Thermal runaway alarm method, system and device, electronic equipment and storage medium

Abstract

The invention provides a thermal runaway alarm method, system and device, electronic equipment and a storage medium, and relates to the technical field of batteries. According to the method, a first state signal collected by a first sensor arranged in a target battery pack is obtained, a second state signal collected by a second sensor arranged outside the target battery pack is obtained, and the thermal runaway alarm is given under the condition that the target battery pack is judged to meet a thermal runaway alarm condition according to the first state signal and the second state signal. As the second sensor is arranged outside the target battery pack, even if thermal runaway occurs again after the first sensor loses efficacy due to thermal runaway of the target battery pack, detection can still be performed through the external second sensor so as to trigger the alarm again. Therefore, the scheme can be suitable for a scene of continuous thermal runaway of a plurality of battery cells, and the continuous thermal runaway condition of the plurality of battery cells can be sensed in time.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a thermal runaway alarm method, system, device, electronic device, and storage medium. Background Technology

[0002] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, power batteries, as the power source, play an irreplaceable and crucial role. With the vigorous promotion of new energy vehicles, the demand for power battery products is also increasing. Batteries are of great significance in energy storage and power supply; however, they also have high requirements for safety during use.

[0003] During battery use, abnormal factors such as weather, aging, and overcharging often cause thermal runaway. When a battery experiences thermal runaway, the emitted gases can easily ignite and burn after being discharged from the battery, and may even lead to a fire or explosion.

[0004] To ensure users are promptly aware of potential battery thermal runaway, an alarm system is used to notify them. However, the current alarm system only triggers one alarm after a cell experiences thermal runaway. Since the released fumes can cause thermal spread, other cells in the same battery pack may also experience thermal runaway. However, the current alarm system does not trigger another alarm, making it unsuitable for scenarios where multiple cells experience thermal runaway consecutively. Summary of the Invention

[0005] The purpose of this application is to provide a thermal runaway alarm method, system, device, electronic device, and storage medium to improve the existing alarm methods that are not applicable to scenarios where multiple battery cells experience thermal runaway consecutively.

[0006] In a first aspect, embodiments of this application provide a thermal runaway alarm method, the method comprising:

[0007] Acquire a first status signal collected by a first sensor located inside the target battery pack, and acquire a second status signal collected by a second sensor located outside the target battery pack;

[0008] If the target battery pack meets the thermal runaway alarm conditions based on the first state signal and the second state signal, a thermal runaway alarm message is output.

[0009] In the above implementation process, by acquiring the first state signal collected by the first sensor set inside the target battery pack and the second state signal collected by the second sensor set outside the target battery pack, and determining that the target battery pack meets the thermal runaway alarm conditions based on the first and second state signals, thermal runaway alarm information is output. Since the second sensor is set outside the target battery pack, even if the first sensor fails due to thermal runaway of the target battery pack, if thermal runaway occurs again, it can still be detected by the external second sensor to trigger the alarm again. Thus, this solution can be applied to the scenario of continuous thermal runaway of multiple battery cells, so as to detect the situation of continuous thermal runaway of multiple battery cells in a timely manner.

[0010] Optionally, the output thermal runaway alarm information includes:

[0011] Based on the battery pack information of the target battery pack, thermal runaway alarm information is output, wherein the battery pack information includes historical thermal runaway alarm information of the target battery pack.

[0012] In the above implementation process, corresponding thermal runaway alarm information can be output based on the battery pack information of the target battery pack, which makes it easier to know the thermal runaway situation of the target battery pack.

[0013] Optionally, the step of outputting thermal runaway alarm information based on the battery pack information of the target battery pack includes:

[0014] If the historical thermal runaway alarm information contains information indicating that the target battery pack has triggered an overheat runaway alarm, then an alarm message for the target battery pack to experience thermal runaway again will be output.

[0015] If the historical thermal runaway alarm information includes information indicating that the target battery pack has not triggered a thermal runaway alarm, then an alarm message is output for the first occurrence of thermal runaway in the target battery pack.

[0016] In the above implementation process, by using the information recorded in the historical thermal runaway alarm information, it can be known whether the target battery pack is experiencing thermal runaway for the first time or is experiencing thermal runaway again. If it is experiencing thermal runaway again, it indicates that a new cell in the target battery pack has experienced thermal runaway, and then it is convenient to take different measures to deal with it according to different thermal runaway situations.

[0017] Optionally, the output of alarm information for the first thermal runaway of the target battery pack includes:

[0018] If, based on the historical thermal runaway alarm information, it is determined that other battery packs in the battery system have triggered thermal runaway alarms, then alarm information is output for the first occurrence of thermal runaway in the target battery pack and for multiple battery packs experiencing thermal runaway. The battery system includes multiple battery packs, and the multiple battery packs include the target battery pack.

[0019] In the above implementation process, if the target battery pack is experiencing thermal runaway for the first time, and multiple battery packs in the battery system have already experienced thermal runaway, it indicates that the thermal runaway situation is relatively serious. Therefore, outputting corresponding alarm information can help to understand the severity of the thermal runaway situation.

[0020] Optionally, the historical thermal runaway alarm information also includes the number of battery packs that have triggered thermal runaway alarms, and determines whether other battery packs have already triggered thermal runaway alarms in the following ways:

[0021] If the number of battery packs is greater than 0, it is determined that other battery packs in the battery system have triggered an overheating runaway alarm.

[0022] In the above implementation process, the thermal runaway situation in the current battery system can be quickly determined based on the number of battery packs that have triggered the thermal runaway alarm.

[0023] Optionally, the thermal runaway handling measures will differ depending on the number of battery packs triggering thermal runaway alarms. This allows for different measures to be taken based on the severity of the thermal runaway, in order to minimize the losses caused by thermal runaway in a timely manner.

[0024] Optionally, if the number of battery packs is greater than a first preset value, the corresponding thermal runaway handling measure is water fire suppression.

[0025] If the number of battery packs is less than or equal to the first preset value, the corresponding thermal runaway handling measure is nitrogen release treatment.

[0026] In the above implementation process, when the thermal runaway is severe, water fire suppression is used directly to handle it, which facilitates timely control of the thermal runaway. When the thermal runaway is mild, nitrogen gas is used for release, which can reduce damage to the battery pack and minimize the losses caused by thermal runaway.

[0027] Optionally, the historical thermal runaway alarm information includes the number of thermal runaway alarms. The number of thermal runaway alarms indicates the number of times the target battery pack has triggered a thermal runaway alarm. Whether the target battery pack has triggered a thermal runaway alarm is determined by the following method:

[0028] When the number of thermal runaway alarms is 0, it is determined that the target battery pack has not triggered a thermal runaway alarm.

[0029] When the number of thermal runaway alarms is greater than 0, it is determined that the target battery pack has triggered a thermal runaway alarm.

[0030] In the above implementation process, the thermal runaway alarm count can be recorded to quickly determine the thermal runaway status of the target battery pack.

[0031] Optionally, different thermal runaway alarm frequencies require different thermal runaway handling measures. This allows for different measures to be taken based on the severity of the thermal runaway, in order to reduce the losses caused by thermal runaway in a timely manner.

[0032] Optionally, if the number of thermal runaway alarms is greater than or equal to a second preset value, the corresponding thermal runaway handling measure is water fire suppression.

[0033] If the number of thermal runaway alarms is less than the second preset value, the corresponding thermal runaway handling measure is nitrogen release treatment.

[0034] In the above implementation process, when the thermal runaway is severe, water fire suppression is used directly to handle it, which facilitates timely control of the thermal runaway. When the thermal runaway is mild, nitrogen gas is used for release, which can reduce damage to the battery pack and minimize the losses caused by thermal runaway.

[0035] Optionally, the step of outputting thermal runaway alarm information when determining that the target battery pack meets the thermal runaway alarm conditions based on the first state signal and the second state signal includes:

[0036] If the set alarm interval duration is met and the target battery pack meets the thermal runaway alarm conditions based on the first state signal and the second state signal, then a thermal runaway alarm message is output. The set alarm interval duration refers to the time between the current moment and the previous output of the thermal runaway alarm message.

[0037] In the above implementation process, a time limit is added between the two alarms in order to better distinguish the thermal runaway situations of different battery packs or different cells within the battery pack.

[0038] Optionally, the first sensor includes a temperature sensor and / or a voltage sensor, and the first status signal includes a temperature signal and / or a voltage signal;

[0039] And / or, the second sensor includes at least one of the following: a pressure sensor, a gas sensor, a smoke sensor, and the second status signal includes at least one of the following: a pressure signal, a gas signal, a smoke signal.

[0040] In the above implementation process, by setting different types of first and second sensors, state signals can be collected from multiple aspects, thereby achieving accurate detection of thermal runaway.

[0041] Optionally, the thermal runaway alarm conditions include:

[0042] The temperature signal indicates a temperature greater than a set temperature threshold and / or the voltage signal indicates a voltage less than a set voltage threshold, and at least one of the second status signals indicates information greater than the corresponding set threshold.

[0043] Alternatively, the temperature indicated by the temperature signal is greater than a set temperature threshold and / or the voltage indicated by the voltage signal is less than a set voltage threshold, and the rate of change of the information indicated by at least one of the second state signals is greater than the corresponding set rate of change threshold.

[0044] Alternatively, the temperature change rate indicated by the temperature signal is greater than a set temperature change rate threshold and / or the voltage change rate indicated by the voltage signal is greater than a set voltage change rate threshold, and the change rate of information indicated by at least one of the second status signals is greater than the corresponding set change rate threshold.

[0045] In the above implementation process, accurate detection of thermal runaway can be achieved by setting corresponding thermal runaway alarm conditions.

[0046] Optionally, the number of each type of sensor in the first sensor and the second sensor is at least one;

[0047] And / or, the second sensor is shared by various battery packs within the battery system.

[0048] In the above implementation process, deploying multiple sensors can improve the accuracy of thermal runaway detection.

[0049] Secondly, embodiments of this application provide an alarm system, the system comprising:

[0050] A first sensor is installed inside the target battery pack to collect a first state signal;

[0051] A second sensor is installed outside the target battery pack to collect a second status signal;

[0052] An alarm device is used to output thermal runaway alarm information when the target battery pack meets the thermal runaway alarm conditions based on the first state signal and the second state signal.

[0053] Thirdly, embodiments of this application provide a thermal runaway alarm device, the device comprising:

[0054] The signal acquisition module is used to acquire a first state signal collected by a first sensor located inside the target battery pack, and to acquire a second state signal collected by a second sensor located outside the target battery pack.

[0055] The alarm module is used to output thermal runaway alarm information when the target battery pack meets the thermal runaway alarm conditions based on the first status signal and the second status signal.

[0056] Fourthly, embodiments of this application provide an electronic device, including a processor and a memory, wherein the memory stores computer-readable instructions, and when the computer-readable instructions are executed by the processor, the steps of the method provided in the first aspect above are performed.

[0057] Fifthly, embodiments of this application provide a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, performs the steps of the method provided in the first aspect above.

[0058] In a sixth aspect, embodiments of this application provide a computer program product, including computer program instructions, which, when read and executed by a processor, perform the steps of the method provided in the first aspect above.

[0059] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing embodiments of this application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings. Attached Figure Description

[0060] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0061] Figure 1 A flowchart illustrating a thermal runaway alarm method provided in this application embodiment;

[0062] Figure 2 This is a schematic diagram of a first deployment of a sensor provided in an embodiment of this application;

[0063] Figure 3 This is a schematic diagram illustrating a second deployment of a sensor according to an embodiment of this application;

[0064] Figure 4 This is a schematic diagram illustrating a third deployment of a sensor according to an embodiment of this application;

[0065] Figure 5A structural block diagram of an alarm system provided in an embodiment of this application;

[0066] Figure 6 A structural block diagram of a thermal runaway alarm device provided in an embodiment of this application;

[0067] Figure 7 This is a schematic diagram of the structure of an electronic device for performing a thermal runaway alarm method, provided in an embodiment of this application. Detailed Implementation

[0068] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0069] It should be noted that the terms "system" and "network" in the embodiments of this invention can be used interchangeably. "Multiple" refers to two or more; therefore, in the embodiments of this invention, "multiple" can also be understood as "at least two". "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / ", unless otherwise specified, generally indicates that the preceding and following related objects have an "or" relationship.

[0070] During battery use or energy storage, abnormal factors such as weather, aging, and overcharging can often trigger thermal runaway, generating large amounts of thermal runaway fumes. In a battery system, a battery pack can contain multiple cells. If a cell in the pack experiences thermal runaway, sensors within the pack detect it and trigger an alarm. However, the released fumes can spread heat, potentially causing other cells in the same pack to also experience thermal runaway. The initial thermal runaway of a cell might cause the sensors within the pack to malfunction, preventing the alarm from triggering again. Therefore, current alarm methods are not suitable for scenarios where multiple cells experience consecutive thermal runaways.

[0071] Based on the above problems, this application proposes a thermal runaway alarm method. This method acquires a first state signal collected by a first sensor installed inside the target battery pack and a second state signal collected by a second sensor installed outside the target battery pack. If the target battery pack meets the thermal runaway alarm conditions based on the first and second state signals, thermal runaway alarm information is output. Since the second sensor is installed outside the target battery pack, even if the first sensor fails due to thermal runaway of the target battery pack, if thermal runaway occurs again, it can still be detected by the external second sensor to trigger the alarm again. Thus, this solution can be applied to scenarios of continuous thermal runaway of multiple battery cells, so as to detect the continuous thermal runaway of multiple battery cells in a timely manner.

[0072] Please refer to Figure 1 , Figure 1 A flowchart of a thermal runaway alarm method provided in this application embodiment, the method including the following steps:

[0073] Step S110: Acquire a first state signal collected by a first sensor located inside the target battery pack, and acquire a second state signal collected by a second sensor located outside the target battery pack.

[0074] The target battery pack can be understood as any battery pack in the battery system, or it can refer to a specific battery pack. For example, if thermal runaway monitoring is to be performed on a certain battery pack, then that battery pack can be called the target battery pack.

[0075] A battery system can include multiple battery packs, including the target battery pack mentioned above. The battery system can be housed within a single enclosure. In some applications, a battery pack can also be referred to as a battery. A battery pack can be a battery cell formed by multiple battery modules, used to store and provide electrical energy. A battery module is a unit formed by multiple battery cells, used to provide higher voltage and capacitance. Therefore, it can also be said that a battery pack can include multiple battery cells.

[0076] The first sensor is installed inside the target battery pack. Understandably, each battery pack can contain a first sensor, which can be used to collect the first state signal of its respective battery pack. The state information of the cells within the battery pack can all be obtained through the first sensor.

[0077] In some implementations, each battery pack may also include a Cell Supervision Circuit (CSC). The CSC is a monitor installed within the battery pack, responsible for collecting information from the battery pack and transmitting it to the Super Battery Management Unit (SBMU). The SBMU is responsible for analyzing and transmitting the status data of all battery packs within the battery pack. For example, the SBMU can monitor for thermal runaway of the battery packs within the battery pack to trigger a thermal runaway alarm. The SBMU can then output the thermal runaway alarm information to the battery management system for processing. The battery management system manages all battery packs, and each battery pack may include at least one battery pack.

[0078] Understandably, the first sensor can communicate with the CSC, meaning the first state signal acquired by the first sensor can be transmitted to the CSC first, and then transmitted by the CSC to the SBMU. In some embodiments, the executing entity of the thermal runaway alarm method of this scheme can be an alarm system, which can refer to the aforementioned SBMU, or it can be a system comprising the SBMU and the battery management system, etc. Of course, in practical applications, the alarm system can also refer to a single module in the SBMU, or a module in the battery management system, etc., and can be divided according to actual functions. For example, the alarm system can also be a module independent of the battery management system, used for thermal runaway alarm independently.

[0079] In practical applications, if the alarm system is deployed within the SBMU, the SBMU can output thermal runaway alarm information to the battery management system. Upon receiving the thermal runaway alarm information, the battery management system can determine the corresponding handling measures based on the relevant information carried in the alarm message, and then send the corresponding control signal to the fire control panel to instruct the control panel to control the corresponding handling system for appropriate processing. Of course, in some other scenarios, the SBMU can also directly communicate with the fire control panel. In this case, the SBMU can directly convert the thermal runaway alarm information into corresponding control signals and send them to the fire control panel. In this scenario, the SBMU can perform thermal runaway monitoring and alarm for battery packs within a single battery cluster. In this scenario, the battery system refers to a single battery cluster.

[0080] Understandably, each battery cluster corresponds to one SBMU, and each battery cluster includes multiple battery packs. Therefore, monitoring the thermal runaway of multiple battery packs within a battery cluster is implemented by the SBMU of that battery cluster. If the battery system may include multiple battery clusters, the thermal runaway of the battery packs within this battery system can be monitored by the battery management system. Therefore, the method in this solution can monitor the thermal runaway of a single battery pack or multiple battery packs within multiple battery clusters. The difference between monitoring the thermal runaway of a single battery cluster or multiple battery clusters is only microscopic versus macroscopic; the specific monitoring and alarm methods are the same.

[0081] If a battery pack experiences thermal runaway, the spread of the hot gas generated by the runaway may cause other battery packs in the battery system to also experience thermal runaway. Alternatively, if a cell in a battery pack experiences thermal runaway, the heat spread may cause other cells in the same battery pack to also experience thermal runaway. In order to detect thermal runaway in this situation, a second sensor is installed outside the battery pack in this solution.

[0082] If the detection involves thermal runaway of multiple cells within a battery pack, a second sensor can be installed on the outside of each battery pack. This is because if thermal runaway occurs in one cell within the battery pack, the first sensor may fail. The second sensor can then detect this, collecting a second status signal to determine if the battery pack is experiencing further thermal runaway. Alternatively, a second sensor on each battery pack can also be used to detect thermal runaway of multiple consecutive battery packs. In this case, the alarm system can aggregate the second status signals collected by each second sensor to make a judgment. The thermal runaway of each battery pack can then be determined using its own first and second status signals. The specific judgment method will be explained in detail later.

[0083] In other implementations, multiple battery packs can correspond to one second sensor. This second sensor collects the second state signals of multiple battery packs. Multiple battery packs can refer to all battery packs within the battery system, or only a portion of them. For example, a second sensor can be set up for every k battery packs, where k is an integer greater than 1. Alternatively, one battery cluster can correspond to one second sensor, or all battery clusters can correspond to one second sensor.

[0084] In some embodiments, the second sensor can be disposed within the venting compartment of the battery pack. If one venting compartment corresponds to one battery cluster (each battery pack within the battery cluster can be connected to the venting compartment via pipes), the second sensor can be disposed within the venting compartment corresponding to the battery cluster. Alternatively, the second sensor can also be disposed on the inner wall of the battery compartment, which is used to accommodate at least one battery pack. Since the second sensor is disposed outside the battery pack, it reduces the risk of failure due to thermal runaway of the battery pack. The main purpose of the second sensor is to continue to be used and to collect the second state signal of the battery pack even if the first sensor inside the battery pack fails.

[0085] The second sensor can be connected to the alarm system, so that the second sensor can transmit the collected second status signal to the alarm system.

[0086] In some implementations, the first sensor and / or the second sensor can collect status signals in real time or at regular intervals, and then transmit the collected status signals to the alarm system for corresponding processing.

[0087] Step S120: If the target battery pack meets the thermal runaway alarm conditions based on the first state signal and the second state signal, output thermal runaway alarm information.

[0088] After acquiring the first and second state signals, the alarm system can determine whether the target battery pack meets the thermal runaway alarm conditions based on these signals. Understandably, the alarm system can store thermal runaway alarm conditions. The first and second state signals can be matched with these conditions; a successful match indicates that the thermal runaway alarm conditions are met, and a thermal runaway alarm message can be output. An unsuccessful match indicates that the thermal runaway alarm conditions are not met, and no further processing is performed; the system continues to receive subsequent state signals for further evaluation.

[0089] In the above implementation process, by acquiring the first state signal collected by the first sensor set inside the target battery pack and the second state signal collected by the second sensor set outside the target battery pack, and determining that the target battery pack meets the thermal runaway alarm conditions based on the first and second state signals, thermal runaway alarm information is output. Since the second sensor is set outside the target battery pack, even if the first sensor fails due to thermal runaway of the target battery pack, if thermal runaway occurs again, it can still be detected by the external second sensor to trigger the alarm again. Thus, this solution can be applied to the scenario of continuous thermal runaway of multiple battery cells, so as to detect the situation of continuous thermal runaway of multiple battery cells in a timely manner.

[0090] Based on the above embodiments, when outputting thermal runaway alarm information, thermal runaway alarm information can also be output according to the battery pack information of the target battery pack, wherein the battery pack information includes the historical thermal runaway alarm information of the target battery pack.

[0091] Understandably, the alarm system can record relevant information about thermal runaway alarms for each battery pack, including whether a thermal runaway alarm has occurred and the number of thermal runaway alarms. Based on this information, when outputting thermal runaway alarm information, the corresponding alarm information can be output according to the battery pack information.

[0092] For example, if the target battery pack triggers a thermal runaway alarm for the first time, the alarm message can be output for the first instance of thermal runaway. If the target battery pack triggers a thermal runaway alarm again, the alarm message can be output for the second instance of thermal runaway. This allows for differentiation of different levels of thermal runaway alarms, enabling different handling measures to be taken based on the severity of the alarm. Alternatively, the alarm system can output different thermal runaway alarm messages, allowing personnel to perceive the severity of thermal runaway within the battery system and take different handling measures accordingly. Or, the alarm system can output different thermal runaway alarm messages to the fire protection system (such as a fire control panel), allowing the fire protection system to take different handling measures based on the different thermal runaway alarm messages.

[0093] In the above implementation process, corresponding thermal runaway alarm information can be output based on the battery pack information of the target battery pack, which makes it easier to know the thermal runaway situation of the target battery pack.

[0094] Based on the above embodiments, the alarm system can record battery pack information for each battery pack. This battery pack information may include historical thermal runaway alarm information of the battery pack. Therefore, based on the historical thermal runaway alarm information, it can be determined whether the battery pack has triggered an overheating runaway alarm. For example, if the historical thermal runaway alarm information contains information indicating that the target battery pack has triggered an overheating runaway alarm, then an alarm message is output for the target battery pack to experience thermal runaway again. If the historical thermal runaway alarm information contains information indicating that the target battery pack has not triggered an overheating runaway alarm, then an alarm message is output for the target battery pack to experience thermal runaway for the first time.

[0095] Understandably, historical thermal runaway alarm information can include whether the battery pack has triggered an overheat runaway alarm. For example, in the battery pack information, if the battery pack has triggered an overheat runaway alarm, it can be marked by the corresponding field. For example, marking the corresponding field as 1 indicates that an overheat runaway alarm has been triggered. If the corresponding field is not marked, or is marked with something else, such as marking the corresponding field as 0, it indicates that an overheat runaway alarm has not been triggered. Therefore, the corresponding field can be used to indicate whether the battery pack has triggered an overheat runaway alarm.

[0096] Alternatively, if the battery pack triggers an overheat runaway alarm, the relevant alarm information can be recorded in the battery pack information. If the battery pack does not trigger an overheat runaway alarm, the relevant alarm information will not be recorded in the battery information. Therefore, you can check in the battery pack information for any alarm information indicating that the battery pack has triggered a thermal runaway alarm. If there is no such alarm, it means that the battery pack has not triggered an overheat runaway alarm before, and this indicates that the battery pack has triggered a thermal runaway alarm for the first time. If there is such an alarm, it means that the battery pack has triggered an overheat runaway alarm before, and this indicates that the battery pack has triggered a thermal runaway alarm again.

[0097] In some other implementations, when transmitting the first status signal of a battery pack, the CSC within each battery pack also transmits the battery pack's identifier, allowing the alarm system to record the first status signals of different battery packs. The battery pack identifier can be information such as the battery pack's address or device identifier.

[0098] The alarm system can record the correspondence between the first status signal and the battery pack. In this case, after receiving the first status signal of a certain battery pack for the first time, the alarm system records the correspondence between the battery pack's identifier and the first status signal. Subsequent first status signals received from the same battery pack can also be added to this correspondence. Alternatively, the alarm system can record the correspondence between the first status signal and the battery pack each time it receives one.

[0099] This allows the system to record battery pack information after determining that a battery pack has triggered a thermal runaway alarm. For example, if the alarm system determines that a battery pack has triggered a thermal runaway alarm, it can record the battery pack's identifier and store it in a folder containing historical thermal runaway alarm information. The information in this folder can then be used to indicate whether the battery pack has triggered an over-thermal runaway alarm. When determining whether the target battery pack is triggering a thermal runaway alarm for the first time or is triggering it again, the system can search the folder to see if the target battery pack's identifier is recorded. If it is not found, it means that the target battery pack is triggering a thermal runaway alarm for the first time; if it is found, it means that the target battery pack is triggering a thermal runaway alarm again.

[0100] When a thermal runaway alarm is triggered for the first time or is triggered again, an identifier can be added when outputting the thermal runaway alarm information. This allows the system to determine which handling measures to take based on the thermal runaway alarm information.

[0101] For example, if the target battery pack triggers a thermal runaway alarm again, it can be determined that another cell in the target battery pack has experienced thermal runaway. This may be a situation where thermal runaway occurs in consecutive cells, so appropriate measures can be taken to handle the situation.

[0102] In the above implementation process, by using the information recorded in the historical thermal runaway alarm information, it can be known whether the target battery pack is experiencing thermal runaway for the first time or is experiencing thermal runaway again. If it is experiencing thermal runaway again, it indicates that a new cell in the target battery pack has experienced thermal runaway, and then it is convenient to take different measures to deal with it according to different thermal runaway situations.

[0103] Based on the above embodiments, if it is determined that the target battery pack is triggering a thermal runaway alarm for the first time, in order to further determine whether multiple battery packs in the battery system have experienced thermal runaway, that is, to determine whether the target battery pack experienced thermal runaway due to thermal propagation caused by thermal runaway of other battery packs, in this case, it can be determined whether other battery packs in the battery system have already triggered thermal runaway alarms based on historical thermal runaway alarm information. If so, alarm information is output for the target battery pack experiencing thermal runaway for the first time and for multiple battery packs experiencing thermal runaway.

[0104] Understandably, the alarm system can record thermal runaway alarm information for each battery pack in the battery system. For example, in the above example, the thermal runaway alarm information for each battery pack can be stored in a folder containing historical thermal runaway alarm information. This folder records the identifiers of battery packs that have triggered thermal runaway alarms. By checking if the folder contains the identifier of a battery pack, if it does, it is determined that multiple battery packs in the battery system have experienced thermal runaway; otherwise, it is determined that the target battery pack is the first battery pack in the battery system to experience thermal runaway. At this point, corresponding thermal runaway alarm information can be output for different situations to facilitate understanding of the thermal runaway situation in the battery system, and then appropriate handling measures can be taken.

[0105] Therefore, the alarm system can determine whether the battery pack has triggered an overheat runaway alarm based on historical thermal runaway alarm information. If it is found that other battery packs have triggered overheat runaway alarms, it means that an additional thermal runaway alarm has been added to the target battery pack. The presence of a new battery pack triggering a thermal runaway alarm indicates that the thermal runaway of the battery system is relatively serious, and corresponding measures can be taken to deal with it.

[0106] In the above implementation process, if the target battery pack is experiencing thermal runaway for the first time, and multiple battery packs in the battery system have already experienced thermal runaway, it indicates that the thermal runaway situation is relatively serious. Therefore, outputting corresponding alarm information can help to understand the severity of the thermal runaway situation.

[0107] In some other implementations, the aforementioned historical thermal runaway alarm information may also include the number of battery packs that have triggered thermal runaway alarms. This allows for the determination of whether other battery packs have triggered thermal runaway alarms in the following way: if the number of battery packs is greater than 0, then it is determined that other battery packs have triggered thermal runaway alarms.

[0108] Understandably, the alarm system can count the number of battery pack identifiers stored in the folder containing historical thermal runaway alarm information in real time or each time a thermal runaway detection is performed. This number of battery packs represents the number of battery packs that have triggered a thermal runaway alarm. Alternatively, the alarm system can use a counter to count the number of battery packs that have triggered a thermal runaway alarm. For example, each time a new battery pack is detected as having experienced thermal runaway, the counter is incremented by 1. This way, the counter value can be directly obtained to determine the number of battery packs that have triggered a thermal runaway alarm. If the number of battery packs is 0, it means that no other battery pack has triggered a thermal runaway alarm yet. In this case, the target battery pack is the first battery pack in the battery system to trigger a thermal runaway alarm.

[0109] It should be noted that if the alarm system is an SBMU (Battery Management Unit), when outputting thermal runaway alarm information to the battery management system, the alarm system can carry information indicating that the target battery pack is experiencing its first thermal runaway and that multiple battery packs have experienced thermal runaway, or it can carry alarm information indicating that the target battery pack is experiencing thermal runaway again. The battery management system can take different measures to handle these two situations. For example, if the target battery pack is experiencing thermal runaway again, it indicates that no more battery packs in the current battery system have experienced thermal runaway, and nitrogen inerting can be performed. If the target battery pack is experiencing its first thermal runaway and that multiple battery packs are experiencing thermal runaway, it indicates that the thermal runaway situation in the current battery system is relatively severe, and water fire suppression can be performed.

[0110] Alternatively, the battery management system can also perform statistical analysis and judgment based on the thermal runaway alarm information output by the SBMU. For example, if the target battery pack experiences thermal runaway again, the battery management system can count the number of thermal runaway alarms for the target battery pack and then take appropriate action. If the target battery pack experiences thermal runaway for the first time and multiple battery packs experience thermal runaway, the battery management system can count the number of battery packs that experienced thermal runaway and then take appropriate action. Of course, the SBMU can also perform the statistical analysis itself, such as counting the number of battery packs that experienced thermal runaway within the battery cluster corresponding to the SBMU and / or counting the number of thermal runaway alarms for the target battery pack within the battery cluster. After collecting this data, appropriate action can be taken based on the statistical information, or the statistical information can be sent to the battery management system for aggregation and processing.

[0111] In the above implementation process, the thermal runaway situation in the current battery system can be quickly determined based on the number of battery packs that have triggered the thermal runaway alarm.

[0112] Based on the above embodiments, in order to facilitate different handling measures for different degrees of thermal runaway, the thermal runaway handling measures can also be different depending on the number of battery packs that trigger thermal runaway alarms.

[0113] Assume that the number of battery packs experiencing thermal runaway is counted by the battery management system (BMS), meaning the BMS counts the number of battery packs experiencing thermal runaway across multiple battery clusters. For example, the SBMU in each battery cluster transmits an alarm signal to the BMS, which carries an identifier of the battery pack that experienced the thermal runaway alarm. This allows the BMS to count the number of battery packs experiencing thermal runaway across multiple battery clusters.

[0114] The battery management system can be pre-configured with corresponding handling measures for different numbers of battery packs that trigger thermal runaway alarms. This allows for different handling measures to be applied depending on the number of battery packs. For example, if the number of battery packs is within a first preset range, it indicates that the thermal runaway is not yet severe, and handling measure 1 can be used. If the number of battery packs is within a second preset range, it indicates that the thermal runaway is more severe, and handling measure 2 can be used. The handling measures 1 and 2 differ depending on the first and second preset ranges. Of course, in practical applications, the handling measures corresponding to different numbers of batteries can be set according to actual needs.

[0115] Understandably, the number of battery packs experiencing thermal runaway, as counted here, could also be determined by the SBMU (Battery Management Unit), which would then send the data to the Battery Management System (BMS). Alternatively, the SBMU itself could determine different handling measures based on the count of battery packs. In this case, the SBMU stores the handling measures corresponding to different numbers of battery packs, and then sends the determined handling measures to the BMS for control and processing.

[0116] In the above implementation process, different treatment measures can be adopted for different thermal runaway situations to achieve better treatment results. This allows for different measures to be taken based on the severity of thermal runaway, thus mitigating the losses caused by thermal runaway in a timely manner.

[0117] Based on the above embodiments, different treatment measures are taken for different numbers of battery packs. For example, if the number of battery packs is greater than the first preset value, the corresponding thermal runaway treatment measure is water fire suppression. If the number of battery packs is less than or equal to the first preset value, the corresponding thermal runaway treatment measure is nitrogen release.

[0118] For example, the first preset value here can be set to 2, and the specific value can be set according to actual needs. If more than one battery pack has already experienced thermal runaway, and a new target battery pack has also experienced thermal runaway, it means that more than two battery packs in the battery system have experienced thermal runaway, indicating that the thermal runaway situation in the battery system is already quite serious. Therefore, water fire suppression measures can be directly taken to handle the thermal runaway. If one or fewer battery packs have already experienced thermal runaway, and a new target battery pack has also experienced thermal runaway, it means that two or fewer battery packs in the battery system have already experienced thermal runaway. In this case, the thermal runaway situation in the battery system is not too serious, and nitrogen gas can be released to handle the thermal runaway.

[0119] In specific handling, the SBMU can send the determined handling measures to the battery management system, or the battery management system can determine the corresponding handling measures and then control the fire control panel. At this time, the fire control panel can open the nitrogen inerting solenoid valve according to the handling measures, so as to perform nitrogen release treatment on the battery pack that has experienced thermal runaway. Alternatively, the fire control panel can open the solenoid valve of the liquid treatment chamber according to the handling measures, so as to perform water fire suppression treatment on the battery pack that has experienced thermal runaway.

[0120] It should be noted that if the number of battery packs experiencing thermal runaway is counted by different systems, the initial preset value set when determining the handling measures can differ. For example, if the count is from the SBMU (Battery Storage Unit), the initial preset value for the SBMU should be relatively small because it corresponds to a smaller total number of battery packs. Conversely, if the count is from the Battery Management System (BMS), the initial preset value for the BMS should be relatively large because it corresponds to a larger number of battery packs. Of course, the initial preset value can be the same regardless of which system is using the count.

[0121] In the above implementation process, when the thermal runaway is severe, water fire suppression is used directly to handle it, which facilitates timely control of the thermal runaway. When the thermal runaway is mild, nitrogen gas is used for release, which can reduce damage to the battery pack and minimize the losses caused by thermal runaway.

[0122] The above approach determines the number of battery packs in a battery system that have triggered thermal runaway alarms from a horizontal perspective, and employs different handling measures for different thermal runaway scenarios. The following section describes the handling methods for determining the number of cells within a battery pack that have triggered thermal runaway alarms from a vertical perspective.

[0123] Based on the above embodiments, the historical thermal runaway alarm information may also include the number of thermal runaway alarms. This number of thermal runaway alarms is used to indicate the number of times the target battery pack triggers a thermal runaway alarm, that is, to indicate the number of times a single battery pack triggers a thermal runaway alarm. In this way, in determining whether the target battery pack has triggered a thermal runaway alarm, it can be determined that when the number of thermal runaway alarms is 0, the target battery pack has not triggered a thermal runaway alarm; when the number of thermal runaway alarms is greater than 0, the target battery pack has triggered a thermal runaway alarm.

[0124] In other words, the alarm system can also record the number of thermal runaway alarms for each battery pack. For example, when a target battery pack triggers a thermal runaway alarm for the first time, its thermal runaway alarm count is recorded as 1, indicating that a cell in the target battery pack has experienced thermal runaway. If the thermal runaway of this cell leads to thermal runaway of other cells in the target battery pack, the target battery pack will trigger a thermal runaway alarm again, and the alarm system can update the thermal runaway alarm count to 2. Therefore, based on the number of thermal runaway alarms, it is possible to know whether the target battery pack has triggered a thermal runaway alarm before, that is, whether the target battery pack has triggered a thermal runaway alarm for the first time or again, and of course, it is also possible to know the number of cells in the target battery pack that have experienced thermal runaway.

[0125] In some implementations, the alarm system can use a counter to count the number of thermal runaway alarms. Each battery pack can correspond to a counter. For example, each time a thermal runaway of a battery pack is detected, the counter is incremented by 1. In this way, the count value of the counter can be directly obtained to know the number of thermal runaway alarms for that battery pack.

[0126] In the above implementation process, the thermal runaway alarm count can be recorded to quickly determine the thermal runaway status of the target battery pack.

[0127] Based on the above embodiments, the thermal runaway handling measures may differ depending on the number of thermal runaway alarms.

[0128] Regardless of whether the thermal runaway alarm count is recorded by the SBMU or the battery management system, the number of thermal runaway alarms for a single battery pack is the same, while the number of battery packs mentioned above may differ depending on the system used for the count.

[0129] Assuming the number of thermal runaway alarms is counted by the battery management system (BMS), the BMS can be pre-configured with corresponding handling measures for different numbers of thermal runaway alarms. This allows for different handling measures to be applied to different numbers of thermal runaway alarms. For example, if the number of thermal runaway alarms is within a first preset range, it indicates that the thermal runaway situation is not very serious, and handling measure 1 can be used. If the number of thermal runaway alarms is within a second preset range, it indicates that the thermal runaway situation is more serious, and handling measure 2 can be used. The handling measures 1 and 2 differ depending on the first and second preset ranges. Of course, in practical applications, the handling measures corresponding to different numbers of thermal runaway alarms can be set according to actual needs.

[0130] In the above implementation process, different treatment measures can be adopted for different thermal runaway situations to achieve better treatment results. This allows for different measures to be taken based on the severity of thermal runaway, thus mitigating the losses caused by thermal runaway in a timely manner.

[0131] Based on the above embodiments, among the thermal runaway handling measures corresponding to different thermal runaway alarm counts, if the number of thermal runaway alarm counts is greater than or equal to the second preset value, the corresponding thermal runaway handling measure is water fire suppression; if the number of thermal runaway alarm counts is less than the second preset value, the corresponding thermal runaway handling measure is nitrogen release.

[0132] For example, the second preset value here can be set to 3, and of course, the specific value can be set according to actual needs. If the thermal runaway alarm count of the target battery pack is 3, it means that the thermal runaway situation of the target battery pack is already quite serious, so water fire suppression measures can be directly taken to deal with the thermal runaway. If the thermal runaway alarm count of the target battery pack is 2, it means that the thermal runaway situation of the target battery pack is not too serious, so nitrogen gas can be released to deal with the thermal runaway.

[0133] In specific processing, the SBMU can send the determined processing measures to the battery management system, or the battery management system can determine the corresponding processing measures and then control the fire control panel. At this time, the fire control panel can open the nitrogen inerting solenoid valve according to the processing measures, so as to release nitrogen to the target battery pack. Alternatively, the fire control panel can open the solenoid valve of the liquid treatment chamber according to the processing measures, so as to perform water fire treatment on the target battery pack.

[0134] It should be noted that, for the battery management system, whenever a battery pack experiences thermal runaway, the system can count the number of battery packs that triggered thermal runaway alarms and the number of alarms for that battery pack. If the number of battery packs exceeds a first preset value, water suppression is applied to that battery pack, even if the number of thermal runaway alarms is less than or equal to a second preset value. If the number of battery packs is less than or equal to the first preset value, but the number of thermal runaway alarms exceeds the second preset value, nitrogen venting is applied to that battery pack. In other words, water suppression is applied only if at least one of the battery pack count or the number of thermal runaway alarms meets the conditions for nitrogen suppression; otherwise, nitrogen venting is applied.

[0135] Understandably, after nitrogen venting or water fire suppression, the battery pack is no longer usable. In this case, a new, fault-free battery pack can be used instead. The battery pack can then be recycled and processed, such as through multi-level utilization of its components.

[0136] In the above implementation process, when the thermal runaway is severe, water fire suppression is used directly to handle it, which facilitates timely control of the thermal runaway. When the thermal runaway is mild, nitrogen gas is used for release, which can reduce damage to the battery pack and minimize the losses caused by thermal runaway.

[0137] Based on the above embodiments, the first sensor may include a temperature sensor and / or a voltage sensor, and the first state signal may include a temperature signal and / or a voltage signal. And / or, the second sensor may include at least one of the following: a pressure sensor, a gas sensor, or a smoke sensor, and the second state signal may include at least one of the following: a pressure signal, a gas signal, or a smoke signal.

[0138] Understandably, even if the battery pack does not experience thermal runaway, its temperature or voltage may change under certain circumstances (for example, the voltage of the battery cells may drop during charging and discharging due to aging). In such cases, judging only the first state signal is insufficient to accurately determine whether the battery pack has experienced thermal runaway. Therefore, this solution also incorporates the second state signal for judgment. If the battery pack experiences thermal runaway, it will produce smoke, which can be detected using a second sensor. This, combined with the first and second state signals, enables the detection of thermal runaway.

[0139] Understandably, a temperature sensor can be used to detect the temperature inside the battery pack, and a voltage sensor can be used to detect the voltage inside the battery pack. If thermal runaway occurs, the temperature inside the battery pack will rise, and the voltage will drop. To facilitate accurate acquisition of the second state signal, the second sensor can be placed inside the exhaust chamber of the battery pack. If one battery cluster corresponds to one second sensor, then the exhaust gas from all battery clusters in that cluster will be exhausted into the same exhaust chamber. To facilitate accurate detection, multiple types of second sensors can be used, such as pressure sensors, gas sensors, and smoke sensors. This is to ensure that even if one sensor fails, detection can continue using other sensors.

[0140] It should be noted that the types of the first and second sensors are not limited to these. In practical applications, a wider variety of sensors can be used for detection.

[0141] In the above implementation process, by setting up multiple sensors to collect first state signals and second state signals, the thermal runaway of the battery pack can be monitored from multiple aspects, so as to quickly detect the thermal runaway situation of the battery pack.

[0142] Based on the above embodiments, in order to prevent false alarms, the number of each type of sensor in the first sensor and the second sensor is at least one, and / or, the second sensor is shared by each battery pack in the battery system.

[0143] For example, two barometric pressure sensors can be configured, such as Figure 2 As shown. A pressure sensor and a smoke sensor (or gas sensor) can also be configured, such as... Figure 3 As shown. It can also be configured with a barometric pressure sensor, a smoke sensor, and a gas sensor, such as... Figure 4As shown, a gas sensor can be used to detect the presence of smoke, a smoke sensor can be used to detect smoke concentration, and a pressure sensor can be used to detect air pressure.

[0144] Understandably, the number of each type of sensor and the configuration of how many types of sensors to use can be flexibly selected according to actual needs.

[0145] Understandably, the above scheme can use multiple types of sensors to detect status data, and there can be more than one sensor of each type. When the alarm system determines an alarm, it can trigger an alarm only if the status signals detected by a set number of sensors in the first sensor group and a set number of sensors in the second sensor group both meet the thermal runaway alarm conditions. Alternatively, it can trigger an alarm only if the status signals detected by a set type of sensor meet the thermal runaway alarm conditions, or it can trigger an alarm only after all the sensors detect status signals that meet the corresponding thermal runaway alarm conditions. These alarm rules can be flexibly set according to requirements in practical applications.

[0146] In addition, all battery packs here share a second sensor. Understandably, all battery clusters are connected to the same exhaust chamber, and the second sensor is installed in the exhaust chamber. In this way, the second sensor can be used to detect whether any battery pack in these battery clusters has experienced thermal runaway.

[0147] In the above implementation process, deploying multiple sensors can improve the accuracy of thermal runaway detection.

[0148] Based on the above embodiments, thermal runaway alarm conditions may include:

[0149] The temperature signal indicates a temperature greater than a set temperature threshold and / or the voltage signal indicates a voltage less than a set voltage threshold, and at least one of the second state signals indicates information greater than the corresponding set threshold.

[0150] Alternatively, the temperature indicated by the temperature signal is greater than a set temperature threshold and / or the voltage indicated by the voltage signal is less than a set voltage threshold, and the rate of change of information indicated by at least one of the second state signals is greater than the corresponding set rate of change threshold.

[0151] Alternatively, the temperature change rate indicated by the temperature signal is greater than a set temperature change rate threshold and / or the voltage change rate indicated by the voltage signal is greater than a set voltage change rate threshold, and the change rate of information indicated by at least one of the second state signals is greater than the corresponding set change rate threshold.

[0152] The following examples illustrate the above conditions.

[0153] Assuming the first sensor includes a temperature sensor and a voltage sensor, and the second sensor includes a pressure sensor, the CSC within the battery pack periodically or in real-time collects the temperature and voltage signals within the battery pack and transmits them to the SBMU. The SBMU simultaneously records the correspondence between the temperature and voltage signals and the battery pack's identifier. The second sensor also periodically or in real-time transmits the collected pressure signals to the SBMU. Upon receiving the temperature and voltage signals from each battery pack, the SBMU first determines whether the temperature indicated by the temperature signal is greater than a set temperature threshold, and whether the voltage indicated by the voltage signal is less than a set threshold. If both conditions are met, it then determines whether the pressure indicated by the received pressure signal is greater than a set pressure threshold. If the conditions are met, it is determined that the battery pack has experienced thermal runaway, and a thermal runaway alarm is output. Conversely, if either condition is not met, it indicates that the battery pack has not experienced thermal runaway.

[0154] Alternatively, first determine whether the temperature indicated by the temperature signal is greater than the set temperature threshold, and whether the voltage indicated by the voltage signal is less than the set threshold. If both are satisfied, then determine whether the rate of change of the air pressure indicated by the received air pressure signal is greater than the corresponding set threshold. Here, the rate of change of air pressure refers to the rate of change between the air pressure obtained at the current moment and the air pressure obtained at the previous moment. The time interval can be set according to the actual situation. If no new battery pack experiences thermal runaway, the air pressure generally does not change much. Therefore, if the rate of change of air pressure is greater than the corresponding set rate of change threshold, it is determined that the battery pack has experienced thermal runaway. Conversely, if either condition is not met, it is determined that the battery pack has not experienced thermal runaway.

[0155] Alternatively, the conditions for temperature and voltage change rates, as well as the conditions for air pressure change rates, can be determined. Temperature change rate can refer to the rate of change between the current temperature and the previous temperature, and voltage change rate can refer to the rate of change between the current voltage and the previous voltage. The time interval can also be set according to the actual situation. If no new cells in the battery pack experience thermal runaway, the temperature and voltage will stabilize after a certain period following the temperature and voltage changes caused by the previously thermally runaway cells, or they will not change too rapidly. Therefore, the temperature and voltage change rates can be used to initially determine whether the battery pack has experienced thermal runaway. If so, the air pressure change rate is checked to see if it exceeds the set threshold. If it does, the battery pack has experienced thermal runaway. Conversely, if any condition is not met, the battery pack has not experienced thermal runaway.

[0156] Understandably, when the second sensor also includes a smoke sensor and a gas sensor, corresponding judgment conditions can be set, such as whether the smoke concentration collected by the smoke sensor is greater than a set concentration threshold, or whether the gas sensor detects the corresponding type of gas, and then this information is used to make a comprehensive judgment. Of course, when making a judgment, it is possible to select some information that meets its judgment conditions to consider that the battery pack has experienced thermal runaway, or it is possible to consider that the battery pack has experienced thermal runaway only when all information meets its judgment conditions.

[0157] Another scenario needs clarification: if a battery pack experiences its first thermal runaway, causing its internal temperature and / or voltage sensors to fail, the temperature and / or voltage signals subsequently transmitted from the CSC to the SBMU may be zero. In this case, the temperature and / or voltage signals will not trigger an alarm. Therefore, the SBMU can continue to check if the gas pressure signal meets the aforementioned conditions. If it does, it can be considered that the battery pack has experienced another thermal runaway. In this case, it can be further determined whether other battery packs in the battery system have experienced new thermal runaways, and thermal runaway handling should be performed according to the number of battery packs experiencing thermal runaways. Of course, for battery packs with failed sensors, nitrogen venting can be directly implemented. Alternatively, if the sensor failure is not due to the first thermal runaway, the corresponding handling measures can be determined by counting the number of thermal runaway alarms for that battery pack, or it can be directly considered that the battery pack is experiencing severe thermal runaway and water fire suppression can be applied.

[0158] Another scenario is that the CSC communication within the battery pack fails due to thermal runaway. In this case, if the SBMU determines that the CSC of a certain battery pack has not transmitted any information after a set time, it can be considered that the battery pack may have suffered severe thermal runaway, leading to a CSC failure. Therefore, the battery pack can be directly subjected to water fire suppression treatment.

[0159] It should be noted that in practical applications, the corresponding thermal runaway alarm conditions can be flexibly set according to actual needs.

[0160] In the above implementation process, accurate detection of thermal runaway can be achieved by setting corresponding thermal runaway alarm conditions.

[0161] Based on the above embodiments, when outputting alarm information, a duration judgment can also be added. If the set alarm interval duration is met, and the target battery pack meets the thermal runaway alarm conditions based on the first state signal and the second state signal, thermal runaway alarm information is output. Here, the set alarm interval duration refers to the duration between the current time and the previous output of thermal runaway alarm information.

[0162] For example, the alarm system can be set with a preset alarm interval, allowing the user to know whether there are two alarms. If alarms are too frequent, the user may not be able to accurately perceive whether it is the same alarm (e.g., whether it is a repeated alarm from the same cell in the same battery pack). Therefore, the alarm system can start a timer after each output of thermal runaway alarm information. After the timer reaches the preset alarm interval, the alarm system can acquire a status signal for judgment. The judgment method for the status signal is the same as that in the above embodiment, and will not be repeated here. If the status signal meets the thermal runaway alarm conditions, a thermal runaway alarm information is output. Of course, if it does not meet the conditions, the alarm system can continue monitoring.

[0163] For example, regarding the first and second sensors, after the alarm system determines that their status signals meet the thermal runaway alarm conditions, it resets the first and second sensors after setting the alarm interval. After the reset, the first and second sensors can re-acquire status signals and transmit them to the alarm system.

[0164] Please refer to Figure 5 , Figure 5 This application provides a structural block diagram of an alarm system 200, which includes:

[0165] A first sensor 210 is installed inside the target battery pack to collect a first state signal;

[0166] A second sensor 210 is disposed outside the target battery pack for collecting a second status signal;

[0167] Alarm device 230 is used to output thermal runaway alarm information when the target battery pack meets the thermal runaway alarm conditions based on the first state signal and the second state signal.

[0168] It is understood that the first sensor 210 in this embodiment may refer to some of the sensors listed in the above embodiments, such as temperature sensors, voltage sensors, etc., and the second sensor 220 may refer to smoke sensors, air pressure sensors, gas sensors, etc. The function of the alarm device 230 in this embodiment is the same as the function of the alarm system in the above embodiments. The specific implementation process can be referred to the relevant descriptions in the above embodiments, and will not be repeated here.

[0169] The alarm device 230 can refer to a processor with an output module or a processing device with a voice module, etc. The specific hardware implementation of the alarm device 230 is not particularly limited in this solution, as long as it can achieve the alarm function of the above embodiment.

[0170] Please refer to Figure 6 , Figure 6This is a structural block diagram of a thermal runaway alarm device 300 provided in an embodiment of this application. The device 300 can be a module, program segment, or code on an electronic device. It should be understood that this device 300 is similar to the one described above. Figure 1 The method implementation corresponds to this and can be executed. Figure 1 The various steps involved in the method embodiment and the specific functions of the device 300 can be found in the description above. To avoid repetition, detailed descriptions are omitted here.

[0171] Optionally, the device 300 includes:

[0172] The signal acquisition module 310 is used to acquire a first state signal collected by a first sensor disposed inside the target battery pack, and to acquire a second state signal collected by a second sensor disposed outside the target battery pack.

[0173] The alarm module 320 is used to output thermal runaway alarm information when the target battery pack meets the thermal runaway alarm conditions based on the first state signal and the second state signal.

[0174] Optionally, the alarm module 320 is used to output thermal runaway alarm information based on the battery pack information of the target battery pack, wherein the battery pack information includes historical thermal runaway alarm information of the target battery pack.

[0175] Optionally, the alarm module 320 is configured to output an alarm message indicating that the target battery pack has triggered an overheat runaway alarm again if the historical thermal runaway alarm information contains information indicating that the target battery pack has triggered an overheat runaway alarm; and to output an alarm message indicating that the target battery pack has triggered an overheat runaway alarm for the first time if the historical thermal runaway alarm information contains information indicating that the target battery pack has not triggered an overheat runaway alarm.

[0176] Optionally, the alarm module 320 is configured to output alarm information for the first thermal runaway of the target battery pack and for multiple battery packs experiencing thermal runaway if it is determined from the historical thermal runaway alarm information that other battery packs in the battery system have triggered thermal runaway alarms. The battery system includes multiple battery packs, and the multiple battery packs include the target battery pack.

[0177] Optionally, the historical thermal runaway alarm information also includes the number of battery packs that have triggered thermal runaway alarms, and determines whether other battery packs have already triggered thermal runaway alarms in the following ways:

[0178] If the number of battery packs is greater than 0, it is determined that other battery packs in the battery system have triggered an overheating runaway alarm.

[0179] Optionally, the thermal runaway handling measures will differ depending on the number of battery packs that trigger thermal runaway alarms.

[0180] Optionally, if the number of battery packs is greater than a first preset value, the corresponding thermal runaway handling measure is water fire suppression.

[0181] If the number of battery packs is less than or equal to the first preset value, the corresponding thermal runaway handling measure is nitrogen release treatment.

[0182] Optionally, the historical thermal runaway alarm information includes the number of thermal runaway alarms. The number of thermal runaway alarms indicates the number of times the target battery pack has triggered a thermal runaway alarm. Whether the target battery pack has triggered a thermal runaway alarm is determined by the following method:

[0183] When the number of thermal runaway alarms is 0, it is determined that the target battery pack has not triggered a thermal runaway alarm.

[0184] When the number of thermal runaway alarms is greater than 0, it is determined that the target battery pack has triggered a thermal runaway alarm.

[0185] Optionally, different thermal runaway alarms require different thermal runaway handling measures.

[0186] Optionally, if the number of thermal runaway alarms is greater than or equal to a second preset value, the corresponding thermal runaway handling measure is water fire suppression.

[0187] If the number of thermal runaway alarms is less than the second preset value, the corresponding thermal runaway handling measure is nitrogen release treatment.

[0188] Optionally, the alarm module 320 is configured to output thermal runaway alarm information if a set alarm interval is met and the target battery pack meets the thermal runaway alarm conditions based on the first state signal and the second state signal, wherein the set alarm interval refers to the time between the current moment and the previous output of thermal runaway alarm information.

[0189] Optionally, the first sensor includes a temperature sensor and / or a voltage sensor, and the first status signal includes a temperature signal and / or a voltage signal;

[0190] And / or, the second sensor includes at least one of the following: a pressure sensor, a gas sensor, a smoke sensor, and the second status signal includes at least one of the following: a pressure signal, a gas signal, a smoke signal.

[0191] Optionally, the thermal runaway alarm conditions include:

[0192] The temperature signal indicates a temperature greater than a set temperature threshold and / or the voltage signal indicates a voltage less than a set voltage threshold, and at least one of the second status signals indicates information greater than the corresponding set threshold.

[0193] Alternatively, the temperature indicated by the temperature signal is greater than a set temperature threshold and / or the voltage indicated by the voltage signal is less than a set voltage threshold, and the rate of change of the information indicated by at least one of the second state signals is greater than the corresponding set rate of change threshold.

[0194] Alternatively, the temperature change rate indicated by the temperature signal is greater than a set temperature change rate threshold and / or the voltage change rate indicated by the voltage signal is greater than a set voltage change rate threshold, and the change rate of information indicated by at least one of the second status signals is greater than the corresponding set change rate threshold.

[0195] Optionally, the number of each type of sensor in the first sensor and the second sensor is at least one;

[0196] And / or, the second sensor is shared by various battery packs within the battery system.

[0197] It should be noted that those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the system and apparatus described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0198] Please refer to Figure 7 , Figure 7 This is a schematic diagram of an electronic device for executing a thermal runaway alarm method, provided in an embodiment of this application. The electronic device may include: at least one processor 410, such as a CPU; at least one communication interface 420; at least one memory 430; and at least one communication bus 440. The communication bus 440 is used to establish communication between these components. In this embodiment, the communication interface 420 is used for signaling or data communication with other node devices. The memory 430 may be a high-speed RAM or a non-volatile memory, such as at least one disk storage device. Optionally, the memory 430 may also be at least one storage device located remotely from the aforementioned processor. The memory 430 stores computer-readable instructions. When these computer-readable instructions are executed by the processor 410, the electronic device performs the aforementioned... Figure 1 The method and process are shown.

[0199] Understandable. Figure 7 The structure shown is for illustrative purposes only; the electronic device may also include components that are more advanced than those shown. Figure 7The more or fewer components shown, or having the same Figure 7 The different configurations shown. Figure 7 The components shown can be implemented using hardware, software, or a combination thereof.

[0200] This application provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, performs the following... Figure 1 The method process executed by the electronic device in the illustrated method embodiment.

[0201] This embodiment discloses a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions, and when the program instructions are executed by a computer, the computer can perform the methods provided in the above-described method embodiments, such as including:

[0202] Acquire a first status signal collected by a first sensor located inside the target battery pack, and acquire a second status signal collected by a second sensor located outside the target battery pack;

[0203] If the target battery pack meets the thermal runaway alarm conditions based on the first state signal and the second state signal, a thermal runaway alarm message is output.

[0204] In summary, the embodiments of this application provide a thermal runaway alarm method, system, device, electronic device, and storage medium. By acquiring a first state signal collected by a first sensor disposed inside the target battery pack and a second state signal collected by a second sensor disposed outside the target battery pack, and determining that the target battery pack meets the thermal runaway alarm conditions based on the first and second state signals, thermal runaway alarm information is output. Since the second sensor is disposed outside the target battery pack, even if the first sensor fails due to thermal runaway of the target battery pack, if thermal runaway occurs again, it can still be detected by the external second sensor to trigger the alarm again. Thus, this solution can be applied to scenarios of continuous thermal runaway of multiple battery cells, so as to detect the continuous thermal runaway of multiple battery cells in a timely manner.

[0205] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0206] Furthermore, the units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0207] Furthermore, the functional modules in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0208] In this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying any such actual relationship or order between these entities or operations.

[0209] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A thermal runaway alarm method, characterized in that, The method includes: Acquire a first status signal collected by a first sensor located inside the target battery pack, and acquire a second status signal collected by a second sensor located outside the target battery pack; If the target battery pack meets the thermal runaway alarm conditions based on the first state signal and the second state signal, a thermal runaway alarm message is output.

2. The method according to claim 1, characterized in that, The output thermal runaway alarm information includes: Based on the battery pack information of the target battery pack, thermal runaway alarm information is output, wherein the battery pack information includes historical thermal runaway alarm information of the target battery pack.

3. The method according to claim 2, characterized in that, The step of outputting thermal runaway alarm information based on the battery pack information of the target battery pack includes: If the historical thermal runaway alarm information contains information indicating that the target battery pack has triggered an overheat runaway alarm, then an alarm message for the target battery pack to experience thermal runaway again will be output. If the historical thermal runaway alarm information includes information indicating that the target battery pack has not triggered a thermal runaway alarm, then an alarm message is output for the first occurrence of thermal runaway in the target battery pack.

4. The method according to claim 3, characterized in that, The output includes alarm information for the first thermal runaway of the target battery pack, including: If, based on the historical thermal runaway alarm information, it is determined that other battery packs in the battery system have triggered thermal runaway alarms, then alarm information is output for the first occurrence of thermal runaway in the target battery pack and for multiple battery packs experiencing thermal runaway. The battery system includes multiple battery packs, and the multiple battery packs include the target battery pack.

5. The method according to claim 4, characterized in that, The historical thermal runaway alarm information also includes the number of battery packs that have triggered thermal runaway alarms. Whether other battery packs have already triggered thermal runaway alarms is determined using the following methods: If the number of battery packs is greater than 0, it is determined that other battery packs in the battery system have triggered an overheating runaway alarm.

6. The method according to claim 4, characterized in that, The number of battery packs that trigger thermal runaway alarms affects the thermal runaway handling measures.

7. The method according to claim 6, characterized in that, If the number of battery packs is greater than the first preset value, the corresponding thermal runaway handling measure is water fire suppression. If the number of battery packs is less than or equal to the first preset value, the corresponding thermal runaway handling measure is nitrogen release treatment.

8. The method according to claim 3, characterized in that, The historical thermal runaway alarm information includes the number of thermal runaway alarms. The number of thermal runaway alarms indicates the number of times the target battery pack has triggered a thermal runaway alarm. Whether the target battery pack has triggered a thermal runaway alarm is determined by the following method: When the number of thermal runaway alarms is 0, it is determined that the target battery pack has not triggered a thermal runaway alarm. When the number of thermal runaway alarms is greater than 0, it is determined that the target battery pack has triggered a thermal runaway alarm.

9. The method according to claim 8, characterized in that, Different thermal runaway alarms require different thermal runaway handling measures.

10. The method according to claim 9, characterized in that, If the number of thermal runaway alarms is greater than or equal to the second preset value, the corresponding thermal runaway handling measure is water fire suppression. If the number of thermal runaway alarms is less than the second preset value, the corresponding thermal runaway handling measure is nitrogen release treatment.

11. The method according to any one of claims 1-10, characterized in that, The step of outputting thermal runaway alarm information when the target battery pack meets the thermal runaway alarm conditions based on the first state signal and the second state signal includes: If the set alarm interval duration is met and the target battery pack meets the thermal runaway alarm conditions based on the first state signal and the second state signal, then a thermal runaway alarm message is output. The set alarm interval duration refers to the time between the current moment and the previous output of the thermal runaway alarm message.

12. The method according to any one of claims 1-10, characterized in that, The first sensor includes a temperature sensor and / or a voltage sensor, and the first status signal includes a temperature signal and / or a voltage signal; And / or, the second sensor includes at least one of the following: a pressure sensor, a gas sensor, a smoke sensor, and the second status signal includes at least one of the following: a pressure signal, a gas signal, a smoke signal.

13. The method according to claim 12, characterized in that, The thermal runaway alarm conditions include: The temperature signal indicates a temperature greater than a set temperature threshold and / or the voltage signal indicates a voltage less than a set voltage threshold, and at least one of the second status signals indicates information greater than the corresponding set threshold. Alternatively, the temperature indicated by the temperature signal is greater than a set temperature threshold and / or the voltage indicated by the voltage signal is less than a set voltage threshold, and the rate of change of the information indicated by at least one of the second state signals is greater than the corresponding set rate of change threshold. Alternatively, the temperature change rate indicated by the temperature signal is greater than a set temperature change rate threshold and / or the voltage change rate indicated by the voltage signal is greater than a set voltage change rate threshold, and the change rate of information indicated by at least one of the second status signals is greater than the corresponding set change rate threshold.

14. The method according to claim 12, characterized in that, The number of each type of sensor in the first sensor and the second sensor is at least one; And / or, the second sensor is shared by various battery packs within the battery system.

15. An alarm system, characterized in that, The system includes: A first sensor is installed inside the target battery pack to collect a first state signal; A second sensor is installed outside the target battery pack to collect a second status signal; An alarm device is used to output thermal runaway alarm information when the target battery pack meets the thermal runaway alarm conditions based on the first state signal and the second state signal.

16. A thermal runaway alarm device, characterized in that, The device includes: The signal acquisition module is used to acquire a first state signal collected by a first sensor located inside the target battery pack, and to acquire a second state signal collected by a second sensor located outside the target battery pack. The alarm module is used to output thermal runaway alarm information when the target battery pack meets the thermal runaway alarm conditions based on the first status signal and the second status signal.

17. An electronic device, characterized in that, It includes a processor and a memory, the memory storing computer-readable instructions that, when executed by the processor, perform the method as described in any one of claims 1-14.

18. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it performs the method as described in any one of claims 1-14.

19. A computer program product, characterized in that, It includes computer program instructions, which, when read and executed by a processor, perform the method as described in any one of claims 1-14.

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