the voltage characteristic change trend of the battery's single-cell voltage, inputting thermal runaway warning information to prompt the user to replace the battery when the vehicle is at risk of thermal runaway, thereby avoiding thermal runaway of the vehicle, thereby reducing the risk of thermal runaway in the vehicle and improving the safety of the vehicle.

[0076] Please refer to Figure 1 ,like Figure 1 As shown, in the first embodiment of the vehicle thermal runaway warning method of the present application, the vehicle discharge control method of the present application specifically includes the following steps:

[0077] Step S10, obtaining operation data of the vehicle, wherein the operation data is voltage data of multiple cells of a battery pack in the vehicle;

[0078] The vehicle thermal runaway warning method of the present application can be applied to the vehicle, the control system in the vehicle, and the server connected to the vehicle in communication, wherein the communication connection can be a wired connection such as an interface, or a wireless connection such as Bluetooth, a local area network, etc., to achieve interactive data processing and predict the thermal runaway risk of the vehicle. For ease of reading and understanding, the following text uses the above-mentioned vehicle as the execution subject of the vehicle thermal runaway warning method of the present application to specifically explain this embodiment.

[0079] It should be noted that, in the present embodiment, the vehicle operation data is the single cell voltage data of the battery pack in the vehicle obtained at preset time intervals. The preset time interval is the preset interval time for collecting the vehicle operation data. The preset time interval can be 5s or 10s. The preset time interval can be randomly selected by the vehicle control system and / or the vehicle, or can be set by the user.

[0080] In this embodiment, before the thermal runaway phenomenon occurs in the vehicle, the vehicle obtains the operation data of the vehicle.

[0081] In this embodiment, the vehicle receives the vehicle operation data sent by the pressure sensor built into the battery pack.

[0082] Step S20, extracting cell voltage features from part of the cell voltage data corresponding to each time window obtained by dividing the vehicle operation data;

[0083] In this embodiment, the vehicle operation data is divided into time windows according to the first ratio of the number of vehicle operation data to the number of preset window data. The preset window data number is the number of window data in each preset time window data. The preset window data number is the number that can be divided by the number of vehicle operation data. The preset window data number can be 20,000 or 15,000. For example, when the number of vehicle operation data is 60,000 and the number of preset window data is 20,000, the number of time window data is 3, and the vehicle operation data is evenly divided into 3 time window data in a time sequence order. Alternatively, the start and end time of each time window is obtained according to the product of the preset time interval and the number of preset window data. According to the start and end time of each time window, the vehicle operation data is divided into time windows. For example, when the preset time interval is 10s and the number of preset window data is 6, the start and end time of the first time window data is 0s-60s, and the start and end time of the second time window data is 60s-120s.

[0084] As a feasible embodiment, in the above step S20, after the step of dividing the plurality of monomer voltage data into time windows according to the collection timing of the operation data, the following may be specifically included:

[0085] Obtaining a voltage range of a battery pack in the vehicle;

[0086] It should be noted that, in this embodiment, the voltage range is composed of the maximum voltage and the minimum voltage of the battery pack in the vehicle, and the voltage range is determined by the battery characteristics of the battery pack in the vehicle, wherein the battery characteristics include the battery model and battery performance, and the voltage range can be 3.5V-4.2V.

[0087] In this embodiment, the battery model and battery performance of the battery pack in the vehicle are obtained, and the voltage range of the battery pack is obtained based on the battery model and the battery performance.

[0088] Constructing a voltage interval corresponding to the vehicle operation data according to the voltage range and the preset voltage interval range, wherein the voltage interval at least includes a voltage sub-interval;

[0089] It should be noted that, in the present embodiment, the preset voltage interval range is the interval voltage of each preset voltage interval, and the preset voltage interval range may be 0.05V or 0.1V.

[0090] In this embodiment, each voltage interval corresponding to the vehicle operation data is constructed based on the second ratio of the voltage range and the preset voltage interval range. For example, when the voltage range is 3.5V-4.2V and the preset voltage interval range is 0.1V, the first voltage sub-interval is (3.5-3.6), the second voltage sub-interval is (3.6-3.7), the third voltage sub-interval is (3.7-3.8), ..., and the nth voltage sub-interval is (4.1-4.2).

[0091] Part of the monomer voltage data corresponding to each of the time windows is divided into the voltage intervals.

[0092] In this embodiment, the voltage median of the partial single cell voltage data corresponding to each time window is obtained as the single cell voltage value at the moment in each time window, and the single cell voltage value at the moment of each partial single cell voltage data is divided into corresponding voltage sub-intervals according to the voltage interval in which the single cell voltage value is located. For example, when the voltage median of the single cell voltage data from 0s to 1s in the first time window is 3.57V, the single cell voltage value from 0s to 1s in the first time window is 3.57V, which is divided into the first voltage sub-interval (3.5-3.6).

[0093] As an example, see Figure 2 , Figure 2 Including: time window data (time window 1, time window 2, ..., time window n, and data frame 1, data frame ...), voltage sub-intervals (voltage interval 1, voltage interval 2, ..., voltage interval 14 shown in the figure).

[0094] As a feasible embodiment, in the above step S20, the cell voltage feature includes a first characteristic value and a second characteristic value, and the step of extracting the cell voltage feature from the partial cell voltage data corresponding to each time window obtained by division may specifically include:

[0095] Step S21, selecting a high voltage sub-interval and a corresponding low voltage sub-interval corresponding to the partial cell voltage data in each of the voltage sub-intervals;

[0096] In this embodiment, based on the voltage range of each voltage sub-interval and the preset number of voltage intervals, high voltage sub-intervals and corresponding low voltage sub-intervals corresponding to some of the single-cell voltage data of the preset number of voltage intervals are selected. For example, when the preset number of voltage intervals is 2, the two intervals with the lowest voltage range of each voltage sub-interval are used as low voltage sub-intervals, and the two intervals with the highest voltage range of each voltage sub-interval are used as high voltage sub-intervals. Alternatively, the average of the two intervals with the lowest voltage range of each voltage sub-interval is taken to obtain a low voltage sub-interval, and the average of the two intervals with the highest voltage range of each voltage sub-interval is taken to obtain a high voltage sub-interval.

[0097] Step S22, determining a first voltage deviation value of the high voltage sub-interval and a second voltage deviation value of the low voltage sub-interval in the partial cell voltage data corresponding to each of the time windows;

[0098] In this embodiment, based on each of the partial cell voltage data, the first voltage deviation value of the high voltage sub-interval and the second voltage deviation value of the low voltage sub-interval in the partial cell voltage data corresponding to each of the time windows are calculated.

[0099] Step S23: taking a voltage deviation difference between the first voltage deviation value and the second voltage deviation value as the first characteristic value, and taking the second voltage deviation value as the second characteristic value.

[0100] In this embodiment, the voltage deviation difference between each first voltage deviation value and each second voltage deviation value of part of the single-cell voltage data corresponding to each time window is used as the first characteristic value, and each second voltage deviation value is used as the second characteristic value. The first characteristic value and the second characteristic value are integrated to obtain the single-cell voltage characteristics corresponding to part of the single-cell voltage data in each time window.

[0101] As a feasible embodiment, in the above step S30, when the voltage characteristics of each cell meet the preset voltage warning condition, before the step of determining that the vehicle has a thermal runaway risk and controlling the vehicle to output thermal runaway warning information, the following may be specifically included:

[0102] Step A10, determining whether the first eigenvalue is greater than a preset eigenvalue threshold and whether a first discrete degree of the first eigenvalue satisfies a preset first discrete degree, and determining whether a second discrete degree of the second eigenvalue satisfies a preset second discrete degree;

[0103] Step A20: If the first characteristic value is greater than a preset characteristic threshold, the first discrete degree satisfies a preset first discrete degree, and the second discrete degree satisfies a preset second discrete degree, it is determined that the single cell voltage characteristic satisfies a preset voltage warning condition.

[0104] It should be noted that, in the present embodiment, the preset characteristic threshold is a preset first characteristic value critical value for determining that the voltage deviation difference between the first voltage deviation value of the high voltage sub-interval and the second voltage deviation value of the low voltage sub-interval is too small, and the preset characteristic threshold may be 0.00001 or 0.00002. The preset first discrete degree is the preset discrete degree of the voltage deviation difference between the first voltage deviation value of the high voltage sub-interval and the second voltage deviation value of the low voltage sub-interval for determining that the vehicle may have a thermal runaway risk, and the preset first discrete degree may be 4σ. The preset second discrete degree is the preset discrete degree of the second voltage deviation value of the low voltage sub-interval for determining that the vehicle may have a thermal runaway risk, and the preset second discrete degree may be 1σ. The preset voltage warning condition is a preset single voltage characteristic condition for the vehicle to have a thermal runaway risk.

[0105] It can be understood that when the first characteristic value is greater than the preset characteristic threshold, it means that there is a single cell voltage in the vehicle's battery pack that may be overheating, and on this basis, when the first discrete degree meets the preset first discrete degree, and the second discrete degree meets the preset second discrete degree, it means that there are multiple single cell voltages in the vehicle's battery pack that are overheating, that is, the vehicle is at risk of thermal runaway.

[0106] In this embodiment, a first discrete degree of the first characteristic value and a second discrete degree of the second characteristic value are obtained to determine whether the first characteristic value is greater than a preset characteristic threshold and whether the first discrete degree satisfies the preset first discrete degree, and whether the second discrete degree satisfies the preset second discrete degree; if the first characteristic value is greater than the preset characteristic threshold, the first discrete degree satisfies the preset first discrete degree, and the second discrete degree satisfies the preset second discrete degree, then it is determined that the single cell voltage characteristic satisfies the preset voltage warning condition; if the first characteristic value is not greater than the preset characteristic threshold, and / or the first discrete degree does not satisfy the preset first discrete degree, and / or the second discrete degree does not satisfy the preset second discrete degree, then it is determined that the single cell voltage characteristic does not satisfy the preset voltage warning condition.

[0107] Step S30: When the voltage characteristics of each cell meet the preset voltage warning condition, it is determined that the vehicle has a thermal runaway risk, and the vehicle is controlled to output thermal runaway warning information.

[0108] It should be noted that, in the present embodiment, the thermal runaway warning information is information used to alert the user that the vehicle is at risk of thermal runaway, so that the user can replace the battery. The content of the thermal runaway warning information can be text display content, voice broadcast content, or a combination of text display and voice broadcast content.

[0109] In this embodiment, it is determined whether the voltage characteristics of each cell meet the preset voltage warning conditions. If the voltage characteristics of each cell meet the preset voltage warning conditions, it is determined that the vehicle is at risk of thermal runaway, and the vehicle is controlled to output thermal runaway warning information; if the voltage characteristics of some cells do not meet the preset voltage warning conditions, it is determined that the vehicle is not at risk of thermal runaway, and the execution step is returned to: extracting the cell voltage characteristics from the partial cell voltage data corresponding to each divided time window.

[0110] Optionally, the step of controlling the vehicle to output thermal runaway warning information may specifically include: controlling an on-board screen of the vehicle to display the thermal runaway warning information, and / or controlling a sound broadcasting module of the vehicle to broadcast the thermal runaway warning information.

[0111] It is understandable that the internal resistance of each cell in the vehicle's battery pack is calculated through an equivalent circuit model, and the risk of thermal runaway of the vehicle is judged according to the change of the internal resistance of each cell, so as to control the vehicle to output thermal runaway warning information, thereby avoiding the risk of thermal runaway. Since the operating conditions of the actual vehicle are not static, the risk of thermal runaway of the vehicle is judged only by the change of the internal resistance of the cells in the battery pack without considering other factors, which may easily lead to inaccurate judgment of the risk of thermal runaway, resulting in low accuracy of the vehicle's thermal runaway alarm (for example, a thermal runaway alarm is issued when the vehicle does not have a thermal runaway risk, or a thermal runaway alarm cannot be issued in time when the vehicle has a thermal runaway risk). The embodiments of the present application determine the risk of thermal runaway of the vehicle by collecting characteristics of the vehicle's battery pack, such as the current temperature, temperature rise rate, voltage value, voltage value change rate, pressure value in the battery pack, gas composition and content, so as to control the vehicle to output thermal runaway warning information, thereby avoiding the risk of thermal runaway. However, this method can only capture early characteristics of the vehicle when a safety fault has occurred and issue a safety fault alarm, leaving a short time for users to replace the battery, resulting in a high risk of thermal runaway in the vehicle. In addition, collecting the above characteristics requires built-in sensors and the sensors usually require regular maintenance, which increases the cost of thermal runaway risk detection of the vehicle.

[0112] It is understandable that the preset voltage warning condition is an empirical value of voltage characteristic warning obtained from the operation data of a large number of vehicles with thermal runaway phenomena. Therefore, the thermal runaway risk of the vehicle is determined based on the voltage characteristic change trend of the battery's single cell voltage according to the preset voltage warning condition, and when the vehicle has a thermal runaway risk, the thermal runaway warning information is input to prompt the user to replace the battery, thereby avoiding the thermal runaway phenomenon of the vehicle and reducing the risk of thermal runaway in the vehicle.

[0113] In this embodiment, the present application provides a vehicle thermal runaway warning method, device, electronic device and readable storage medium, by acquiring vehicle operation data, wherein the operation data is multiple single cell voltage data of a battery pack in the vehicle; dividing the multiple single cell voltage data into time windows according to the acquisition timing of the operation data, and extracting single cell voltage characteristics from the partial single cell voltage data corresponding to each divided time window; when each of the single cell voltage characteristics meets the preset voltage warning condition, it is determined that the vehicle has a thermal runaway risk, and the vehicle is controlled to output thermal runaway warning information.

[0114] In this way, the present application extracts the single-cell voltage characteristics of the single-cell voltage in the vehicle's time-series voltage data, judges the risk of thermal runaway of the vehicle based on the single-cell voltage characteristics, and then issues a warning for the thermal runaway risk of the vehicle, thereby judging the risk of thermal runaway of the vehicle based on the voltage characteristic change trend of the battery's single-cell voltage, inputting thermal runaway warning information to prompt the user to replace the battery when the vehicle is at risk of thermal runaway, thereby avoiding thermal runaway of the vehicle, thereby reducing the risk of thermal runaway in the vehicle and improving the safety of the vehicle.

[0115] Furthermore, based on the above-mentioned first embodiment of the vehicle thermal runaway warning method of the present application, a second embodiment of the vehicle thermal runaway warning method of the present application is provided.

[0116] In this embodiment, the vehicle thermal runaway warning method of the present application is also implemented by the above-mentioned vehicle as the execution subject. As a feasible embodiment, in step S22, the step of determining the first voltage deviation value of the high voltage sub-interval and the second voltage deviation value of the low voltage sub-interval in the partial cell voltage data corresponding to each time window may specifically include:

[0117] Step B10, obtaining a first voltage mean difference of the high voltage sub-interval and a second voltage mean difference of the low voltage sub-interval in the partial cell voltage data corresponding to each of the time windows;

[0118] It should be noted that, in this embodiment, the voltage mean difference is used to characterize the value of the voltage sub-interval of some single cell voltage data in each time window.

[0119] In this embodiment, based on the partial cell voltage data, the first voltage mean difference of the high voltage sub-interval and the second voltage mean difference of the low voltage sub-interval of the partial cell voltage data in each time window are calculated.

[0120] As a feasible embodiment, in step B10, the step of obtaining the first voltage mean difference of the high voltage sub-interval and the second voltage mean difference of the low voltage sub-interval in the partial cell voltage data corresponding to each time window may specifically include:

[0121] Step B11, using part of the monomer voltage data corresponding to the first time window as initial window data;

[0122] In this embodiment, according to the acquisition timing corresponding to each time window, part of the cell voltage data corresponding to the first time window is used as the initial window data, for example, part of the cell voltage data of the first time window is used as the initial window data.

[0123] Step B12, obtaining the first cell voltage value of the high voltage sub-interval in the initial window data, the second cell voltage value of the high voltage sub-interval in the partial cell voltage data corresponding to each time window, the third cell voltage value of the low voltage sub-interval in the initial window data, and the fourth cell voltage value of the low voltage sub-interval in the partial cell voltage data corresponding to each time window;

[0124] In this embodiment, the average value of the single cell voltages in the high voltage sub-interval in the initial window data is obtained to obtain a first single cell voltage value in the high voltage sub-interval; the average value of the single cell voltages in the high voltage sub-interval in the partial single cell voltage data corresponding to each time window is obtained to obtain a second single cell voltage value in the high voltage sub-interval; the average value of the single cell voltages in the low voltage sub-interval in the initial window data is obtained to obtain a third single cell voltage value in the low voltage sub-interval; the average value of the single cell voltages in the low voltage sub-interval in the partial single cell voltage data corresponding to each time window is obtained to obtain a fourth single cell voltage value in the low voltage sub-interval.

[0125] Step B13: taking the first voltage difference between the first cell voltage value and the second cell voltage value as the first voltage mean difference of the high voltage sub-interval, and taking the second voltage difference between the third cell voltage value and the fourth cell voltage value as the second voltage mean difference of the low voltage sub-interval.

[0126] In this embodiment, the first voltage difference between the first cell voltage value and the second cell voltage value is calculated as the first voltage mean difference of the high voltage sub-interval; the second voltage difference between the third cell voltage value and the fourth cell voltage value is calculated as the second voltage mean difference of the low voltage sub-interval.

[0127] Step B20, obtaining a first voltage deviation degree of the high voltage sub-interval and a second voltage deviation degree of the low voltage sub-interval;

[0128] In this embodiment, the first voltage deviation degree of the high voltage sub-interval is calculated based on the first voltage mean difference, the first single cell voltage value and the third single cell voltage value; the second voltage deviation degree of the low voltage sub-interval is calculated based on the second voltage mean difference, the second single cell voltage difference and the fourth single cell voltage value.

[0129] As a feasible embodiment, in step B20, the step of obtaining the first voltage deviation degree of the high voltage sub-interval and the second voltage deviation degree of the low voltage sub-interval may specifically include:

[0130] Step B21, obtaining the fifth cell voltage value of each cell voltage data in the high voltage sub-interval, the sixth cell voltage value of each cell voltage data in the low voltage sub-interval, and the voltage median corresponding to each cell voltage data;

[0131] In this embodiment, the cell voltage mean of each cell voltage value in the high voltage sub-interval in the partial cell voltage data corresponding to each time window is obtained to obtain the fifth cell voltage value of the high voltage sub-interval; the cell voltage mean of each cell voltage value in the low voltage sub-interval in the partial cell voltage data corresponding to each time window is obtained to obtain the sixth cell voltage value of the low voltage sub-interval; the median of the mean values ​​of each cell voltage in the high voltage sub-interval is obtained to obtain the first voltage median of the cell voltage values ​​in the high voltage sub-interval; the median of the mean values ​​of each cell voltage in the low voltage sub-interval is obtained to obtain the first voltage median of the cell voltage values ​​in the low voltage sub-interval.

[0132] Step B22, obtaining a first voltage deviation degree of the high voltage sub-interval according to the fifth cell voltage value and the corresponding voltage median, and obtaining a second voltage deviation degree of the low voltage sub-interval according to the sixth cell voltage value and the corresponding voltage median;

[0133] In this embodiment, the first voltage deviation degree of the high voltage sub-interval is determined based on the fifth single-cell voltage value, the first voltage median and the number of voltage data in the high voltage sub-interval; the second voltage deviation degree of the low voltage sub-interval is determined based on the sixth single-cell voltage value, the second voltage median and the number of voltage data in the low voltage sub-interval.

[0134] Specifically, they may include:

[0135]

[0136] Among them, dev k is the voltage deviation degree of the voltage sub-interval, n is the number of voltage data in the voltage sub-interval, V mid is the voltage median of each monomer voltage data in the voltage sub-interval, V i It is the single cell voltage value of each single cell voltage data in the voltage sub-interval.

[0137] Step B30, obtaining a first voltage deviation value of the high voltage sub-interval based on a first product of the first voltage mean difference and the first voltage deviation degree, and obtaining a second voltage deviation value of the low voltage sub-interval based on a second product of the second voltage mean difference and the second voltage deviation degree.

[0138] In this embodiment, a first product of the first voltage mean difference and the first voltage deviation degree is calculated to obtain a first voltage deviation value of the high voltage sub-interval; a second product of the second voltage mean difference and the second voltage deviation degree is calculated to obtain a second voltage deviation value of the low voltage sub-interval.

[0139] As an example, Figure 3 Schematic diagram of an application scenario of the vehicle thermal runaway warning method provided by this application. Figure 3 As shown, the application scenario may include: vehicle 01, control device 03 connected to vehicle 01 for communication, and user device 02 connected to vehicle 01 for communication. Figure 3 In the embodiment, when all users of vehicle 01 are not in vehicle 01, thermal runaway warning information is sent to user devices 02 corresponding to all users through vehicle 01 to prompt users to replace vehicle battery packs; or, when a first user of vehicle 01 is in vehicle 01 and a second user is not in vehicle 01, thermal runaway warning information is displayed through vehicle 01 output, and / or, the thermal runaway warning information is sent to user device 02 corresponding to the second user; or, when all users are not in vehicle 01, thermal runaway warning information is sent to control device 03 through vehicle 01 to prompt vehicle operation and maintenance personnel to replace the battery pack.

[0140] This embodiment obtains the single cell voltage characteristics corresponding to each time window data in the time-series vehicle operation data, and determines the risk of thermal runaway of the vehicle through the preset voltage warning conditions of the single cell voltage characteristics. When the vehicle is at risk of thermal runaway, thermal runaway warning information is input to prompt the user to replace the battery, thereby avoiding thermal runaway of the vehicle, thereby reducing the risk of thermal runaway of the vehicle and improving the safety of the vehicle.

[0141] In addition, an embodiment of the present application also provides a vehicle as mentioned in any of the above embodiments.

[0142] Reference Figure 4 , Figure 4 It is a schematic diagram of the equipment structure of the hardware operating environment involved in the vehicle mentioned in the embodiment of the present application.

[0143] like Figure 4As shown, the vehicle may include: a processor 1001, such as a CPU, a communication bus 1002, a network interface 1003, and a memory 1004. The communication bus 1002 is used to realize the connection and communication between the processor 1001 and the memory 1004. The memory 1004 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. The memory 1004 may also be a storage device independent of the aforementioned processor 1001.

[0144] Optionally, the vehicle may also include a rectangular user interface, a network interface, a camera, an RF (Radio Frequency) circuit, a sensor, an audio circuit, a WiFi module, etc. The rectangular user interface may include a display screen (Display), an input submodule such as a keyboard (Keyboard), and the optional rectangular user interface may also include a standard wired interface and a wireless interface. The network interface may optionally include a standard wired interface and a wireless interface (such as a WI-FI interface).

[0145] Those skilled in the art will understand that Figure 4 The structure shown in the figure does not constitute a limitation on the vehicle. Based on different design requirements of actual applications, in different feasible implementations, the vehicle may of course include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0146] like Figure 4 As shown, the memory 1004 as a storage medium may include an operating system, a network communication module, and a vehicle thermal runaway warning program. The operating system is a program that manages and controls vehicle hardware and software resources, and supports the operation of the vehicle thermal runaway warning program and other software and / or programs. The network communication module is used to realize communication between the components inside the memory 1004, and communication with other hardware and software in the vehicle thermal runaway warning system.

[0147] exist Figure 4 In the vehicle shown, the processor 1001 is used to execute the vehicle thermal runaway warning program stored in the memory 1004 to implement the steps of the vehicle thermal runaway warning method described in any of the above embodiments.

[0148] The specific implementation method of the vehicle based on this application is basically the same as the above-mentioned embodiments of the vehicle thermal runaway warning method, and will not be repeated here.

[0149] In addition, the present application also provides a vehicle thermal runaway warning device, and the vehicle discharge control device of the present application is applied to the vehicle to control the vehicle thermal runaway warning, such as Figure 5 As shown, the vehicle thermal runaway warning device of the present application includes:

[0150] An acquisition module, used for acquiring operation data of a vehicle, wherein the operation data is voltage data of multiple cells of a battery pack in the vehicle;

[0151] An extraction module, used to divide the plurality of said monomer voltage data into time windows according to the collection timing of said operation data, and extract the monomer voltage characteristics from the partial monomer voltage data corresponding to each time window obtained by the division;

[0152] The control module is used to determine that the vehicle has a thermal runaway risk when the voltage characteristics of each of the monomers meet a preset voltage warning condition, and control the vehicle to output thermal runaway warning information.

[0153] Optionally, after the step of dividing the plurality of monomer voltage data into time windows according to the collection sequence of the operation data, the vehicle thermal runaway warning device is further used to:

[0154] Obtaining a voltage range of a battery pack in the vehicle;

[0155] Constructing a voltage interval corresponding to the vehicle operation data according to the voltage range and the preset voltage interval range, wherein the voltage interval at least includes a voltage sub-interval;

[0156] Part of the monomer voltage data corresponding to each of the time windows is divided into the voltage intervals.

[0157] Optionally, the cell voltage feature includes a first feature value and a second feature value, and the extraction module is further used to:

[0158] Selecting a high voltage sub-interval and a corresponding low voltage sub-interval corresponding to the partial monomer voltage data in each of the voltage sub-intervals;

[0159] Determine a first voltage deviation value of the high voltage sub-interval and a second voltage deviation value of the low voltage sub-interval in the partial cell voltage data corresponding to each of the time windows;

[0160] A voltage deviation difference between the first voltage deviation value and the second voltage deviation value is used as the first characteristic value, and the second voltage deviation value is used as the second characteristic value.

[0161] Optionally, when each of the single cell voltage characteristics meets the preset voltage warning condition, before the step of determining that the vehicle has a thermal runaway risk and controlling the vehicle to output thermal runaway warning information, the vehicle thermal runaway warning device is further used to:

[0162] Determine whether the first eigenvalue is greater than a preset eigenvalue threshold and whether a first discrete degree of the first eigenvalue satisfies a preset first discrete degree, and determine whether a second discrete degree of the second eigenvalue satisfies a preset second discrete degree;

[0163] If the first characteristic value is greater than a preset characteristic threshold, the first discrete degree meets a preset first discrete degree, and the second discrete degree meets a preset second discrete degree, it is determined that the single cell voltage characteristic meets a preset voltage warning condition.

[0164] Optionally, the extraction module is further used for:

[0165] Acquire a first voltage mean difference of the high voltage sub-interval and a second voltage mean difference of the low voltage sub-interval in the partial cell voltage data corresponding to each of the time windows;

[0166] Acquire a first voltage deviation degree of the high voltage sub-interval and a second voltage deviation degree of the low voltage sub-interval;

[0167] A first voltage deviation value of the high voltage sub-interval is obtained according to a first product of the first voltage mean difference and the first voltage deviation degree, and a second voltage deviation value of the low voltage sub-interval is obtained according to a second product of the second voltage mean difference and the second voltage deviation degree.

[0168] Optionally, the extraction module is further used for:

[0169] Part of the monomer voltage data corresponding to the first time window is used as the initial window data;

[0170] Acquire a first cell voltage value of the high voltage subinterval in the initial window data, a second cell voltage value of the high voltage subinterval in the partial cell voltage data corresponding to each time window, a third cell voltage value of the low voltage subinterval in the initial window data, and a fourth cell voltage value of the low voltage subinterval in the partial cell voltage data corresponding to each time window;

[0171] A first voltage difference between the first cell voltage value and the second cell voltage value is used as a first voltage mean difference of the high voltage sub-interval, and a second voltage difference between the third cell voltage value and the fourth cell voltage value is used as a second voltage mean difference of the low voltage sub-interval.

[0172] Optionally, the extraction module is further used for:

[0173] Acquire a fifth cell voltage value of each cell voltage data in the high voltage sub-interval, a sixth cell voltage value of each cell voltage data in the low voltage sub-interval, and a voltage median corresponding to each cell voltage data;

[0174] A first voltage deviation degree of the high voltage sub-interval is obtained according to the fifth cell voltage value and the corresponding voltage median, and a second voltage deviation degree of the low voltage sub-interval is obtained according to the sixth cell voltage value and the corresponding voltage median.

[0175] The specific implementation of each functional module of the vehicle discharge control device of the present application is basically the same as the various embodiments of the vehicle discharge control method described above, and will not be repeated here.

[0176] An embodiment of the present application provides a computer storage medium, and the computer storage medium stores one or more programs, and the one or more programs can also be executed by one or more processors to implement the steps of the vehicle discharge control method described in any one of the above.

[0177] The specific implementation of the computer storage medium of the present application is basically the same as the various embodiments of the above-mentioned vehicle discharge control method, and will not be repeated here.

[0178] The present application also provides a computer program product, including a computer program, which implements the steps of the above-mentioned vehicle discharge control method when executed by a processor.

[0179] The specific implementation of the computer program product of the present application is basically the same as the various embodiments of the above-mentioned vehicle discharge control method, and will not be repeated here.

[0180] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0181] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0182] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for a terminal device (which can be a car computer, a smart phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0183] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A vehicle thermal runaway warning method, characterized in that: The vehicle thermal runaway early warning method comprises: Acquiring operation data of a vehicle, wherein the operation data is voltage data of multiple cells of a battery pack in the vehicle; Dividing the plurality of monomer voltage data into time windows according to the collection timing of the operation data; Obtaining a voltage range of a battery pack in the vehicle; Constructing a voltage interval corresponding to the vehicle operation data according to the voltage range and the preset voltage interval range, wherein the voltage interval at least includes a voltage sub-interval; Dividing the partial monomer voltage data corresponding to each of the time windows into corresponding voltage sub-intervals; Selecting a high voltage sub-interval and a corresponding low voltage sub-interval corresponding to the partial monomer voltage data in each of the voltage sub-intervals; Determine a first voltage deviation value of the high voltage sub-interval and a second voltage deviation value of the low voltage sub-interval in the partial cell voltage data corresponding to each of the time windows; Using a voltage deviation difference between the first voltage deviation value and the second voltage deviation value as a first characteristic value, and using the second voltage deviation value as a second characteristic value, wherein the first characteristic value and the second characteristic value are single-cell voltage characteristics; When the voltage characteristics of each of the monomers meet the preset voltage warning conditions, it is determined that the vehicle has a thermal runaway risk, and the vehicle is controlled to output thermal runaway warning information.

2. The vehicle thermal runaway warning method according to claim 1, characterized in that: Before the step of determining that the vehicle has a thermal runaway risk when the voltage characteristics of each cell meet the preset voltage warning condition and controlling the vehicle to output thermal runaway warning information, the method further includes: Determine whether the first eigenvalue is greater than a preset eigenvalue threshold and whether a first discrete degree of the first eigenvalue satisfies a preset first discrete degree, and determine whether a second discrete degree of the second eigenvalue satisfies a preset second discrete degree; If the first characteristic value is greater than a preset characteristic threshold, the first discrete degree meets a preset first discrete degree, and the second discrete degree meets a preset second discrete degree, it is determined that the single cell voltage characteristic meets a preset voltage warning condition.

3. The vehicle thermal runaway warning method according to claim 2, characterized in that: The step of determining the first voltage deviation value of the high voltage sub-interval and the second voltage deviation value of the low voltage sub-interval in the partial cell voltage data corresponding to each time window includes: Acquire a first voltage mean difference of the high voltage sub-interval and a second voltage mean difference of the low voltage sub-interval in the partial cell voltage data corresponding to each of the time windows; Acquire a first voltage deviation degree of the high voltage sub-interval and a second voltage deviation degree of the low voltage sub-interval; A first voltage deviation value of the high voltage sub-interval is obtained according to a first product of the first voltage mean difference and the first voltage deviation degree, and a second voltage deviation value of the low voltage sub-interval is obtained according to a second product of the second voltage mean difference and the second voltage deviation degree.

4. The vehicle thermal runaway warning method according to claim 3, characterized in that: The step of obtaining the first voltage mean difference of the high voltage sub-interval and the second voltage mean difference of the low voltage sub-interval in the partial cell voltage data corresponding to each time window includes: Part of the monomer voltage data corresponding to the first time window is used as the initial window data; Acquire a first cell voltage value of the high voltage subinterval in the initial window data, a second cell voltage value of the high voltage subinterval in the partial cell voltage data corresponding to each time window, a third cell voltage value of the low voltage subinterval in the initial window data, and a fourth cell voltage value of the low voltage subinterval in the partial cell voltage data corresponding to each time window; A first voltage difference between the first cell voltage value and the second cell voltage value is used as a first voltage mean difference of the high voltage sub-interval, and a second voltage difference between the third cell voltage value and the fourth cell voltage value is used as a second voltage mean difference of the low voltage sub-interval.

5. The vehicle thermal runaway warning method according to claim 3, characterized in that: The step of obtaining the first voltage deviation degree of the high voltage sub-interval and the second voltage deviation degree of the low voltage sub-interval comprises: Acquire a fifth cell voltage value of each cell voltage data in the high voltage sub-interval, a sixth cell voltage value of each cell voltage data in the low voltage sub-interval, and a voltage median corresponding to each cell voltage data; A first voltage deviation degree of the high voltage sub-interval is obtained according to the fifth cell voltage value and the corresponding voltage median, and a second voltage deviation degree of the low voltage sub-interval is obtained according to the sixth cell voltage value and the corresponding voltage median.

6. A vehicle thermal runaway warning device, characterized in that: The vehicle thermal runaway warning device comprises: An acquisition module, used for acquiring operation data of a vehicle, wherein the operation data is voltage data of multiple cells of a battery pack in the vehicle; An extraction module, used to divide the plurality of said monomer voltage data into time windows according to the collection timing of said operation data, and extract the monomer voltage characteristics from the partial monomer voltage data corresponding to each time window obtained by the division; A control module, configured to determine that the vehicle has a thermal runaway risk when the voltage characteristics of each of the cells meet a preset voltage warning condition, and control the vehicle to output thermal runaway warning information; Wherein, the extraction module is specifically used for: Obtaining a voltage range of a battery pack in the vehicle; Constructing a voltage interval corresponding to the vehicle operation data according to the voltage range and the preset voltage interval range, wherein the voltage interval at least includes a voltage sub-interval; Dividing the partial monomer voltage data corresponding to each of the time windows into corresponding voltage sub-intervals; Selecting a high voltage sub-interval and a corresponding low voltage sub-interval corresponding to the partial monomer voltage data in each of the voltage sub-intervals; Determine a first voltage deviation value of the high voltage sub-interval and a second voltage deviation value of the low voltage sub-interval in the partial cell voltage data corresponding to each of the time windows; A voltage deviation difference between the first voltage deviation value and the second voltage deviation value is used as a first characteristic value, and the second voltage deviation value is used as a second characteristic value, wherein the first characteristic value and the second characteristic value are single-cell voltage characteristics.

7. An electronic device, characterized in that: The electronic device comprises: at least one processor; and, a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed 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 perform the steps of the vehicle thermal runaway warning method according to any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a program for implementing a vehicle thermal runaway warning method, and the program for implementing a vehicle thermal runaway warning method is executed by a processor to implement the steps of the vehicle thermal runaway warning method as described in any one of claims 1 to 5.

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