Battery fire control method, system, device and computer readable storage medium

Abstract

The application discloses a battery fire control method, system, device and computer readable storage medium, and relates to the technical field of battery safety, and specifically comprises the following steps: acquiring a vertical acceleration, a roll angle, a roll angle change amount and a battery pack temperature; when it is detected that a target vehicle is in a collision state, it is judged whether the target vehicle is in a roll state or a falling state based on the vertical acceleration, the roll angle and the roll angle change amount; if yes, a point explosion gas generating device is controlled to prevent the battery from catching fire; and if no, a point explosion state of the gas generating device is controlled based on the battery pack temperature, wherein the point explosion state comprises point explosion and no point explosion. The application can avoid battery fire in the case that the whole vehicle is powered off or the circuit is faulty after a collision.

Description

Technical Field

[0001] This application relates to the field of battery safety technology, specifically to a method, system, device, and computer-readable storage medium for controlling battery fire. Background Technology

[0002] With the rapid development of new energy vehicle technology, battery thermal management systems and safety protection measures have become crucial to ensuring the safety performance of electric vehicles. Currently, new energy vehicles are generally equipped with battery thermal management systems, which use air conditioning and other means to monitor and control the battery in real time to prevent overheating, and use casing designs to effectively isolate the battery from the air to reduce the risk of fire or thermal runaway.

[0003] However, existing technologies have some technical shortcomings in collision or drop accidents. Specifically, when a vehicle is involved in a collision or drop accident, power outages or equipment damage may occur, causing the pre-set battery cooling system to malfunction. At the same time, collision damage can also compromise the battery pack's seal, causing the protection that isolates the battery from the air to fail, increasing the risk of thermal runaway and fire.

[0004] Therefore, how to prevent battery fires in the event of a vehicle power outage or circuit failure after a collision is an urgent problem that needs to be solved. Summary of the Invention

[0005] This application provides a method, system, device, and computer-readable storage medium for controlling battery fires, which can prevent battery fires in the event of a power outage or circuit failure after a collision.

[0006] In a first aspect, embodiments of this application provide a method for controlling battery fire, the method comprising:

[0007] Obtain vertical acceleration, roll angle, roll angle change, and battery pack temperature;

[0008] When a target vehicle is detected to be in a collision state, the vertical acceleration, roll angle, and change in roll angle are used to determine whether the target vehicle is in a rollover or falling state.

[0009] If so, control the ignition gas generator to prevent the battery from catching fire;

[0010] If not, the ignition state of the gas generator is controlled based on the battery pack temperature, and the ignition state includes ignition and non-ignition.

[0011] In conjunction with the first aspect, in one implementation, determining whether the target vehicle is in a rollover or fall state based on vertical acceleration, roll angle, and change in roll angle includes:

[0012] If the roll angle is less than the preset roll angle threshold, the vertical acceleration is within the preset acceleration range, and the roll angle change is within the preset angle range, then the target vehicle is determined to be in a rollover state.

[0013] If the roll angle is not less than the preset roll angle threshold, or the vertical acceleration is not within the preset acceleration range, or the change in roll angle is not within the preset angle range, then the target vehicle is determined not to be in a rollover state.

[0014] If the vertical acceleration is greater than the preset acceleration threshold, the target vehicle is determined to be in a falling state.

[0015] If the vertical acceleration is not greater than the preset acceleration threshold, the target vehicle is determined not to be in a falling state.

[0016] In conjunction with the first aspect, in one embodiment, the ignition state of the battery pack temperature-controlled gas generator includes:

[0017] If the battery pack temperature exceeds the preset first temperature threshold, the ignition gas generator is controlled.

[0018] If the battery pack temperature is less than or equal to a preset first temperature threshold, the non-ignition gas generator is controlled.

[0019] In conjunction with the first aspect, in one embodiment, the gas generator in the gas generating device includes a first gas generator, a second gas generator, and a third gas generator. The reaction rate of the reactants in the first gas generator is greater than the reaction rates of the reactants in the second and third gas generators, and the reaction rate of the reactants in the second gas generator is equal to the reaction rate of the reactants in the third gas generator. The step of controlling the ignition gas generating device if the battery pack temperature exceeds a preset first temperature threshold further includes:

[0020] If the battery pack temperature is greater than a preset first temperature threshold, determine whether the battery pack temperature is less than a preset second temperature threshold. If the first temperature threshold is less than the second temperature threshold.

[0021] If so, the first gas generator, the second gas generator, and the third gas generator are detonated sequentially according to the reaction rate.

[0022] If not, then simultaneously detonate the first gas generator, the second gas generator, and the third gas generator.

[0023] In conjunction with the first aspect, in one embodiment, the step of sequentially detonating the first gas generator, the second gas generator, and the third gas generator according to their reaction rates includes:

[0024] Detonate the first gas generator to release inert gas;

[0025] After a preset first time period following the ignition of the first gas generator, the second gas generator is controlled to ignite.

[0026] After the second gas generator is ignited for a preset second time, the third gas generator is controlled to ignite to continuously release inert gas.

[0027] In conjunction with the first aspect, in one embodiment, the gas generating device is arranged at a predetermined distance from the battery pack so that the inert gas in the gas generating device after ignition covers the battery pack.

[0028] Secondly, embodiments of this application provide a battery fire control system, the battery fire control system comprising:

[0029] The first processing module is used to acquire vertical acceleration, roll angle, roll angle change, and battery pack temperature.

[0030] The second processing module is used to determine whether the target vehicle is in a rollover or fall state based on vertical acceleration, roll angle, and change in roll angle when the target vehicle is detected to be in a collision state.

[0031] The third processing module is used to control the ignition gas generator if the condition is met, in order to prevent the battery from catching fire.

[0032] The fourth processing module is used to control the ignition state of the gas generator based on the battery pack temperature if no, the ignition state including ignition and non-ignition.

[0033] In conjunction with the second aspect, in one implementation, the second processing module is specifically used for:

[0034] If the roll angle is less than the preset roll angle threshold, the vertical acceleration is within the preset acceleration range, and the roll angle change is within the preset angle range, then the target vehicle is determined to be in a rollover state.

[0035] If the roll angle is not less than the preset roll angle threshold, or the vertical acceleration is not within the preset acceleration range, or the change in roll angle is not within the preset angle range, then the target vehicle is determined not to be in a rollover state.

[0036] If the vertical acceleration is greater than the preset acceleration threshold, the target vehicle is determined to be in a falling state.

[0037] If the vertical acceleration is not greater than the preset acceleration threshold, the target vehicle is determined not to be in a falling state.

[0038] Thirdly, embodiments of this application provide a battery fire control device, which includes a processor, a memory, and a battery fire control program stored in the memory and executable by the processor. When the battery fire control program is executed by the processor, it implements the steps of the battery fire control method as described in any of the preceding claims.

[0039] Fourthly, embodiments of this application provide a computer-readable storage medium storing a battery fire control program, wherein when the battery fire control program is executed by a processor, it implements the steps of the battery fire control method as described in any of the preceding claims.

[0040] The beneficial effects of the technical solutions provided in this application include:

[0041] The system acquires vertical acceleration, roll angle, roll angle change, and battery pack temperature. When a target vehicle is detected to be in a collision state, if the vertical acceleration, roll angle, and roll angle change indicate that the target vehicle is in a rollover or fall state, it suggests that the bottom of the battery may have suffered mechanical damage, increasing the risk of battery fire. However, even in the event of a vehicle electrical failure, the battery pack temperature sensor and gas generator can still operate normally through an independent backup power supply. Therefore, in this case, the gas generator can be triggered to release inert gas, allowing for emergency control of the battery pack based on the inert gas, thereby quickly reducing the risk of fire. If the vehicle is not in a rollover or fall state, it indicates that the bottom of the battery may not have suffered mechanical damage. The battery pack temperature can be used to determine whether the gas generator needs to be activated to prevent battery fire or other safety hazards caused by excessive temperature. Attached Figure Description

[0042] Figure 1 This is a flowchart illustrating an embodiment of the battery fire control method of this application;

[0043] Figure 2 This is a schematic flowchart illustrating the tilt angle determination process in an embodiment of the battery fire control method of this application.

[0044] Figure 3 This is a flowchart illustrating the determination of changes in vertical acceleration and tilt angle in an embodiment of the battery fire control method of this application.

[0045] Figure 4 This is a flowchart illustrating the determination of the target vehicle's fall state in an embodiment of the battery fire control method of this application.

[0046] Figure 5 This is a schematic diagram of the gas generating device in an embodiment of the battery fire control method of this application;

[0047] Figure 6 This is a schematic diagram showing the arrangement of the gas generating device in an embodiment of the battery fire control method of this application;

[0048] Figure 7 This is a functional module diagram of an embodiment of the battery fire control system of this application;

[0049] Figure 8 This is a schematic diagram of the hardware structure of the battery fire control device involved in the embodiments of this application. Detailed Implementation

[0050] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0051] First, some of the technical terms used in this application will be explained to help those skilled in the art understand this application.

[0052] Collision sensors: identify the vehicle's collision acceleration and maintain real-time communication and data transmission with the airbag controller.

[0053] Gas generating device: By using chemical substances (such as guanidine nitrate, a drug used to generate gas in airbags) in the ignition device, nitrogen and water vapor are rapidly generated, reducing the oxygen content in the air and suppressing ignition.

[0054] Vehicle communication network: the medium for information transmission between different control units.

[0055] Airbag controller: Collision recognition and ignition trigger control unit, receives road condition signals from the vehicle communication network, and opens or closes the rear collision function according to the signal status, while sending the rear collision function status out through the vehicle communication network.

[0056] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0057] In a first aspect, embodiments of this application provide a method for controlling battery fire.

[0058] In one embodiment, reference is made to Figure 1 , Figure 1 This is a flowchart illustrating an embodiment of the battery fire control method of this application. Figure 1 As shown, the methods for controlling battery fires include:

[0059] Step S10: Obtain vertical acceleration, roll angle, roll angle change, and battery pack temperature.

[0060] In this exemplary embodiment, a sensor system installed on the target vehicle can acquire key data such as vertical acceleration, roll angle, roll angle change, and battery pack temperature in real time. Specifically, an acceleration sensor can measure the vehicle's acceleration change along the vertical direction to determine the vertical acceleration (i.e., acceleration in the Z-axis direction), where the Z-axis is set vertically upward as positive. A roll angle sensor can detect the vehicle's tilt angle relative to the horizontal plane to determine the roll angle and roll angle change, thereby enabling further analysis of the vehicle's stability and dynamic changes during movement, which is particularly important in rollover or fall scenarios. Simultaneously, a battery pack temperature sensor can continuously monitor the battery's operating temperature to ensure timely detection of potential risks such as overheating.

[0061] It should be understood that the collaborative work of the above data provides the foundation for real-time monitoring and safety warnings. Through the cooperation of the various sensors mentioned above, the safety status of the target vehicle's battery pack can be accurately assessed, and corresponding emergency measures can be triggered.

[0062] Step S20: When the target vehicle is detected to be in a collision state, determine whether the target vehicle is in a rollover state or a fall state based on the vertical acceleration, roll angle, and change in roll angle.

[0063] As an example, in the embodiments of this application, the process of detecting that the target vehicle is in a collision state mainly relies on the coordinated operation of IMU (Inertial Measurement Unit) signals and peripheral acceleration sensor signals. The principle and implementation process are common knowledge in the field, and will not be described in detail here for the sake of brevity.

[0064] It's important to note that when a collision is detected, it indicates a potential power outage or electrical malfunction, preventing the battery cooling system from functioning properly. Collisions often involve rollovers or falls, which can subject the battery pack to external pressure or impact, leading to battery casing rupture and internal damage. This can result in overheating, temperature increases, and even fires. Since the battery cooling system is malfunctioning, a fire caused by battery safety issues is highly likely. Therefore, determining whether the vehicle is in a rollover or fall to assess battery damage is crucial in scenarios involving battery cooling system failures. This can be achieved by analyzing vertical acceleration, roll angle, and changes in roll angle.

[0065] Specifically, the system can first determine whether a target vehicle is in a rollover state based on the relationship between the roll angle and a preset roll angle threshold, whether the vertical acceleration is within a preset acceleration threshold range, and whether the change in roll angle is within a preset angle range. Simultaneously, the system can determine whether the target vehicle is in a fall state based on the relationship between the vertical acceleration and a preset acceleration threshold. It should be understood that by comprehensively analyzing real-time data on vertical acceleration, roll angle, and their changes, it is possible to accurately determine whether a target vehicle is in a rollover or fall state, thereby initiating appropriate safety measures.

[0066] Step S30: If so, control the ignition gas generator to prevent the battery from catching fire.

[0067] As an example, in the embodiments of this application, if the target vehicle is in either a rollover state or a fall state, it indicates that the bottom of the battery may have suffered mechanical damage, and the risk of battery fire increases; however, even if the vehicle circuit fails, the battery pack temperature sensor and gas generator can still work normally through an independent backup power supply. Therefore, in this case, the inert gas can be released by igniting the gas generator to perform emergency control of the battery pack based on the inert gas, thereby quickly reducing the risk of fire.

[0068] Step S40: If not, then based on the ignition state of the gas generator controlled by the battery pack temperature, the ignition state includes ignition and non-ignition.

[0069] In this embodiment of the application, the ignition state includes ignition and non-ignition. If the vehicle is not in a rollover or falling state, it indicates that the bottom of the battery may not have suffered mechanical damage. Since the possibility of the battery pack catching fire is low in the absence of mechanical damage, and the normal operation of the battery pack mainly depends on the effective control of the thermal management system, the thermal status of the battery can be judged in real time by monitoring the temperature change of the battery pack, thereby controlling the ignition state of the gas generator. Specifically, the ignition gas generator needs to be controlled based on the temperature of the battery pack to prevent battery fire or other safety hazards caused by excessive temperature.

[0070] This application acquires vertical acceleration, roll angle, roll angle change, and battery pack temperature. When a target vehicle is detected to be in a collision state, if the vertical acceleration, roll angle, and roll angle change indicate that the target vehicle is in a rollover or fall state, it suggests that the bottom of the battery may have suffered mechanical damage, increasing the risk of battery fire. However, even in the event of a fault in the vehicle's electrical system, the battery pack temperature sensor and gas generator can still operate normally through an independent backup power supply. Therefore, in this case, the gas generator can be triggered to release inert gas, allowing for emergency control of the battery pack based on the inert gas, thereby rapidly reducing the risk of fire. If the vehicle is not in a rollover or fall state, it indicates that the bottom of the battery may not have suffered mechanical damage. The battery pack temperature can be used to determine whether it is necessary to control the ignition gas generator to prevent battery fire or other safety hazards caused by excessive temperature.

[0071] Furthermore, in one embodiment, determining whether the target vehicle is in a rollover or fall state based on vertical acceleration, roll angle, and change in roll angle includes:

[0072] If the roll angle is less than the preset roll angle threshold, the vertical acceleration is within the preset acceleration range, and the roll angle change is within the preset angle range, then the target vehicle is determined to be in a rollover state.

[0073] If the roll angle is not less than the preset roll angle threshold, or the vertical acceleration is not within the preset acceleration range, or the roll angle change is not within the preset angle range, then the target vehicle is determined not to be in a rollover state.

[0074] If the vertical acceleration is greater than the preset acceleration threshold, the target vehicle is determined to be in a falling state.

[0075] If the vertical acceleration is not greater than the preset acceleration threshold, the target vehicle is determined not to be in a falling state.

[0076] As an example, in the embodiments of this application, the specific values ​​of the preset roll angle threshold, preset acceleration range, preset angle range, and preset acceleration threshold can be determined according to actual needs and are not limited here. It should be understood that before determining the rollover and fall state of the target vehicle, relevant signals need to be collected by sensors. Considering the accuracy of the sensor data, it is preferable to collect parameters such as roll angle, vertical acceleration, and roll angle change every 5ms. 60 consecutive data points constitute an interval, and each interval is treated as a group of data. When the parameters in the same group all meet the corresponding judgment logic, the count is incremented by 1 (the initial count value is 0), until the count reaches 9 or above, at which point it is determined that the roll angle, vertical acceleration, and roll angle change data are accurate.

[0077] Specifically, the roll angle, vertical acceleration, and changes in roll angle of the target vehicle can be obtained through relevant sensors, and multiple logical judgments can be made in conjunction with preset thresholds, referring to... Figure 2 , Figure 3 and Figure 4 As shown, taking a set of data as an example, if the roll angle is less than the preset roll angle threshold, it is further determined whether the vertical acceleration is within the preset acceleration range and whether the change in roll angle is within the preset angle range. If both are within the preset threshold range, it indicates that the target is undergoing a rollover or is about to enter a dangerous rollover state, and the target vehicle is determined to be in a rollover state. Conversely, if any one of the conditions is not met, it indicates that the target vehicle has not experienced abnormal rollover or violent shaking (i.e., it is in a normal driving state), and the target vehicle is determined not to be in a rollover state.

[0078] It should be noted that whether a target vehicle is in a falling state can be determined by judging whether the vertical acceleration is greater than a preset acceleration threshold. Specifically, if the vertical acceleration is greater than the preset acceleration threshold, it means that the target vehicle may have encountered a violent vertical impact or a sudden drop, causing the vertical acceleration to exceed the normal range, and the target vehicle is judged to be in a falling state; if the vertical acceleration is less than or equal to the preset acceleration threshold, it means that the vertical acceleration of the target vehicle is within the normal range and has not experienced a violent impact or a sudden drop, and the target vehicle is judged not to be in a falling state.

[0079] Understandably, the above-mentioned judgment process can effectively distinguish between rollover and fall by comparing real-time sensor data with a set threshold, ensuring accurate identification of rollover or fall events, thereby providing real-time feedback and response measures for the vehicle safety system.

[0080] Furthermore, in one embodiment, the ignition state of the gas generator based on battery pack temperature control includes:

[0081] If the battery pack temperature exceeds the preset first temperature threshold, the ignition gas generator is controlled.

[0082] If the battery pack temperature is less than or equal to a preset first temperature threshold, the non-ignition gas generator is controlled.

[0083] As an example, in the embodiments of this application, the specific value of the preset first temperature threshold can be determined according to actual needs and is not limited here; if the battery pack temperature is greater than the preset first temperature threshold, it means that the battery pack temperature has exceeded the safe operating range and there may be a risk of overheating. The system needs to take measures to reduce the temperature and protect the safety of the battery, and then controls the ignition gas generator; if the battery pack temperature is less than or equal to the preset first temperature threshold, it means that the battery pack temperature is within the safe operating range and there is no need to start the gas generator to intervene in the temperature change, and then controls the non-ignition gas generator.

[0084] Understandably, the above process monitors the battery pack temperature in real time through temperature sensors and makes intelligent adjustments based on set thresholds to ensure that the battery system operates within a safe temperature range and avoids safety hazards caused by overheating.

[0085] Further, in one embodiment, the gas generator in the gas generating device includes a first gas generator, a second gas generator, and a third gas generator. The reaction rate of the reactants in the first gas generator is greater than the reaction rates of the reactants in the second and third gas generators, and the reaction rate of the reactants in the second gas generator is equal to the reaction rate of the reactants in the third gas generator. The step of controlling the ignition gas generating device if the battery pack temperature is greater than a preset first temperature threshold also includes:

[0086] If the battery pack temperature is greater than a preset first temperature threshold, determine whether the battery pack temperature is less than a preset second temperature threshold. If the first temperature threshold is less than the second temperature threshold.

[0087] If so, the first gas generator, the second gas generator, and the third gas generator are detonated sequentially according to the reaction rate.

[0088] If not, then simultaneously detonate the first gas generator, the second gas generator, and the third gas generator.

[0089] As an example, in the embodiments of this application, the specific value of the preset second temperature threshold can be determined according to actual needs, as long as the second temperature threshold is greater than the first temperature threshold, and is not limited here; see reference. Figure 5As shown, the gas generator in the gas generating device includes a first gas generator, a second gas generator, and a third gas generator. The reaction rate of the reactants in the first gas generator is greater than the reaction rates of the reactants in the second and third gas generators, and the reaction rate of the reactants in the second gas generator is equal to the reaction rate of the reactants in the third gas generator.

[0090] Specifically, if the battery pack temperature is greater than the preset first temperature threshold, then it is necessary to determine whether the battery pack temperature is less than the preset second temperature threshold. If the battery pack temperature is less than the preset second temperature threshold, it means that the battery pack temperature is low and in a relatively safe temperature range, and excessive cooling measures may not be necessary. Therefore, the first gas generator, the second gas generator, and the third gas generator can be detonated step by step according to the reaction rate to gradually control the battery pack temperature and avoid unnecessary rapid cooling of the battery. If the battery pack temperature is greater than or equal to the preset second temperature threshold, it means that the battery pack temperature is already high, and the system needs to quickly and comprehensively reduce the temperature to prevent overheating and safety issues. In this case, the first gas generator, the second gas generator, and the third gas generator can be detonated simultaneously to achieve rapid and effective temperature control.

[0091] Understandably, the control of the above process is based on temperature sensor data, which is compared with a second temperature threshold to determine the activation mode of the gas generator, thereby ensuring that the battery pack is always within a safe and stable operating temperature range.

[0092] Further, in one embodiment, the step of sequentially detonating the first gas generator, the second gas generator, and the third gas generator according to their reaction rates includes:

[0093] Detonate the first gas generator to release inert gas;

[0094] After a preset first time period following the ignition of the first gas generator, the second gas generator is controlled to ignite.

[0095] After the second gas generator is ignited for a preset second time, the third gas generator is controlled to ignite to continuously release inert gas.

[0096] As an example, in the embodiments of this application, the specific values ​​of the preset first duration and the preset second duration can be determined according to actual needs and are not limited here; specifically, the first gas generator is first ignited to release inert gas, thereby initially reducing the temperature of the battery pack; then, after the first gas generator is ignited and continues to work for a preset first duration, the second gas generator is controlled to ignite to further release inert gas, thereby enhancing the cooling effect; subsequently, after the second gas generator is ignited and continues to work for a preset second duration, the third gas generator is triggered to continuously and comprehensively release inert gas, thereby more effectively controlling the temperature of the battery pack and thus avoiding unnecessary and drastic cooling of the battery.

[0097] Understandably, the entire process described above ensures the stability and effectiveness of the cooling measures through precise duration control and step-by-step activation of the gas generator, avoiding the negative impact of drastic temperature changes on battery performance and safety.

[0098] Furthermore, in one embodiment, the gas generating device is arranged at a predetermined distance from the battery pack so that the inert gas in the gas generating device after ignition covers the battery pack.

[0099] As an example, in the embodiments of this application, the preset distance can be determined according to the structural characteristics and temperature control requirements of the battery pack, and is not limited here. Refer to Figure 6 As shown, the intrusion of the battery pack in a side collision is greater than that in a frontal or rear collision. Therefore, placing the gas generator near the middle of the battery pack and the channel can not only increase the inert gas coverage speed, but also greatly reduce the risk of damage to the device in a collision. At the same time, this position is very close to the airbag controller, which can effectively reduce the risk of damage to related circuits at the moment of collision, thereby increasing the stability of signal transmission.

[0100] It should be understood that the proper arrangement of the gas generator at a predetermined distance from the battery pack ensures that the inert gas released by the gas generator after ignition can evenly and fully cover the entire battery pack. Specifically, through this arrangement, the gas generator can maximize the diffusivity of the gas after ignition, ensuring that the inert gas quickly penetrates every corner of the battery pack, thereby achieving comprehensive and balanced temperature control and avoiding localized overheating or uneven temperature phenomena.

[0101] Secondly, embodiments of this application also provide a control system for battery fire.

[0102] In one embodiment, reference is made to Figure 7 , Figure 7 This is a functional block diagram of an embodiment of the battery fire control system of this application. Figure 7 As shown, the battery fire control system includes:

[0103] The first processing module is used to acquire vertical acceleration, roll angle, roll angle change, and battery pack temperature.

[0104] The second processing module is used to determine whether the target vehicle is in a rollover or fall state based on vertical acceleration, roll angle, and change in roll angle when the target vehicle is detected to be in a collision state.

[0105] The third processing module is used to control the ignition gas generator if the condition is met, in order to prevent the battery from catching fire.

[0106] The fourth processing module is used to control the ignition state of the gas generator based on the battery pack temperature if no, the ignition state including ignition and non-ignition.

[0107] Furthermore, in one embodiment, the second processing module is specifically used for:

[0108] If the roll angle is less than the preset roll angle threshold, the vertical acceleration is within the preset acceleration range, and the roll angle change is within the preset angle range, then the target vehicle is determined to be in a rollover state.

[0109] If the roll angle is not less than the preset roll angle threshold, or the vertical acceleration is not within the preset acceleration range, or the roll angle change is not within the preset angle range, then the target vehicle is determined not to be in a rollover state.

[0110] If the vertical acceleration is greater than the preset acceleration threshold, the target vehicle is determined to be in a falling state.

[0111] If the vertical acceleration is not greater than the preset acceleration threshold, the target vehicle is determined not to be in a falling state.

[0112] Furthermore, in one embodiment, the fourth processing module is specifically used for:

[0113] If the battery pack temperature exceeds the preset first temperature threshold, the ignition gas generator is controlled.

[0114] If the battery pack temperature is less than or equal to a preset first temperature threshold, the non-ignition gas generator is controlled.

[0115] Furthermore, in one embodiment, the fourth processing module is specifically used for:

[0116] If the battery pack temperature is greater than a preset first temperature threshold, determine whether the battery pack temperature is less than a preset second temperature threshold. If the first temperature threshold is less than the second temperature threshold.

[0117] If so, the first gas generator, the second gas generator, and the third gas generator are detonated sequentially according to the reaction rate.

[0118] If not, then simultaneously detonate the first gas generator, the second gas generator, and the third gas generator.

[0119] Furthermore, in one embodiment, the fourth processing module is specifically used for:

[0120] Detonate the first gas generator to release inert gas;

[0121] After a preset first time period following the ignition of the first gas generator, the second gas generator is controlled to ignite.

[0122] After the second gas generator is ignited for a preset second time, the third gas generator is controlled to ignite to continuously release inert gas.

[0123] Furthermore, in one embodiment, the third processing module is specifically used for:

[0124] The gas generating device is positioned at a predetermined distance from the battery pack so that the inert gas in the gas generating device after ignition will cover the battery pack.

[0125] This application acquires vertical acceleration, roll angle, roll angle change, and battery pack temperature. When a target vehicle is detected to be in a collision state, if the vertical acceleration, roll angle, and roll angle change indicate that the target vehicle is in a rollover or fall state, it suggests that the bottom of the battery may have suffered mechanical damage, increasing the risk of battery fire. However, even in the event of a fault in the vehicle's electrical system, the battery pack temperature sensor and gas generator can still operate normally through an independent backup power supply. Therefore, in this case, the gas generator can be triggered to release inert gas, allowing for emergency control of the battery pack based on the inert gas, thereby rapidly reducing the risk of fire. If the vehicle is not in a rollover or fall state, it indicates that the bottom of the battery may not have suffered mechanical damage. The battery pack temperature can be used to determine whether it is necessary to control the ignition gas generator to prevent battery fire or other safety hazards caused by excessive temperature.

[0126] The functions of each module in the above-mentioned battery fire control system correspond to the steps in the above-mentioned battery fire control method embodiment, and their functions and implementation processes will not be described in detail here.

[0127] Thirdly, embodiments of this application provide a battery fire control device, which can be a personal computer (PC), laptop computer, server, or other device with data processing capabilities.

[0128] Reference Figure 8 , Figure 8This is a schematic diagram of the hardware structure of the battery fire control device involved in the embodiments of this application. In the embodiments of this application, the battery fire control device may include a processor, a memory, a communication interface, and a communication bus.

[0129] The communication bus can be of any type and is used to interconnect the processor, memory, and communication interface.

[0130] Communication interfaces include input / output (I / O) interfaces, physical interfaces, and logical interfaces used for interconnecting internal components of the battery fire control device, as well as interfaces used for interconnecting the battery fire control device with other devices (such as other computing devices or user equipment). Physical interfaces can be Ethernet interfaces, fiber optic interfaces, ATM interfaces, etc.; user equipment can be displays, keyboards, etc.

[0131] Memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0132] The processor can be a general-purpose processor, which can call the battery fire control program stored in the memory and execute the battery fire control method provided in the embodiments of this application. For example, the general-purpose processor can be a central processing unit (CPU). The method executed when the battery fire control program is called can be referred to in various embodiments of the battery fire control method of this application, and will not be repeated here.

[0133] Those skilled in the art will understand that Figure 8 The hardware structure shown does not constitute a limitation of this application and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0134] Fourthly, embodiments of this application also provide a readable storage medium.

[0135] The present application has a readable storage medium storing a battery fire control program, wherein when the battery fire control program is executed by a processor, it implements the steps of the battery fire control method described above.

[0136] The method implemented when the battery fire control program is executed can be referred to in various embodiments of the battery fire control method of this application, and will not be repeated here.

[0137] The terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus. The terms "first," "second," and "third," etc., are used to distinguish different objects, etc., and do not indicate a sequence, nor do they limit "first," "second," and "third" to different types.

[0138] In the description of the embodiments of this application, terms such as "exemplary," "for example," or "for instance" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplary," "for example," or "for instance" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary," "for example," or "for instance" is intended to present the relevant concepts in a concrete manner.

[0139] In the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more.

[0140] In some processes described in the embodiments of this application, multiple operations or steps are included in a specific order. However, it should be understood that these operations or steps may not be executed in the order they appear in the embodiments of this application, or they may be executed in parallel. The sequence number of the operation is only used to distinguish different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed sequentially or in parallel, and these operations or steps may be combined.

[0141] It should be noted that the sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0142] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device to execute the methods described in the various embodiments of this application.

[0143] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A method for controlling battery fire, characterized in that, The method for controlling battery fire includes: Obtain vertical acceleration, roll angle, roll angle change, and battery pack temperature; When a target vehicle is detected to be in a collision state, the vertical acceleration, roll angle, and change in roll angle are used to determine whether the target vehicle is in a rollover or falling state. If so, control the ignition gas generator to prevent the battery from catching fire; If not, the ignition state of the gas generator is controlled based on the battery pack temperature, and the ignition state includes ignition and non-ignition. The ignition state of the gas generator based on battery pack temperature control includes: If the battery pack temperature exceeds the preset first temperature threshold, the ignition gas generator is controlled. If the battery pack temperature is less than or equal to a preset first temperature threshold, the non-ignition gas generator is controlled. The gas generator in the gas generating device includes a first gas generator, a second gas generator, and a third gas generator. The reaction rate of the reactants in the first gas generator is greater than the reaction rates of the reactants in the second and third gas generators, and the reaction rate of the reactants in the second gas generator is equal to the reaction rate of the reactants in the third gas generator. The method of controlling the ignition gas generating device if the battery pack temperature exceeds a preset first temperature threshold also includes: If the battery pack temperature is greater than a preset first temperature threshold, determine whether the battery pack temperature is less than a preset second temperature threshold. If the first temperature threshold is less than the second temperature threshold. If so, the first gas generator, the second gas generator, and the third gas generator are detonated sequentially according to the reaction rate. If not, then simultaneously detonate the first gas generator, the second gas generator, and the third gas generator.

2. The battery fire control method as described in claim 1, characterized in that, The method of determining whether a target vehicle is in a rollover or fall state based on vertical acceleration, roll angle, and change in roll angle includes: If the roll angle is less than the preset roll angle threshold, the vertical acceleration is within the preset acceleration range, and the roll angle change is within the preset angle range, then the target vehicle is determined to be in a rollover state. If the roll angle is not less than the preset roll angle threshold, or the vertical acceleration is not within the preset acceleration range, or the change in roll angle is not within the preset angle range, then the target vehicle is determined not to be in a rollover state. If the vertical acceleration is greater than the preset acceleration threshold, the target vehicle is determined to be in a falling state. If the vertical acceleration is not greater than the preset acceleration threshold, the target vehicle is determined not to be in a falling state.

3. The battery fire control method as described in claim 1, characterized in that, The stepwise detonation of the first, second, and third gas generators according to their reaction rates includes: Detonate the first gas generator to release inert gas; After a preset first time period following the ignition of the first gas generator, the second gas generator is controlled to ignite. After the second gas generator is ignited for a preset second time, the third gas generator is controlled to ignite to continuously release inert gas.

4. The battery fire control method as described in claim 1, characterized in that, The gas generating device is positioned at a predetermined distance from the battery pack so that the inert gas in the gas generating device after ignition will cover the battery pack.

5. A control system for battery fire, characterized in that, The battery fire control system includes: The first processing module is used to acquire vertical acceleration, roll angle, roll angle change, and battery pack temperature. The second processing module is used to determine whether the target vehicle is in a rollover or fall state based on vertical acceleration, roll angle, and change in roll angle when the target vehicle is detected to be in a collision state. The third processing module is used to control the ignition gas generator if the condition is met, in order to prevent the battery from catching fire. The fourth processing module is used to control the ignition state of the gas generator based on the battery pack temperature if no, the ignition state including ignition and no ignition. The fourth processing module is further used for: If the battery pack temperature exceeds the preset first temperature threshold, the ignition gas generator is controlled. If the battery pack temperature is less than or equal to a preset first temperature threshold, the non-ignition gas generator is controlled. The gas generator in the gas generating device includes a first gas generator, a second gas generator, and a third gas generator. The reaction rate of the reactants in the first gas generator is greater than the reaction rates of the reactants in the second and third gas generators, and the reaction rate of the reactants in the second gas generator is equal to the reaction rate of the reactants in the third gas generator. The fourth processing module is further used for: If the battery pack temperature is greater than a preset first temperature threshold, determine whether the battery pack temperature is less than a preset second temperature threshold. If the first temperature threshold is less than the second temperature threshold. If so, the first gas generator, the second gas generator, and the third gas generator are detonated sequentially according to the reaction rate. If not, then simultaneously detonate the first gas generator, the second gas generator, and the third gas generator.

6. The battery fire control system as described in claim 5, characterized in that, The second processing module is specifically used for: If the roll angle is less than the preset roll angle threshold, the vertical acceleration is within the preset acceleration range, and the roll angle change is within the preset angle range, then the target vehicle is determined to be in a rollover state. If the roll angle is not less than the preset roll angle threshold, or the vertical acceleration is not within the preset acceleration range, or the change in roll angle is not within the preset angle range, then the target vehicle is determined not to be in a rollover state. If the vertical acceleration is greater than the preset acceleration threshold, the target vehicle is determined to be in a falling state. If the vertical acceleration is not greater than the preset acceleration threshold, the target vehicle is determined not to be in a falling state.

7. A control device for battery fire, characterized in that, The battery fire control device includes a processor, a memory, and a battery fire control program stored in the memory and executable by the processor, wherein when the battery fire control program is executed by the processor, it implements the steps of the battery fire control method as described in any one of claims 1 to 4.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a battery fire control program, wherein when the battery fire control program is executed by a processor, it implements the steps of the battery fire control method as described in any one of claims 1 to 4.

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