Battery thermal runaway processing method and device, electronic equipment and storage medium

Abstract

The invention discloses a battery thermal runaway processing method and device, electronic equipment and a storage medium. The method comprises the steps that whether state parameters of a battery of a vehicle meet any early warning state combination condition or not is detected; the early warning state combination condition comprises an early warning condition of one basic state parameter and an early warning condition of one corresponding sub state parameter; if any early warning state combination condition is satisfied, determining that thermal runaway of the battery occurs; if the current vehicle is in the dormant state, thermal runaway fault information is reported; if the vehicle is in the non-dormant state, vehicle evacuation alarm processing is carried out, and thermal runaway fault information is reported; if the high-voltage relay of the battery is in the closed state, judging whether the vehicle speed is smaller than a preset speed; if the speed is smaller than the preset speed, directly disconnecting a high-voltage relay of the battery; if the speed is not smaller than the preset speed, the allowable power of the vehicle is reduced to zero according to the speed corresponding to the current allowable power of the vehicle, and after the allowable feedback power of the vehicle is set to zero, a high-voltage relay of the battery is disconnected.

Description

Technical Field

[0001] The present application relates to the field of vehicle monitoring technology, and in particular to a battery thermal runaway processing method and device, electronic equipment, and storage medium. Background Art

[0002] In recent years, with the rapid development of the new energy vehicle market, lithium-ion batteries have been widely used, and the accompanying power battery safety issues have gradually attracted social attention. Among them, fire accidents caused by thermal runaway of power batteries have occurred frequently, resulting in serious injuries and property losses. Therefore, it is very important to monitor the thermal runaway of batteries.

[0003] In order to avoid false alarms that affect the normal driving of the vehicle, the current monitoring of thermal runaway of the battery mainly tests multiple parameters such as battery temperature, voltage, temperature rise rate, and voltage change rate. When it is detected that all of these detected parameters meet the corresponding preset conditions, for example, when all parameters exceed the corresponding thresholds, it is determined that the battery has thermal runaway and a thermal runaway alarm is issued.

[0004] Since the existing method requires multiple parameters to meet the corresponding conditions, false alarms can be avoided. However, these parameters usually meet the preset conditions only when the thermal runaway is relatively serious. Therefore, it is impossible to make an accurate judgment when the thermal runaway has just occurred or the thermal runaway is relatively mild. In addition, the current method only issues an alarm when it is determined that the battery has thermal runaway, and there is no corresponding treatment method, which cannot effectively reduce personal safety and property losses. Summary of the invention

[0005] Based on the above-mentioned deficiencies of the prior art, the present application provides a battery thermal runaway processing method and device, electronic device, and storage medium to solve the problem that the prior art cannot accurately judge thermal runaway and lacks processing measures, thereby failing to effectively reduce personal safety and property losses.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] The first aspect of the present application provides a battery thermal runaway processing method, comprising:

[0008] Detect whether the state parameters of the target battery of the current vehicle meet any preset warning state combination conditions; wherein the warning state combination conditions include a warning condition of a basic state parameter and a warning condition of a corresponding sub-state parameter; the basic state parameters include the maximum temperature of the battery, the battery temperature rise rate, the maximum temperature difference of the battery, and the temperature sensor state; the sub-state parameters include the temperature sensor state, the battery cell voltage, the battery voltage change rate, the daisy chain communication state, and the voltage sampling line state;

[0009] If it is detected that the state parameter of the target battery of the current vehicle meets any one of the warning state combination conditions, it is determined that the target battery has thermal runaway;

[0010] If the vehicle is currently in a dormant state, thermal runaway fault information is reported;

[0011] If the vehicle is in a non-dormant state, controlling the vehicle to perform vehicle evacuation warning processing and report thermal runaway fault information;

[0012] If the high-voltage relay of the target battery of the vehicle is in a closed state, determining whether the speed of the vehicle is less than a preset speed;

[0013] If the speed of the vehicle is less than a preset speed, controlling the vehicle to disconnect the high-voltage relay of the target battery;

[0014] If the speed of the vehicle is not less than a preset speed, reducing the allowable power of the vehicle to zero at a rate corresponding to the current allowable power of the vehicle, and immediately limiting the allowable regenerative power of the vehicle to zero;

[0015] The vehicle is controlled to disconnect a high voltage relay of the target battery.

[0016] Optionally, in the above-mentioned battery thermal runaway processing method, the detecting whether the state parameter of the target battery of the current vehicle satisfies any preset warning state combination condition includes:

[0017] If the vehicle is not in a dormant state, real-time detection of whether the state parameters of the target battery of the vehicle currently meet any of the preset warning state combination conditions;

[0018] If the vehicle is in a dormant state, the battery management system is awakened at each preset interval corresponding to the current number of detections to detect whether the state parameters of the target battery of the current vehicle meet any preset combination of the warning states; wherein the current number of detections is the number of detections that have been performed since the vehicle entered the dormant state.

[0019] Optionally, in the above-mentioned battery thermal runaway processing method, the detecting whether the state parameter of the target battery of the current vehicle satisfies any preset warning state combination condition includes:

[0020] Detecting whether a state parameter of a target battery of the vehicle currently meets a warning condition of any of the basic state parameters;

[0021] Among them, the warning condition of the maximum battery temperature is that the maximum battery temperature is higher than the first preset temperature and lasts for a first preset time; the warning condition of the battery temperature rise rate is that the rise rate of the maximum temperature of the target battery is greater than the preset rate; the warning condition of the maximum battery temperature difference is that the maximum battery temperature difference is higher than the second preset temperature and lasts for a second preset time; the warning condition of the temperature sensor state is that the temperature sensor fails;

[0022] If it is detected that the state parameters of the target battery of the current vehicle meet the warning conditions of any one of the basic state parameters, then it is detected whether the state parameters of the target battery of the current vehicle meet the warning conditions of any one of the sub-state parameters corresponding to the target basic state parameters; wherein the target basic state parameters are the basic state parameters that currently meet their warning conditions.

[0023] Optionally, in the above-mentioned battery thermal runaway processing method, the sub-state parameter corresponding to the maximum battery temperature includes all the sub-state parameters; the sub-state parameter corresponding to the battery temperature rise rate includes each sub-state parameter except the daisy chain communication state; the sub-state parameter corresponding to the maximum battery temperature difference includes the battery cell voltage, the battery voltage change rate, and the daisy chain communication state; the sub-state parameter corresponding to the temperature sensor state includes the battery cell voltage and the battery voltage change rate;

[0024] Among them, the warning condition for the battery cell voltage is that the cell voltage is less than the preset voltage and lasts for the third preset time; the warning condition for the battery voltage change rate is that the voltage of any battery cell decreases by more than a preset decrease ratio within the fourth preset time; the warning condition for the daisy chain communication status is that the daisy chain communication is disconnected; the warning condition for the voltage sampling line status is that the sampling line has a disconnection fault.

[0025] Optionally, in the above-mentioned battery thermal runaway processing method, the controlling the vehicle to perform vehicle evacuation warning processing and reporting thermal runaway fault information includes:

[0026] Sending the thermal runaway fault information to a vehicle controller, so as to upload the thermal runaway fault information to a cloud data platform through the vehicle controller;

[0027] The vehicle controller controls the horn sound module, the light combination module, the instrument display module, and the voice control module of the vehicle to prompt the person to leave the vehicle;

[0028] The vehicle controller controls the door control module to enter an unlocked state, and controls the anti-theft control module to stop monitoring.

[0029] Optionally, in the above-mentioned battery thermal runaway processing method, before reducing the allowable power of the vehicle to zero at a rate corresponding to the current allowable power of the vehicle and immediately limiting the allowable regenerative power of the vehicle to zero, the method includes:

[0030] Determining whether the remaining power of the target battery is greater than a preset power ratio;

[0031] If it is determined that the remaining power of the target battery is not greater than the preset power ratio, the vehicle's allowable power is reduced to zero at a rate corresponding to the vehicle's current allowable power, and the vehicle's allowable regenerative power is immediately limited to zero;

[0032] If it is determined that the remaining power of the target battery is greater than the preset power ratio, the allowable regenerative power of the vehicle is immediately limited to zero, and the allowable power of the vehicle is controlled to be linearly reduced to zero within a fifth preset time.

[0033] Optionally, in the above-mentioned battery thermal runaway processing method, reducing the allowable power of the vehicle to zero at a rate corresponding to the current allowable power of the vehicle, and immediately limiting the allowable regenerative power of the vehicle to zero, include:

[0034] Determining whether the current permissible power of the vehicle is less than a first preset power;

[0035] If it is determined that the current allowable power of the vehicle is not less than the first preset power, the allowable feedback power of the vehicle is immediately limited to zero, and the allowable power of the vehicle is controlled to be linearly reduced to zero within a sixth preset time;

[0036] If it is determined that the current allowable power of the vehicle is less than the first preset power, then determining whether the current allowable power of the vehicle is less than the second preset power; wherein the second preset power is less than the first preset power;

[0037] If it is determined that the current allowable power of the vehicle is not less than the second preset power, the allowable feedback power of the vehicle is immediately limited to zero, and the allowable power of the vehicle is controlled to be linearly reduced to the second preset power within a seventh preset time, and then the allowable power of the vehicle is controlled to be immediately reduced to zero;

[0038] If it is determined that the current allowable power of the vehicle is less than the second preset power, the allowable feedback power of the vehicle is immediately limited to zero, and the allowable power of the vehicle is controlled to remain at the current allowable power of the vehicle for an eighth preset time, and then the allowable power of the vehicle is set to zero.

[0039] A second aspect of the present application provides a battery thermal runaway processing device, comprising:

[0040] A detection unit, used to detect whether the state parameters of the target battery of the current vehicle meet any preset warning state combination condition; wherein the warning state combination condition includes a warning condition of a basic state parameter and a warning condition of a corresponding sub-state parameter; the basic state parameter includes the maximum temperature of the battery, the battery temperature rise rate, the maximum temperature difference of the battery, and the temperature sensor state; the sub-state parameter includes the temperature sensor state, the battery cell voltage, the battery voltage change rate, the daisy chain communication state, and the voltage sampling line state;

[0041] A result determination unit, configured to determine that thermal runaway occurs in the target battery when it is detected that the state parameter of the target battery of the current vehicle satisfies any one of the warning state combination conditions;

[0042] A first reporting unit, used for reporting thermal runaway fault information when the vehicle is in a dormant state;

[0043] an alarm unit, used to control the vehicle to perform vehicle evacuation alarm processing and report thermal runaway fault information when the vehicle is in a non-dormant state;

[0044] a speed determination unit, configured to determine whether the speed of the vehicle is less than a preset speed when the high-voltage relay of the target battery of the vehicle is in a closed state;

[0045] a power control unit, configured to reduce the allowable power of the vehicle to zero at a rate corresponding to the current allowable power of the vehicle and immediately limit the allowable regenerative power of the vehicle to zero when the speed of the vehicle is not less than a preset speed;

[0046] A disconnection unit is used to control the vehicle to disconnect the high-voltage relay of the target battery when the speed of the vehicle is less than a preset speed and the allowable power of the vehicle has dropped to zero.

[0047] Optionally, in the above-mentioned battery thermal runaway processing device, the detection unit includes:

[0048] A real-time detection unit, used for detecting in real time whether a state parameter of a target battery of the vehicle currently satisfies any one of the preset warning state combination conditions when the vehicle is in a non-dormant state;

[0049] The inspection unit is used to wake up the battery management system to detect whether the state parameters of the target battery of the current vehicle meet any preset combination of warning state conditions at each preset interval time corresponding to the current number of detections when the vehicle is in a dormant state; wherein the current number of detections is the number of detections that have been performed since the vehicle entered the dormant state.

[0050] Optionally, in the above-mentioned battery thermal runaway processing device, the detection unit includes:

[0051] A basic inspection unit, used to detect whether the state parameter of the target battery of the vehicle currently meets the warning condition of any basic state parameter;

[0052] Among them, the warning condition of the maximum battery temperature is that the maximum battery temperature is higher than the first preset temperature and lasts for a first preset time; the warning condition of the battery temperature rise rate is that the rise rate of the maximum temperature of the target battery is greater than the preset rate; the warning condition of the maximum battery temperature difference is that the maximum battery temperature difference is higher than the second preset temperature and lasts for a second preset time; the warning condition of the temperature sensor state is that the temperature sensor fails;

[0053] The secondary detection unit is used to detect whether the state parameters of the target battery of the current vehicle meet the warning conditions of any one of the sub-state parameters corresponding to the target basic state parameters when it is detected that the state parameters of the target battery of the current vehicle meet the warning conditions of any one of the basic state parameters; wherein the target basic state parameters are the basic state parameters that currently meet their warning conditions.

[0054] Optionally, in the above-mentioned battery thermal runaway processing device, the sub-state parameter corresponding to the maximum battery temperature includes all the sub-state parameters; the sub-state parameter corresponding to the battery temperature rise rate includes each of the sub-state parameters except the daisy chain communication state; the sub-state parameter corresponding to the maximum battery temperature difference includes the battery cell voltage, the battery voltage change rate, and the daisy chain communication state; the sub-state parameter corresponding to the temperature sensor state includes the battery cell voltage and the battery voltage change rate;

[0055] Among them, the warning condition for the battery cell voltage is that the cell voltage is less than the preset voltage and lasts for the third preset time; the warning condition for the battery voltage change rate is that the voltage of any battery cell decreases by more than a preset decrease ratio within the fourth preset time; the warning condition for the daisy chain communication status is that the daisy chain communication is disconnected; the warning condition for the voltage sampling line status is that the sampling line has a disconnection fault.

[0056] Optionally, in the above-mentioned battery thermal runaway processing device, the alarm unit includes:

[0057] A second reporting unit, configured to send the thermal runaway fault information to a vehicle controller, so as to upload the thermal runaway fault information to a cloud data platform through the vehicle controller;

[0058] A prompting unit, used to control the horn sound module, light combination module, instrument display module, and voice control module of the vehicle through the vehicle controller to prompt a person to leave the vehicle;

[0059] The release unit is used to control the door control module to enter the unlocking state through the vehicle controller, and control the anti-theft control module to stop monitoring.

[0060] Optionally, in the above-mentioned battery thermal runaway processing device, it also includes:

[0061] A power determination unit, used to determine whether the remaining power of the target battery is greater than a preset power ratio;

[0062] If it is determined that the remaining power of the target battery is not greater than the preset power ratio, the power control unit reduces the allowable power of the vehicle to zero at a rate corresponding to the current allowable power of the vehicle, and immediately limits the allowable feedback power of the vehicle to zero;

[0063] The first control unit is used to immediately limit the allowable regenerative power of the vehicle to zero when it is determined that the remaining power of the target battery is greater than a preset power ratio, and control the allowable power of the vehicle to be linearly reduced to zero within a fifth preset time.

[0064] Optionally, in the above-mentioned battery thermal runaway processing device, the power control unit includes:

[0065] A first judging unit, configured to judge whether the current permissible power of the vehicle is less than a first preset power;

[0066] a second control unit, configured to immediately limit the allowable feedback power of the vehicle to zero when it is determined that the current allowable power of the vehicle is not less than the first preset power, and control the allowable power of the vehicle to be linearly reduced to zero within a sixth preset time;

[0067] a second judgment unit, configured to judge whether the current allowable power of the vehicle is less than a second preset power when judging that the current allowable power of the vehicle is less than the first preset power; wherein the second preset power is less than the first preset power;

[0068] a third control unit, configured to immediately limit the allowable feedback power of the vehicle to zero when it is determined that the current allowable power of the vehicle is not less than the second preset power, and control the allowable power of the vehicle to be linearly reduced to the second preset power within a seventh preset time, and then control the allowable power of the vehicle to be immediately reduced to zero;

[0069] The fourth control unit is used to immediately limit the allowable feedback power of the vehicle to zero when it is determined that the current allowable power of the vehicle is less than the second preset power, and control the allowable power of the vehicle to remain at the current allowable power of the vehicle for an eighth preset time, and then set the allowable power of the vehicle to zero.

[0070] A third aspect of the present application provides an electronic device, including:

[0071] Memory and processor;

[0072] Wherein, the memory is used to store programs;

[0073] The processor is used to execute the program, and when the program is executed, it is specifically used to implement the battery thermal runaway processing method as described in any one of the above items.

[0074] In a fourth aspect, the present application provides a computer storage medium for storing a computer program, wherein when the computer program is executed, it is used to implement the battery thermal runaway processing method as described in any one of the above.

[0075] The present application provides a battery thermal runaway processing method, which detects whether the state parameters of the target battery of the current vehicle meet any preset warning state combination conditions. Among them, the warning state combination conditions include a warning condition of a basic state parameter and a warning condition of a corresponding sub-state parameter. The basic state parameters include the maximum temperature of the battery, the battery temperature rise rate, the maximum temperature difference of the battery, and the temperature sensor state. The sub-state parameters include the temperature sensor state, the battery cell voltage, the battery voltage change rate, the daisy chain communication state, and the voltage sampling line state. When the basic state parameter is judged to be abnormal, the corresponding sub-state parameter is further judged, that is, it is further determined that when the sub-state parameter is also abnormal, it is determined that thermal runaway occurs, so that the thermal runaway anomaly that occurs in various situations can be accurately judged. Therefore, if it is detected that the state parameters of the target battery of the current vehicle meet any warning state combination conditions, it is determined that the target battery has thermal runaway. And when the current vehicle is in a dormant state, the thermal runaway fault information is reported to inform the user that the battery has thermal runaway. When the vehicle is in a non-dormant state, the vehicle is controlled to perform vehicle evacuation alarm processing and report thermal runaway fault information, so that the people in the vehicle can evacuate the vehicle in time and understand the thermal runaway situation. In addition, if the high-voltage relay of the target battery of the vehicle is in a closed state, it is determined whether the speed of the vehicle is less than the preset speed. If the speed of the vehicle is less than the preset speed, the vehicle is controlled to disconnect the high-voltage relay of the target battery. If the speed of the vehicle is not less than the preset speed, the allowable power of the vehicle is reduced to zero at a rate corresponding to the current allowable power of the vehicle, and the allowable feedback power of the vehicle is immediately limited to zero. Finally, the vehicle is controlled to disconnect the high-voltage relay of the target battery, thereby ensuring that the vehicle has sufficient power to park safely, and the allowable power is reduced as soon as possible to avoid further aggravation of thermal runaway, thereby effectively ensuring the personal and property safety of personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] 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, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0077] Figure 1 A flowchart of a battery thermal runaway processing method provided in an embodiment of the present application;

[0078] Figure 2 A flowchart of a method for detecting whether any preset warning state combination condition is met provided in an embodiment of the present application;

[0079] Figure 3A flow chart of a method for controlling a vehicle to perform vehicle evacuation warning processing and report thermal runaway fault information provided in an embodiment of the present application;

[0080] Figure 4 A flow chart of a method for controlling allowable power and allowable feedback power provided in an embodiment of the present application;

[0081] Figure 5 A schematic diagram of the architecture of a battery thermal runaway processing device provided in an embodiment of the present application;

[0082] Figure 6 A schematic diagram of the architecture of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0083] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions 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 are within the scope of protection of this application.

[0084] In this application, relational terms such as first and second, etc. are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants 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 statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0085] The present application embodiment provides a method for handling battery thermal runaway, such as Figure 1 As shown, the following steps are included:

[0086] S101, detecting whether the state parameters of the target battery of the current vehicle meet any preset warning state combination condition.

[0087] Among them, the warning state combination condition includes a warning condition of a basic state parameter and a warning condition of a corresponding sub-state parameter. Therefore, the state parameter that reflects thermal runaway with a greater probability can be judged first, that is, the basic state parameter can be judged first. When the basic state parameter is abnormal, it is further judged in combination with other state parameters that are correlated with it, that is, the corresponding sub-state parameter is judged. If the corresponding sub-state parameter is also abnormal, it can be determined that the battery has thermal runaway. Therefore, if it is detected that the state parameter of the target battery of the current vehicle meets any preset warning state combination condition, step S102 is executed.

[0088] Specifically, in the embodiment of the present application, the basic state parameters include the maximum battery temperature, the battery temperature rise rate, the maximum battery temperature difference, and the temperature sensor state. The sub-state parameters include the temperature sensor state, the battery cell voltage, the battery voltage change rate, the daisy chain communication state, and the voltage sampling line state, that is, the temperature sensor state machine is both a basic state parameter and a sub-state parameter.

[0089] Optionally, step S101 may be performed in real time, or may be performed at certain time intervals, or may be performed using other strategies, so as to implement monitoring of thermal runaway of the target battery according to corresponding strategies.

[0090] Optionally, in another embodiment of the present application, a specific implementation of step S101 includes:

[0091] If the vehicle is not in a dormant state, the state parameters of the target battery of the current vehicle are detected in real time to see whether they meet any preset warning state combination conditions.

[0092] If the vehicle is in a dormant state, the battery management system is awakened at each preset interval corresponding to the current number of detections to detect whether the state parameters of the target battery of the current vehicle meet any preset warning state combination conditions.

[0093] The current number of detections is the number of detections that have been performed since the vehicle entered the dormant state.

[0094] It should be noted that after executing step S101, the subsequent steps need to be executed accordingly, so that is to say, in the embodiment of the present application, when the vehicle is running, it is necessary to perform thermal runaway detection in real time to ensure the personal and property safety of the vehicle passengers. When the vehicle is in a dormant state, in order to reduce energy consumption, in the embodiment of the present application, inspections will be carried out at certain preset time intervals. Since the vehicle has just entered dormancy and the vehicle has just finished running, the probability of thermal runaway of the battery is relatively large. After the subsequent vehicle cools down for a long time, the probability of thermal runaway is small. As the number of detected times increases, it also means that the time to enter dormancy is constantly increasing. Therefore, in the embodiment of the present application, the corresponding interval time is set according to the number of detected times, so that as the number of detections continues to increase, the interval time of the detection can be increased, thereby reducing energy consumption.

[0095] Optionally, in another embodiment of the present application, at each preset interval corresponding to the current number of detections, a specific implementation of waking up the battery management system to detect whether the state parameters of the target battery of the current vehicle meet any preset warning state combination condition, that is, a specific implementation of the inspection, includes:

[0096] After the vehicle goes into sleep mode, the internal timer starts timing. At 20 minutes after the first sleep mode, the battery management system BMS performs the first wake-up inspection. If there is no abnormality, it means that the target battery has thermal runaway and enters sleep mode, and the inspection counter accumulates the number of times. Subsequently, the second and third inspections are performed every 20 minutes. After the third inspection, the fourth inspection can be performed after an interval of 60 minutes. The fifth inspection is performed 120 minutes after the last sleep wake-up, the sixth inspection is performed 240 minutes after the last sleep wake-up, the seventh inspection is performed 12 hours after the last sleep wake-up, and the eighth inspection is performed 24 hours after the last sleep wake-up. When the number of inspections is greater than eight times, an inspection is performed every 24 hours. If the vehicle ends its sleep mode and enters a normal operating state, both the timer and the inspection counter need to be initialized so that data can be recorded next time.

[0097] Optionally, in the embodiment of the present application, a specific implementation of step S101 is as follows: Figure 2 As shown, including:

[0098] S201. Detect whether a state parameter of a target battery of the current vehicle satisfies a warning condition of any basic state parameter.

[0099] In order to reduce resource consumption and improve detection efficiency, in the embodiment of the present application, each basic state parameter is first detected to see if it meets its warning condition. When the warning condition is met, the sub-state parameter corresponding to the basic state parameter is detected, and only the sub-state parameter corresponding to the basic state parameter that meets the warning condition is detected. Therefore, when it is detected that the state parameter of the target battery of the current vehicle meets the warning condition of any basic state parameter, step S202 is executed.

[0100] Specifically, in the embodiment of the present application, the warning condition for the maximum battery temperature is that the maximum battery temperature is higher than a first preset temperature and lasts for a first preset time. For example, the maximum battery temperature may be higher than 68 degrees and lasts for 2 seconds.

[0101] The warning condition for the battery temperature rise rate is that the rising rate of the maximum temperature of the target battery is greater than a preset rate, for example, the maximum temperature of the battery may rise by no less than 2 degrees within 2 seconds.

[0102] The warning condition for the maximum battery temperature difference is that the maximum battery temperature difference is higher than the second preset temperature and lasts for a second preset time, for example, the maximum battery temperature difference is higher than 15 degrees and lasts for more than 2 seconds.

[0103] The warning condition of the temperature sensor status is the failure of the temperature sensor, which may specifically include failure states such as the collected temperature exceeding the range, open circuit, and broken circuit.

[0104] S202: Detect whether the state parameter of the target battery of the current vehicle meets the warning condition of any sub-state parameter corresponding to the target basic state parameter.

[0105] Among them, the target basic state parameters are the basic state parameters that currently meet their warning conditions.

[0106] If it is detected that the state parameter of the target battery of the current vehicle meets the warning condition of any sub-state parameter corresponding to the target basic state parameter, step S203 is executed.

[0107] S203: Determine whether the state parameter of the target battery of the current vehicle satisfies any preset warning state combination condition.

[0108] Optionally, since when thermal runaway occurs and the maximum temperature of the battery is abnormal, it usually causes each sub-state parameter to be abnormal. Therefore, when the maximum temperature of the battery is abnormal, by further judging whether each sub-state parameter is abnormal, it can be determined whether the battery has thermal runaway. Therefore, in the embodiment of the present application, the sub-state parameter corresponding to the maximum temperature of the battery includes all sub-state parameters, so there are a total of 5 warning state combination conditions with the maximum temperature of the battery as the basic state parameter. Similarly, since when thermal runaway occurs and the temperature rise rate of the battery is abnormal, it usually causes the remaining sub-state parameters except the daisy chain communication to be abnormal. Therefore, the sub-state parameter corresponding to the battery temperature rise rate includes each sub-state parameter except the daisy chain communication state, so there are 4 warning state combination conditions related to the battery temperature rise rate. Based on the same principle, the sub-state parameters corresponding to the maximum temperature difference of the battery include the battery cell voltage, the battery voltage change rate, and the daisy chain communication state. The sub-state parameters corresponding to the temperature sensor state include the battery cell voltage and the battery voltage change rate.

[0109] Specifically, in the embodiment of the present application, the warning condition of the battery cell voltage is that the cell voltage is less than a preset voltage and lasts for a third preset time, for example, the cell voltage may be less than 1.5V and lasts for more than 3 seconds.

[0110] The warning condition of the battery voltage change rate is that the voltage of any battery cell drops by more than a preset drop ratio within a fourth preset time, for example, the voltage of any battery cell drops by more than 25% within 3 seconds of lighting a cigarette.

[0111] The warning condition of the daisy chain communication status is that the daisy chain communication is disconnected.

[0112] The warning condition for the voltage sampling line status is a disconnection fault in the sampling line.

[0113] S102: Determine whether thermal runaway occurs in the target battery.

[0114] S103: Determine whether the vehicle is in a dormant state.

[0115] When the vehicle is in a dormant state, it is parked and no one is using it, while when the vehicle is not in a dormant state, it is in operation and there are people on board, so different disposal methods are needed to ensure the personal and property safety of the people.

[0116] If the current vehicle is in a dormant state, step S104 is executed. If the current vehicle is in a non-dormant state, step S105 is executed.

[0117] S104. Report thermal runaway fault information.

[0118] Although the vehicle is currently in a dormant state, in order to prevent people from using the vehicle or approaching the vehicle, and to enable timely intervention and processing, it is necessary to report thermal runaway fault information to inform relevant personnel that the vehicle's battery has experienced thermal runaway.

[0119] S105: Control the vehicle to perform vehicle evacuation warning processing and report thermal runaway fault information.

[0120] Since there are people in the vehicle at this time, it is necessary not only to report the thermal runaway fault information to let the owner know that the vehicle's battery has experienced thermal runaway, but also to perform vehicle evacuation alarm processing to inform the people in the vehicle to evacuate the vehicle.

[0121] Optionally, in another embodiment of the present application, a specific implementation of step S105 is as follows: Figure 3 As shown, including:

[0122] S301. Send thermal runaway fault information to the vehicle controller, so as to upload the thermal runaway fault information to the cloud data platform through the vehicle controller.

[0123] Among them, the thermal runaway fault information may include information prompting the current thermal runaway fault, as well as information on the combination of warning status conditions that trigger thermal runaway, which not only makes it easy to know that the battery has thermal runaway, but also facilitates locating and analyzing the cause based on the information provided.

[0124] S302, controlling the vehicle's horn sound module, light combination module, instrument display module, and voice control module through the vehicle controller to prompt the person to leave the vehicle.

[0125] S303, controlling the door control module to enter an unlocking state through the vehicle controller, and controlling the anti-theft control module to stop monitoring.

[0126] In order to prevent the car doors from being locked and the occupants from being unable to evacuate the vehicle, in an embodiment of the present application, the door control module is controlled to enter an unlocked state, and the anti-theft control module is controlled to stop monitoring to prevent the anti-theft mechanism from triggering and locking the car doors.

[0127] It should be noted that step S301, step S302, and step S303 can be executed simultaneously.

[0128] S106: Determine whether the high-voltage relay of the target battery of the vehicle is in a closed state.

[0129] Since the target battery of the vehicle has thermal runaway at this time, it is necessary to put the high-voltage relay into a closed state in time to prevent the thermal runaway from becoming serious, so it is necessary to first determine whether the high-voltage relay of the target battery of the vehicle is in a closed state. If it is determined that the high-voltage relay of the target battery of the vehicle is in a closed state, step S107 is executed. If the high-voltage relay of the target battery of the vehicle is not in a closed state, the vehicle is usually parked at this time, so it is only necessary to continue to warn.

[0130] It should be noted that step S105 and step S106 can be executed simultaneously.

[0131] S107: Determine whether the speed of the vehicle is less than a preset speed.

[0132] Since the high-voltage relay of the target battery of the vehicle is not in a closed state at this time, it means that the vehicle is still in a driving state. If the speed of the vehicle is low, that is, it is equivalent to being close to parking, for example, when it is less than 2KM / h, it means that the vehicle has driven to a safe area to park, so the high-voltage relay of the target battery can be directly disconnected, that is, when it is judged that the speed of the vehicle is less than the preset speed, step S109 is directly executed. If it is judged that the speed of the vehicle is not less than the preset speed, it means that the vehicle is still in a fast driving process, so a certain amount of power is required to stop, so the high-voltage relay cannot be directly disconnected, so step S108 is executed at this time.

[0133] S108. Reduce the allowed power of the vehicle to zero at a rate corresponding to the current allowed power of the vehicle, and immediately limit the allowed feedback power of the vehicle to zero.

[0134] Since the existence of feedback power is equivalent to allowing the battery to be recharged, and thermal runaway already exists at this time, charging the battery may cause the fault to be more serious, so the permissible feedback power is immediately limited to 0KW. Considering that the vehicle still needs a certain amount of power to drive the vehicle to a safe area, the required permissible power cannot be directly reduced to 0, but according to the current permissible power of the vehicle, the permissible power of the vehicle is reduced to zero at a corresponding rate, so as to ensure that the vehicle can be safely parked, and the permissible power is reduced to zero in the shortest possible time, so as to further cut off the high-voltage relay of the target battery. So after the permissible power of the vehicle is reduced to zero, step S109 is executed.

[0135] Since the vehicle's allowable power determines the vehicle's output power, that is, determines the vehicle's speed, and thus determines the time required for the vehicle to safely dock. Therefore, the time required to ensure safe docking under different initial allowable powers can be determined through experiments, and then the required speed is calculated based on the required time, and then the power required for each time is determined based on the required speed, thereby determining the rate at which the allowable power decreases. Therefore, the corresponding rate can be determined according to the vehicle's current allowable power, and the vehicle's allowable power can be reduced according to the rate. Among them, since the current allowable power is greater, the power of the vehicle is stronger and it can dock faster, so the corresponding rate is also relatively fast.

[0136] Optionally, in order to make a judgment as quickly as possible and reduce the allowed power to 0 in time, in another embodiment of the present application, before executing step S108, the following may be further performed:

[0137] Determine whether the remaining power of the target battery is greater than a preset power ratio.

[0138] Among them, since the larger the remaining power SOC of the target battery is, the larger its current allowable power is, the faster the vehicle speed is, and the vehicle can also park by relying on inertia. Therefore, if it is determined that the remaining power of the target battery is greater than the preset power ratio, for example, greater than 20%, the allowable feedback power of the vehicle is immediately limited to zero, and the allowable power of the vehicle is controlled to be linearly reduced to zero within the fifth preset time.

[0139] If it is determined that the remaining power of the target battery is not greater than the preset power ratio, it means that the current allowable power may be relatively small, so step S108 is executed.

[0140] Optionally, since the vehicle's allowable power is large at this time, the vehicle can usually be safely parked within 60 seconds, so the fifth preset time can be set to 60 seconds, thereby ensuring that the vehicle has sufficient power to park safely and can reduce the allowable power to zero in time.

[0141] Optionally, in another embodiment of the present application, a specific implementation of step S108 is as follows: Figure 4 As shown, including:

[0142] S401. Determine whether the current permissible power of the vehicle is less than a first preset power.

[0143] Wherein, the first preset power is a relatively large power, for example, specifically can be 15KW. Therefore, when driving at this power, the vehicle can be ensured to be safely parked by reducing the allowed power at a relatively fast rate, and the allowed power can be reduced to 0 at the fastest speed. Therefore, if it is judged that the current allowed power of the vehicle is not less than the first preset power, step S402 is executed. If it is judged that the current allowed power of the vehicle is less than the first preset power, it means that the current allowed power is small and cannot be quickly reduced, and further processing is required according to the specific size of the current allowed power, so step S403 is executed at this time.

[0144] S402: Immediately limit the permissible regenerative power of the vehicle to zero, and control the permissible power of the vehicle to decrease linearly to zero within a sixth preset time.

[0145] Optionally, the permissible regenerative power of the vehicle may be immediately limited to zero, and the permissible power of the vehicle may be controlled to decrease linearly to zero within 60 seconds.

[0146] Since the current permissible power is relatively large, that is, consistent with the situation where the SOC is greater than 20%, setting the sixth preset time consistent with the fifth preset time can ensure that the vehicle can park safely and reduce the required power to zero in time.

[0147] S403: Determine whether the current permissible power of the vehicle is less than a second preset power.

[0148] Among them, the second preset power is less than the first preset power, which is a relatively large power, for example, it can be 10KW. Therefore, it is necessary to slowly reduce the allowable power at this time to allow the vehicle to have enough power to dock, so if it is determined that the current allowable power of the vehicle is not less than the second preset power, step S404 is executed. If it is determined that the current allowable power of the vehicle is less than the second preset power, it means that the current allowable power is small and cannot be reduced any further, otherwise it cannot be guaranteed that the vehicle has enough power to dock, so step S405 needs to be executed at this time.

[0149] S404: immediately limit the permissible regenerative power of the vehicle to zero, and control the permissible power of the vehicle to linearly decrease to the second preset power within a seventh preset time, and then control the permissible power of the vehicle to immediately decrease to zero.

[0150] Optionally, the allowable regenerative power of the vehicle may be immediately limited to zero, and the allowable power of the vehicle may be controlled to linearly decrease to 10KW within 50 seconds, and then the allowable power of the vehicle may be immediately controlled to decrease to zero.

[0151] Since the current power is less than the first preset power, and only the allowable power needs to be controlled to be reduced to the second preset power, the reduced power is reduced, so the required time also needs to be reduced accordingly, so the seventh preset time is smaller than the sixth preset time. In addition, since the power is smaller at this time, it is necessary to ensure that the rate of reducing the second preset power within the seventh preset time is smaller than the rate of reducing to zero within the sixth preset time, so as to ensure that there is enough power to allow the vehicle to park safely.

[0152] S405: immediately limit the permissible regenerative power of the vehicle to zero, and control the permissible power of the vehicle to remain at the current permissible power of the vehicle for an eighth preset time, and then set the permissible power of the vehicle to zero.

[0153] Since the power is relatively small at this time, in order to ensure that the vehicle can dock quickly, the permitted power of the vehicle is controlled to remain below the current permitted power of the vehicle for a period of time. Optionally, since there is enough time to dock within 60 seconds when the power is less than the second preset power, the eighth preset time can be set to 60 seconds.

[0154] Optionally, the vehicle's permissible regenerative power may be immediately limited to zero, and the vehicle's permissible power may be controlled to remain at the vehicle's current permissible power for 60 seconds, and then the vehicle's permissible power may be set to zero.

[0155] S109. Control the vehicle to disconnect the high-voltage relay of the target battery.

[0156] The embodiment of the present application provides a battery thermal runaway processing method, which detects whether the state parameters of the target battery of the current vehicle meet any preset warning state combination conditions. Among them, the warning state combination conditions include a warning condition of a basic state parameter and a warning condition of a corresponding sub-state parameter. The basic state parameters include the maximum temperature of the battery, the temperature rise rate of the battery, the maximum temperature difference of the battery, and the temperature sensor state. The sub-state parameters include the temperature sensor state, the battery cell voltage, the battery voltage change rate, the daisy chain communication state, and the voltage sampling line state. When it is judged that the basic state parameter is abnormal, it is further judged by the corresponding sub-state parameter, that is, it is further determined that when the sub-state parameter is also abnormal, it is determined that thermal runaway occurs, so that the thermal runaway anomaly occurring in various situations can be accurately judged. Therefore, if it is detected that the state parameters of the target battery of the current vehicle meet any warning state combination conditions, it is determined that the target battery has thermal runaway. And when the current vehicle is in a dormant state, the thermal runaway fault information is reported to inform the user that the battery has thermal runaway. When the vehicle is in a non-dormant state, the vehicle is controlled to perform vehicle evacuation alarm processing and report thermal runaway fault information, so that the people in the vehicle can evacuate the vehicle in time and understand the thermal runaway situation. In addition, if the high-voltage relay of the target battery of the vehicle is in a closed state, it is determined whether the speed of the vehicle is less than the preset speed. If the speed of the vehicle is less than the preset speed, the vehicle is controlled to disconnect the high-voltage relay of the target battery. If the speed of the vehicle is not less than the preset speed, the allowable power of the vehicle is reduced to zero at a rate corresponding to the current allowable power of the vehicle, and the allowable feedback power of the vehicle is immediately limited to zero. Finally, the vehicle is controlled to disconnect the high-voltage relay of the target battery, thereby ensuring that the vehicle has sufficient power to park safely, and the allowable power is reduced as soon as possible to avoid further aggravation of thermal runaway, thereby effectively ensuring the personal and property safety of personnel.

[0157] Another embodiment of the present application provides a battery thermal runaway processing device, such as Figure 5 As shown, including:

[0158] The detection unit 501 is used to detect whether the state parameters of the target battery of the current vehicle meet any preset warning state combination conditions.

[0159] Among them, the warning state combination condition includes a warning condition of a basic state parameter and a corresponding warning condition of a sub-state parameter. The basic state parameters include the maximum battery temperature, the battery temperature rise rate, the maximum battery temperature difference, and the temperature sensor state. The sub-state parameters include the temperature sensor state, the battery cell voltage, the battery voltage change rate, the daisy chain communication state, and the voltage sampling line state.

[0160] The result determination unit 502 is used to determine that the target battery has thermal runaway when it is detected that the state parameters of the target battery of the current vehicle meet any one of the warning state combination conditions.

[0161] The first reporting unit 503 is used to report thermal runaway fault information when the current vehicle is in a dormant state.

[0162] The alarm unit 504 is used to control the vehicle to perform vehicle evacuation alarm processing and report thermal runaway fault information when the vehicle is in a non-dormant state.

[0163] The speed determination unit 505 is used to determine whether the speed of the vehicle is less than a preset speed when the high-voltage relay of the target battery of the vehicle is in a closed state.

[0164] The power control unit 506 is used to reduce the vehicle's allowable power to zero at a rate corresponding to the vehicle's current allowable power when the vehicle's speed is not less than a preset speed, and to immediately limit the vehicle's allowable feedback power to zero.

[0165] The disconnection unit 507 is used to control the vehicle to disconnect the high-voltage relay of the target battery when the speed of the vehicle is less than a preset speed and the allowable power of the vehicle has dropped to zero.

[0166] Optionally, in a battery thermal runaway processing device provided in another embodiment of the present application, the detection unit includes:

[0167] The real-time detection unit is used to detect in real time whether the state parameters of the target battery of the current vehicle meet any preset warning state combination conditions when the vehicle is in a non-sleeping state.

[0168] The inspection unit is used to wake up the battery management system to detect whether the state parameters of the target battery of the current vehicle meet any preset warning state combination conditions at every preset interval corresponding to the current number of detections when the vehicle is in a dormant state. The current number of detections is the number of detections that have been performed since the vehicle entered the dormant state.

[0169] Optionally, in a battery thermal runaway processing device provided in another embodiment of the present application, the detection unit includes:

[0170] The basic inspection unit is used to detect whether the state parameters of the target battery of the current vehicle meet the warning conditions of any basic state parameters.

[0171] Among them, the warning condition for the maximum battery temperature is that the maximum battery temperature is higher than the first preset temperature and lasts for the first preset time. The warning condition for the battery temperature rise rate is that the rate of increase of the maximum temperature of the target battery is greater than the preset rate. The warning condition for the maximum battery temperature difference is that the maximum battery temperature difference is higher than the second preset temperature and lasts for the second preset time. The warning condition for the temperature sensor status is that the temperature sensor fails.

[0172] The secondary detection unit is used to detect whether the state parameter of the target battery of the current vehicle meets the warning condition of any sub-state parameter corresponding to the target basic state parameter when it is detected that the state parameter of the target battery of the current vehicle meets the warning condition of any basic state parameter. The target basic state parameter is the basic state parameter that currently meets its warning condition.

[0173] Optionally, in a battery thermal runaway processing device provided in another embodiment of the present application, the sub-state parameters corresponding to the maximum battery temperature include all sub-state parameters. The sub-state parameters corresponding to the battery temperature rise rate include all sub-state parameters except the daisy chain communication state. The sub-state parameters corresponding to the maximum battery temperature difference include the battery cell voltage, the battery voltage change rate, and the daisy chain communication state. The sub-state parameters corresponding to the temperature sensor state include the battery cell voltage and the battery voltage change rate.

[0174] Among them, the warning condition for the battery cell voltage is that the cell voltage is less than the preset voltage and lasts for the third preset time. The warning condition for the battery voltage change rate is that the voltage of any battery cell drops by more than the preset drop ratio within the fourth preset time. The warning condition for the daisy chain communication status is that the daisy chain communication is disconnected. The warning condition for the voltage sampling line status is that the sampling line is disconnected.

[0175] Optionally, in a battery thermal runaway processing device provided in another embodiment of the present application, the alarm unit includes:

[0176] The second reporting unit is used to send the thermal runaway fault information to the vehicle controller, so as to upload the thermal runaway fault information to the cloud data platform through the vehicle controller.

[0177] The prompt unit is used to control the vehicle's horn sound module, light combination module, instrument display module, and voice control module through the vehicle controller to prompt people to leave the vehicle.

[0178] The release unit is used to control the door control module to enter the unlocking state through the vehicle controller, and control the anti-theft control module to stop monitoring.

[0179] Optionally, in another embodiment of the present application, the battery thermal runaway processing device further includes:

[0180] The power determination unit is used to determine whether the remaining power of the target battery is greater than a preset power ratio.

[0181] Among them, if it is determined that the remaining power of the target battery is not greater than the preset power ratio, the power control unit executes to reduce the vehicle's allowable power to zero at a rate corresponding to the vehicle's current allowable power, and immediately limits the vehicle's allowable feedback power to zero.

[0182] The first control unit is used to immediately limit the allowable regenerative power of the vehicle to zero when it is determined that the remaining power of the target battery is greater than a preset power ratio, and control the allowable power of the vehicle to be linearly reduced to zero within a fifth preset time.

[0183] Optionally, in a battery thermal runaway processing device provided in another embodiment of the present application, a power control unit includes:

[0184] The first judgment unit is used to judge whether the current allowable power of the vehicle is less than a first preset power.

[0185] The second control unit is used to immediately limit the allowable feedback power of the vehicle to zero when it is determined that the current allowable power of the vehicle is not less than the first preset power, and control the allowable power of the vehicle to be linearly reduced to zero within a sixth preset time.

[0186] The second judgment unit is used to judge whether the current allowable power of the vehicle is less than the second preset power when judging that the current allowable power of the vehicle is less than the first preset power. The second preset power is less than the first preset power.

[0187] The third control unit is used to immediately limit the allowable feedback power of the vehicle to zero when it is determined that the current allowable power of the vehicle is not less than the second preset power, and control the allowable power of the vehicle to be linearly reduced to the second preset power within a seventh preset time, and then control the allowable power of the vehicle to be immediately reduced to zero.

[0188] The fourth control unit is used to immediately limit the vehicle's allowable feedback power to zero when it is determined that the vehicle's current allowable power is less than the second preset power, and control the vehicle's allowable power to remain at the vehicle's current allowable power for an eighth preset time, and then set the vehicle's allowable power to zero.

[0189] It should be noted that the specific working process of each unit provided in the above embodiments of the present application can refer to the implementation process of the corresponding steps in the above method embodiments, and will not be repeated here.

[0190] Another embodiment of the present application provides an electronic device, such as Figure 6 As shown, including:

[0191] Memory 601 and processor 602 .

[0192] The memory 601 is used to store programs.

[0193] The processor 602 is used to execute the program stored in the memory 601. When the program is executed, it is specifically used to implement the battery thermal runaway processing method provided in any one of the above embodiments.

[0194] Another embodiment of the present application provides a computer storage medium for storing a computer program. When the computer program is executed, it is used to implement the battery thermal runaway processing method provided in any one of the above embodiments.

[0195] Computer storage media includes permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include temporary computer-readable media (transitory media), such as modulated data signals and carrier waves.

[0196] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0197] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for handling battery thermal runaway, characterized in that: include: Detect whether the state parameters of the target battery of the current vehicle meet any preset warning state combination conditions; wherein the warning state combination conditions include a warning condition of a basic state parameter and a warning condition of a corresponding sub-state parameter; the basic state parameters include the maximum temperature of the battery, the battery temperature rise rate, the maximum temperature difference of the battery, and the temperature sensor state; the sub-state parameters include the temperature sensor state, the battery cell voltage, the battery voltage change rate, the daisy chain communication state, and the voltage sampling line state; If it is detected that the state parameter of the target battery of the current vehicle meets any one of the warning state combination conditions, it is determined that the target battery has thermal runaway; If the vehicle is currently in a dormant state, thermal runaway fault information is reported; If the vehicle is in a non-dormant state, controlling the vehicle to perform vehicle evacuation warning processing and report thermal runaway fault information; If the high-voltage relay of the target battery of the vehicle is in a closed state, determining whether the speed of the vehicle is less than a preset speed; If the speed of the vehicle is less than a preset speed, controlling the vehicle to disconnect the high-voltage relay of the target battery; If the speed of the vehicle is not less than a preset speed, reducing the allowable power of the vehicle to zero at a rate corresponding to the current allowable power of the vehicle, and immediately limiting the allowable regenerative power of the vehicle to zero; The vehicle is controlled to disconnect a high voltage relay of the target battery.

2. The method according to claim 1, characterized in that The detecting whether the state parameter of the target battery of the current vehicle satisfies any preset warning state combination condition includes: If the vehicle is not in a dormant state, real-time detection of whether the state parameters of the target battery of the vehicle currently meet any of the preset warning state combination conditions; If the vehicle is in a dormant state, the battery management system is awakened at each preset interval corresponding to the current number of detections to detect whether the state parameters of the target battery of the current vehicle meet any preset combination of the warning states; wherein the current number of detections is the number of detections that have been performed since the vehicle entered the dormant state.

3. The method according to claim 1, characterized in that: The detecting whether the state parameter of the target battery of the current vehicle satisfies any preset warning state combination condition includes: Detecting whether a state parameter of a target battery of the vehicle currently meets a warning condition of any of the basic state parameters; Among them, the warning condition of the maximum battery temperature is that the maximum battery temperature is higher than the first preset temperature and lasts for a first preset time; the warning condition of the battery temperature rise rate is that the rise rate of the maximum temperature of the target battery is greater than the preset rate; the warning condition of the maximum battery temperature difference is that the maximum battery temperature difference is higher than the second preset temperature and lasts for a second preset time; the warning condition of the temperature sensor state is that the temperature sensor fails; If it is detected that the state parameters of the target battery of the current vehicle meet the warning conditions of any one of the basic state parameters, then it is detected whether the state parameters of the target battery of the current vehicle meet the warning conditions of any one of the sub-state parameters corresponding to the target basic state parameters; wherein the target basic state parameters are the basic state parameters that currently meet their warning conditions.

4. The method according to any one of claims 1 or 3, characterized in that: The sub-state parameters corresponding to the maximum battery temperature include all the sub-state parameters; the sub-state parameters corresponding to the battery temperature rise rate include all the sub-state parameters except the daisy chain communication state; the sub-state parameters corresponding to the maximum battery temperature difference include the battery cell voltage, the battery voltage change rate, and the daisy chain communication state; the sub-state parameters corresponding to the temperature sensor state include the battery cell voltage and the battery voltage change rate; Among them, the warning condition for the battery cell voltage is that the cell voltage is less than the preset voltage and lasts for the third preset time; the warning condition for the battery voltage change rate is that the voltage of any battery cell decreases by more than a preset decrease ratio within the fourth preset time; the warning condition for the daisy chain communication status is that the daisy chain communication is disconnected; the warning condition for the voltage sampling line status is that the sampling line has a disconnection fault.

5. The method according to claim 1, characterized in that The controlling the vehicle to perform vehicle evacuation warning processing and report thermal runaway fault information includes: Sending the thermal runaway fault information to a vehicle controller, so as to upload the thermal runaway fault information to a cloud data platform through the vehicle controller; The vehicle controller controls the horn sound module, the light combination module, the instrument display module, and the voice control module of the vehicle to prompt the person to leave the vehicle; The vehicle controller controls the door control module to enter an unlocked state, and controls the anti-theft control module to stop monitoring.

6. The method according to claim 1, characterized in that Before reducing the allowed power of the vehicle to zero at a rate corresponding to the current allowed power of the vehicle and immediately limiting the allowed regenerative power of the vehicle to zero, the method further includes: Determining whether the remaining power of the target battery is greater than a preset power ratio; If it is determined that the remaining power of the target battery is not greater than the preset power ratio, the vehicle's allowable power is reduced to zero at a rate corresponding to the vehicle's current allowable power, and the vehicle's allowable regenerative power is immediately limited to zero; If it is determined that the remaining power of the target battery is greater than the preset power ratio, the allowable regenerative power of the vehicle is immediately limited to zero, and the allowable power of the vehicle is controlled to be linearly reduced to zero within a fifth preset time.

7. The method according to claim 1, characterized in that The reducing the allowed power of the vehicle to zero at a rate corresponding to the current allowed power of the vehicle, and immediately limiting the allowed regenerative power of the vehicle to zero, comprises: Determining whether the current permissible power of the vehicle is less than a first preset power; If it is determined that the current allowable power of the vehicle is not less than the first preset power, the allowable feedback power of the vehicle is immediately limited to zero, and the allowable power of the vehicle is controlled to be linearly reduced to zero within a sixth preset time; If it is determined that the current allowable power of the vehicle is less than the first preset power, then determining whether the current allowable power of the vehicle is less than the second preset power; wherein the second preset power is less than the first preset power; If it is determined that the current allowable power of the vehicle is not less than the second preset power, the allowable feedback power of the vehicle is immediately limited to zero, and the allowable power of the vehicle is controlled to be linearly reduced to the second preset power within a seventh preset time, and then the allowable power of the vehicle is controlled to be immediately reduced to zero; If it is determined that the current allowable power of the vehicle is less than the second preset power, the allowable feedback power of the vehicle is immediately limited to zero, and the allowable power of the vehicle is controlled to remain at the current allowable power of the vehicle for an eighth preset time, and then the allowable power of the vehicle is set to zero.

8. A battery thermal runaway processing device, characterized in that: include: A detection unit, used to detect whether the state parameters of the target battery of the current vehicle meet any preset warning state combination condition; wherein the warning state combination condition includes a warning condition of a basic state parameter and a warning condition of a corresponding sub-state parameter; the basic state parameter includes the maximum temperature of the battery, the battery temperature rise rate, the maximum temperature difference of the battery, and the temperature sensor state; the sub-state parameter includes the temperature sensor state, the battery cell voltage, the battery voltage change rate, the daisy chain communication state, and the voltage sampling line state; A result determination unit, configured to determine that thermal runaway occurs in the target battery when it is detected that the state parameter of the target battery of the current vehicle satisfies any one of the warning state combination conditions; A first reporting unit, used for reporting thermal runaway fault information when the vehicle is in a dormant state; an alarm unit, used to control the vehicle to perform vehicle evacuation alarm processing and report thermal runaway fault information when the vehicle is in a non-dormant state; a speed determination unit, configured to determine whether the speed of the vehicle is less than a preset speed when the high-voltage relay of the target battery of the vehicle is in a closed state; a power control unit, configured to reduce the allowable power of the vehicle to zero at a rate corresponding to the current allowable power of the vehicle and immediately limit the allowable regenerative power of the vehicle to zero when the speed of the vehicle is not less than a preset speed; A disconnection unit is used to control the vehicle to disconnect the high-voltage relay of the target battery when the speed of the vehicle is less than a preset speed and the allowable power of the vehicle has dropped to zero.

9. An electronic device, characterized in that: include: Memory and processor; Wherein, the memory is used to store programs; The processor is used to execute the program, and when the program is executed, it is specifically used to implement the battery thermal runaway processing method according to any one of claims 1 to 7.

10. A computer storage medium, characterized in that: Used to store a computer program, which, when executed, is used to implement the battery thermal runaway processing method according to any one of claims 1 to 7.

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